eat eee | . bane. Dare [compiled by | tacs uners Haistanael I COMMENCING OF SPEED CONTROL | { { | Page: 1b | Dep Chee hed Approved by | I uae (06.03.85|Timo Lehtonen ! | ai I | Teeue: | ! i Lift speed concrol system developed on the basis of TAC}. Roch ayatems have the same input and output connections. at TACS, it in also possible to choose betwee 40 electronic or a relay output. The controller card 57212G01-G0% of TACS is similar to that of TAC3. Therefore, the instruction AM 10 24 17 for coumeacing the TAC3 can be us alao for TACs. The only difference of these systems effecting on the commencing is the service drive apeed. At TACS, the service drive speed is conatant and the durance of an uninterrupted sarvice drive is Limited to approx. 30 a. The service drive speed is adjusted co the correct value by means of the uated on the firing card 3$7315C01-G03. The jumper hu in che position "L" at nominal speeds of 0,8~1,25 m/a and in the po "2" ac the aominal apeed of 1,6 o/s. The jumper X2 situated on the firing card 357315G01-G0) has to be in che position "1" at nominal apeeds of 0,8-1,25 m/s and in the position "2" at the nominal epeed of 1,6 0/8. This jumper is used to adjust che apeed measuring of 0,1 a/s (VO3). Agjustment points of the controller card 57212G01-c04 DO NOT DETACH THE CARD FRON THE RACK BEFORE SWITCHING OFP THE MAIN VOLTAGE, Novice! fon card marking is HKEP209. The expar Location of adjusement points| : cols) ee 1 COMMENCING OF SPEED CONTROL {Depe. Dete [compiled by Tchecked by “Tapproved by |WAT 04.03.85|Timo Lehtonen lore eet jae I bcatite) tetera 2.2 LEDs axe ic, vhen SA The lift has not reached the 2 m deceleration point (in G03 and C04 types only) 3B The ligt has not ceached the 1m deceleration poine Ac Normal drive TNC Deceleracion increases ft DEC Daceleration decre 2.3 Potentiometers . RL Adjustuent of the acceleration i) Acceleration decreases CG Acceleration incresses R2 Levelling accuracy (+ 2 em) > Shorter braking distance RS Levelling accuracy (+ 8 mm) " » Shorter braking diatance RG Adjustment of che stare C The acarcing torque increases RS deceleration linearity 7 Turn Ga | if LED INC ia Lic Tura 8) , if LED Dec is lit Re Adjustment of the deceleration The deceleration incre: md the pitch at the begianing of tha deceleration decreases The deceteration decreases and the hitch at the beginning of the deceleration increases D) Decaleracion increases CC deceleration decre | | : RT Adjustment of the deceleration of « one-floor runTaCS LtTS. COMMENCING OF SPEED CONTROL, 06.03.85|Timo Lehtonen \ iyalag, ! es a Re adjusemenc of waxigum braking voltage > voteare increas 2 Sviechea (position ON) m2 DC-braking ae che scare x3 Removes the effect of 1 m deceleration point 2.5 Measuring points as Speed ceferance 23 Deceleracion reference M3 Firing reference of the driving chytiscors (high speed winding) 4/3 Firing reference of the braking thyristors (low speed winding) 5/3 Maximum Limie of the braking voleage 6/3 Memory of the geximum braking voltage 3 Orlevel of the electronics 3 Adjustment of aormal drive (empty car) Meaaure all voltages against che O-level of che electronics (HP7/3). The voltages £0 be measured are DC-voltager vithin the range of 0..,10V. 4.1 Swiech X2 to che position OFF. 3.2 Adjust the poreationater Ri a0, that che voltage at HPJ/2 = 6,0V. 33 Adjust BB a0, that che valeage #c HP5/3-» 7,0¥, 3.4 Adjust R7 so, thac che decelerazion of the one-floor run is ac its einimum (Look at the poine 2.3). 3.3 Adjust Rl 20, that che acceleration is 3/6 of ite greatest value (Look ac the poing 2.3). Adjusc Rl, when che lift stands ar a floor. 3.6 If the controfler card is $7212G01 or G02, go direct to the point 3.10. a7 Switch X3 to the position ON. 3.8 Drive the Lif tvo floor distances in doch directions ané sdjust the potestioneter RZ #0, that the lift stops precisely (+ 2 cm).i Tacs LrFTs | COMMENCING OF SPEED CONTROL { (Dept. Date [coapiled by Tohecked by [Approved by [WAT 04,03.85/Timo Lehtonen Juaa1z lh a9 Bviteh X3 co the position OFF. 3.10 Drive the lift two floor distances in both directions snd adjust R3 eo, that the lift atope precisely (+ 8 ma: 311 Drive one floor distance in up direction and adjust R6 so, that a hitch can be felt in the car at the beginning of the deceleration. Then cura 26 back juec a little wo that you cannot feel the hitch anymore. 3.12 Drive the ligt evo floor distances in toch directions and adjuec RS #0, that the deceleration increasas in one direction (INC is lit) and LEDs INC and DEC decreases in the opposite direction (DEC ie lit). Re igmediately after LED AC hae gone out. “e 3.13 Re-edjust the levelling accuracy a@ shown at the point 3.10: : gel yd just RS as shown at the point 3,12. 3.15 Connect the V-neter to che measuring point MP6/3. 3.16 Drive the life in the up diraction (tvo floor distances) and read the highest value of the V-neter. way Adjust RB so, that che voltage at MPS/3 is i,5 V higher chan the value received ac the point 3.16. Adjuet RB, vhen the lift stands at a floor. 3a Adjuac RG ao, that the motor rolls back approx. 3 1 aured from the hand vhael circumference, vhen starting Co the down direction (with an enpty car), Make aure that you cannot feel chia movement to the wrong direccion in the car. If the motor does not roll back ell or the movenent is too small, the stare in tha up direction can be bad (the starting torque L¢ too high). aay Lf the start is too hard, sviteh X2 €0 the position ON, The position ON gives « becter start, but it 4s recommendable to use the position OF, if the scart is sufficiently good at it, since thera is lesa potor heating and lene noise at che stare in this position, 4 Final adjustment rar Adjust the acceleration by the potentiometer Ri and che deceleration by the potentioneter R6 according to the requiresants set to the run of the life. 4.2 Gounact the V-ueter to the measuring point MP 6/3. 43 Drive the lift two floor distances in the down direction «nd read the bigheet velue of the V-aerer. bab Drive the 1ife one floor distance in the down direction and adjust R7 so, chat the highest value of the V-ueter is 0,3 V lower than the value received at the point 4.3, This way, che deceleration vill be the sane in the one~ and tworfloor run. 4.5 Check from the car that che lift stops precisely.1 T H | racS SPEED CONTROL | at 10 34 44 | |} FUNCTION DESCRIPTION 1 i 1 | Page: i [Bepe. Bate [Compiled by Tonecked by “Tapproved by | -" 28.4,86|8 Suur-Askols iHaT 28.4.86]S Suur-As! fo op | : I LP6GE L | | CONTENTS: FUNCTION PRINCIPLE STRUCTURE CONNECTIONS, Inputs Input Conditions outputs Outpuc Versions Power Supply Conneccions Internal Connections NORNAL DRIVE CONDITION Regularor Card Block Descriptions Commencing of Drive Acceleration Drive with Full Speed Starting of deceleration Deceleration Levelling Stopping Measuring Devices on the Card Firing Card Black Description Thyristor control Supervisions Stopping Mother Board Task Version variables Power Electronics Regulation Principle Thytisror Characteristics Thyristor Procection Thyristor Circuit/Trouble shooting SEVICE DRIVE RELEVELLING DIAGRAMS' { YACS SPEED CONTROL 1 at 10 34 44 | FUNCTION DESCRIPTION i 4 { page: 2 \ (Tept. Date [Compiled by Checked by TApproved by 7 liar 28-4-86(8 Suur-askola | o> i LS) ee [Li64e, i coos: t 1. FUNCTION PRINCIPLE TACS Drive System is equipped with a two speed AC-motor. The high speed winding is supplied with thyristor regulated AC-current. As a result it is possible to regulate the motor torque. The low speed winding is controlled by a thyriscor bridge. Thus by regulating the DC-current it is possible to regulate the braking torque. This kind of regulation method is called the stator voltage regulation, assisted by aa eddy current brake. Oriving Main bridge Direction contac ter rr eantacters, co aes E frm T ecremeter Speed wnformation Contret The motor rotation speed coincides with che crossing point of the Lift counter~corque and the motor torque curves. As ¢ cesult that the motor torque turns horizontal due to decreased voltage the crossing point of curves is rather unstable, especially if low speeds are usea. If the regulation is based on voltage only, not observing the speed, even a minute change in che counter-torque is sufficient to make a considerable difference in speed. Therefore the speed must be measured constantly, and the voleage wust be regulated for as long as the motor torque and the counter torque curves cross at the desidered point. The speed measuring is done using a tachometer. If the speed information received from the tachometer is too low the voltage co che motor will be increased with the result that the crossing point of curves goves co the right (See figure 2). In an inverted case che voltege will decrease.T J TAGS SPEED CONTROL | aw 10 34 44, | FUNCTION DESCRIPTION | fi | | Page: 3 i Dept. Date [Compiled by Tchecked by TApproved by | P lust | 28.4.8618 Suur-Askola Lop i | Iseue: } J L164e, | I L ! I Torque Yoltage Motor torque depending on = Votiage recewed by motor Counter toraue depending on: =Drive direction Stead Motor rotetion speed By means of the above method it is possible to sex che lift speed such as desidered. The TACS speed reference is so adjusted that the acceleration and the braking happen smoothly. At braking che rest of che braking distance is measured, and on basis of che results received che motor input voltage is either increased or decreased. This ensures an accurate levelling. Actuat | Actual lift erat y velue = speed Speed reference Nominal speed Tine Formation of speed reference and actual value Speed Load takes over Distance calculation corrects, Time Example: Effect of load to cecet eration Fig. 3.} T | TACS SPEED CONTROL {AM 10 34 44 | FUNCTION DESCRIPTION 1 { | Page: & {Dept. —Date ICompiled by 1 Checked by TApproved by ay WHAT 28.4.86/S Suur-Askola =f 7D | BS toeur lne4e i L ! | \ | 1 i t f When 2 Lift receives a start command the speed reference on the regulator card begins to increase. The regulator compares the real speed received from the tachometer to the speed reference, and sets the motor voltage so chat the real speed corresponds with the speed reference constantly. When the motor has reached the nominal lift speed the regulator gets disconnected leaving the thyristor fully conductive. The deceleration starts (at approaching the floor level) as soon as the command to brake arrives from the lift well. The travel distance calculation to the floor level begins, and che regulator is activated. The speed reference begins to decrease, and so does the motor voltage. Simultaneously the voltage to the brake winding increases initiating motor braking torque. If che speed is too high for the rest of the distance, the regulator proceeds to decrease the motor voltage until the deceleration rate is sufficient for accurate levelling. If the lift is about to stop before seaching the floor level, the regulator will increase cle motor voltage with tne result that the motor operates longer. The firing cara is required to convert the voltage received from the regulator, to suit the thyristors. The motac voltage can be changed by changing the thyristor "UN'"-cime. Because che thyristor is a ewitch which does not get Connected, but will get disconnected as soon as the supply voltage drops to zero, the "ON" -cime is regulaced by regulating the firing moment. Therefore it is necessary to synchronize the firing so that it matches the main supply voltage. Voltage Voltage given by regulator, Voltage Voltage received by motor follows the voltage given by regulator Fig. 4i { TACS SPEED CONTROL | at 10 34 44 | FUNCTION DescRIPrion ! L | Page: 5 |Depe> Date [Compiled by Tehecked by Tapproved by p | IAT” 26.4865 Suur-Askola | | of Issue: [1164 L | 1 2. STRUCTURE TACS, which is also called BLACK BOX, consists of three parts: = control electronics ~ power electronics = accessories The control electronics include the = regulator card - firing card which are housed on the mother board. The power electronics include the een 3d = thycistor control and protection circuits (pulse transformers and RO-procections) = cooling fan (if necessary), housed on che common cooling elewent. Accessories: - Supply cransformer for eleccronics - raaio interference suppression = choke - capacitors - assembly board.! T | TACS SPEED CONTROL | an 10 36 44 | ruxeriow bescriPrion | 1 | page: 6 i \Dept. Date [Compiled by Tchecked by Tapproved by : [Har 28.4.86]8 Suur-Askola 1 t £9 | Issue: i164, I Fee I i Fig. 5.{Depe- {HAT [1164 a. 3.1 3.2 3.3 1 T | TACS SPEED CONTROL 1 aM 10 34 44 | FUNCTION DESCRIPTION | i | Page: 7 Date [Compiled by Tchecked by TApproved by amt : -4,86]S Suur-askola “| Issuer 284,86] Vp. | Wy 1 CONNECTIONS Inputs: Inpats SA, SB, AC, ND, TA and HA are designed for 60V non-filtered full wave rectified voltage (relay control). Their parallel inputs (SA2, SB2, etc.) are designed for filtered 24V voltage (transistor control). When at a later stage it states that an input is "1" (f.ex. SA = 1"), if means that the input has voltage. Equally, if some input is described as "U" (f.ex. SA = “O") it means that there is no input voltage (it is in zero). = Sa (SA2) will indicate when deceleration has to start. The deceleration will start when SA (SA2) changes to "0". = SB (SB2) will check the distance yet to cravel. The check up takes place when SB (SB2) changes to "0". The check-up point will be set at mid-deceleration discance. - under normal drive condicions AC (AC2) will give a permission to proceed. the start takes place when AC (AC2) changes to "I = ND (ND2) will indicate the travel direction. The cer travels in the down direction when ND (ND2) is “L". - TA (TA2) will indicate when to start relevelling. The relevelling begins when TA (TAZ) changes to "1". - HA (HA2) indicates when to start on service drive speed. The start will take place when HA (HA2) changes to "1". = TACHOL and TACHO2 are for speed information. They are directly connected to the tachometer so that LED MI does not illuminate when starting the drive. Input conditions: = Out of the AC, TA and HA inputs only one is allowed to be valid at a time, ice, only one can be "1", ~ the SA’ and $8 inputs can be "1" only when AC-input is valid. - If SA is "1" also SB must be "1". = No-input aust be "1" when the car travels in the down direction. Outputs: ~ the VR transistor-output or VR/1, VR/2 relay-outputs indicate the following shortcomings: one oF more phases lack from the motor - the service drive has lasted too long = there is no tachometer voltage, or it flows in the wrong direction ~ the car overspeeds ‘The transistor output is normally is closed. - the LR transistor output, or LR/1, LR/2 relay output indicates that the car travels on @ speed which is more than 1% of the nominal speed. When the speed exceeds 1% of the nominal speed, the eransistor output is "0", and che relay output contact is closed. This information i utilized for closing of the brake. = the vo3/i, Vo3/2 relay output gives an information when the lift, speed is less than 0.3 m/s. This information is required for the advance opening of car door, and for relevelling. The relay output contact is closed when the car speed is less than 0.3 m/s. » or the relay ouput contact1 T j | TACS SPEED CONTROL aM 1034 44 | | FUNCTION DESCRIPTION i I Page: 8 | i | | (Dept. _ Date [Compiled by Tchecked by Tapproved by 1 {HAT 28.4.86{S Suur-Askola Ieee | GO! Issu [1L64E I | coat i 1 — the KP/1, KP/2 relay output is used for releasing the contactors when the car is stopped. The LR/1, or LR/2 relay output is similar except that the KP-relay is cime delayed. 34 Output versions: ‘As for output connections there are two TACS drive versions: - one with the VR, LR and VO3 transistor outputs provided no advance joor open"-relay is required, and the contactors are released by means of the TNS-control. ~ one equipped with all relay output connections 3.5 Power supply connections: - Electronics transformer supplies Al, BL and Cl. = Main power supplies a, B, C and N (WN is not compulsory). = Motor outputs 0, — ana F. - DC-supply for the eady current coils G and H. - X ana 1. fan supplies. 3.8 Internal connections - the nother board firing ourputs, and the pulse transformer primaries housed on the RC-protection cards, are joined with eight wires. - the secondary wiring of electronics transformer is connected to the mother board terminals Ul, V1, WI and O/E.q 1 | TACS SPEED CONTROL | AM 10 36 44 | FUNCTION DESCRIPTION { I 1 Page: 9 \Depe. Date [Compiled by Tchecked by Tipproved by , [HAT 28,4.86/S Suur-Askola ! RB | fif\ Bsues |1L64e, I! | sed i ZA | 4. NORMAL DRIVE CONDITION 4a Controller card etal Block description: AMPLIFIER DESCRIPTION FUNCTION DESCRIPTION aa SB inpue Modifies the input signal value 7a A input Modifies the input signal value ne Discance integrator Calculates the floor distance still co y travel during the deceleration phase nis Distance integrator As above but starting fron che miadle of deceleration distance. This improves the calculation accuracy. Sa AC input Modifies the input signal value M38 ‘Time delay Forms a time delay between the main contactor and the speed reference. This is necessary so that the brake has time to open MBATMBB: Timer Calculates the formula v = ds/dt from which dt is used for deceleration calculation ZA Deceleration calculator Calculates the deceleration values (during deceleration) about every 2 ms. Calculates the formula a = dv/dt with de value received from the timer with che result of ) ‘ a 2s where the coefficients involved have been observed. M25 Peak value detector Memorizes the voltage which equals that which momentarily appears at the input. MOA Deceleration reference Forms a deceleration reference by following the voltage given by the peak value detector (without loading this). Moa Calculation termination Terminates the deceleration value calculations when the car approaches the floor level (7 ea) _ MSA Rounding circuit Rounds the speed reference when the car approaches the floor level (1 cm). This procedure smoothens the arrival of car at the Landing.| T | TACS SPEED CONTROL | aM 10 34 44 | FUNCTION DESCRIPTION | | I rage: 10 Ibept. Date [Compiled by (checked by TApproved by ie TWAT 28.4.86]S Suur-askola = | 7 I f } | tséve: [1164 i 4 aan I I MB, Acceleration permission If che deceleration value is insufficient when a deceleration command arrives, this circuit continues to accelerate. Mop Acceleration reference Forms an acceleration reference with the start rounding included. Speed reference Forms speed reference on basis of the acceleration and deceleration references. During a full speed drive this circuit is saturated, and the thyristors are fully conductive. There is no speed regulation either. Noa, ue Resec circuit Resets the speed reference within the activated zone when che deceleration starts. Used also for regulation of deceleration value. M108 Controller Controls the motor torque by comparing the actual value co the speed reference, la Braking controller Controls the DC-supply for motor in accordance with the requirement of the above regulator. the DC-supply generates motor braking torque. mB Limiccer Limits the DC-supply value so that no regulation error, if any, will destroy the motor winding. M108 Braking booster Boosts the DC-braking at the deceleration start until the tachovoltage value has decreased to 85% of its nominal value, n3B Linearity indicator Indicates the deceleration linearity by comparing the deceleration value at the start, and at stopping. When the separate LED for the opposite direction is illuminated the deceleration is linear. ais pCrsupply menory Neaorizes the highest braking current value during deceleration 41.2 Starting of a normal drive Setting of inputs at the start: = the SA and SB inputs are set on "I" (the deceleration has not started yet). - the TA and HA inputs are kept in "0" (because of the normal drive). = the ND input is set according to the drive direction. - the AC input is set on "1" hen atcempting a start.T | tacs seeeD conan | a 10 6 a4 | FONCTION DESCRIPTION ! | | Page: iL \Dept. Date [Compiled by Tohecked by Tapproved by ii I [HAT — 28.4,86[S Suur~Askola Lazo t Yi! [1L64e I I a 1 sect Functions at starting of a drive: the SA input, when "I", performs the following procedure adjusts the output of che M7B distance integrator to +10V This equals the deceleration distance, which usually is 2 m- The secting is done with the Ql0-switch, and with the resistors R96 and R97. - Sets the acceleration reference (M68) to zero. This happens with the aid of the R37 and R61 resistors, and with D21 and 020 diodes. The zenerdiode 020 prevents the H68 ampligier output from turning negative. - Connects the M66 acceleration reference to the MIA speed reference input by means of Y6 witch. - Prevents, by means of the Q? switch, the Mid deceleration reference from entering che N9A speed reference integrator input. 2 - Prevents, by means of the D19 diode and the X02 resistor, the MILA brake regulator from giving braking reference to the firing board. The positive voltage at HIIA output generates DC-braking in the The 8B input when "1" generates the following procedure: - sets MIB distance integrator output to +10V. The setting takes place with Ql, R27 and R28. This equals 50% of the deceleration distance, which is often 1 a. = connects the M7B distance integrator to the MBA*N8B timer by means of the Q9 switch. When che AC input turns "1" the transistor Q8 collector turns negative within a few moments. The 859~C8 delay is necessary for the brake co open before starting of drive. The Ql? switch opens, and the MOA speed reference starts increasing. The MOB acceleration reference starts co increase linearily cowards 10V value (the rate is determined by R22 and C10). This rounds the M9A speed reference. When the speed reference increases it also increases the difference in relation to the actual speed (VT). The MI0B, which regulates the motor torque, detects the difference betueen the MIA speed reference and the actual speed (VI). It thus regulates the torque so that the difference remains almost insignificant. The starting torque can be regulated by means of che R4 potentiometer. DC~braking can be applied momentarily if a requirement for a smoother drive start arises. The X2 switch is used for this procedure. When the acceleration reference MOB is zero the braking torque regulator MIIA output is +5¥. This is due to R65. When the acceleration reference increases to +10V the influence of the former is suppressed with R65.1 i I | TACS SPEED CONTROL | aM 10 34 44 | FUNCTION DESCRIPTION i | | Page: 12 |Depe. Dace [Compiled by [checked by Thpproved by eee [kat 28.4.86|5 Suur-askola | 7 | I tesuer {1164E 1 | as | i | GLE... o ee 7 2 mee OD MH. od fe v0 7 ini 7 Face 4.1.3 Acceleration: Alchough che acceleration reference remains 10V (its constant value) the M9A speed reference continues to increase until the M9A amplifier Teaches saturation. The M10B motor torque regulator will ensure chat the real speed is equal to the speed reference. The more positive the M105 amplifier output voltage the higher the motor torque. When the speed reference reaches saturation also the M10B regulator becomes saturated, and the thyristors become fully conductive. This procedure ensures chat the lift car will reach its highest possible contract speed.' T | TACS SPEED CONTROL {AM 10 34 44 | FUNCTION DESCRIPTION | | | Page: 13 |Depe. Date [Compiled by TGhecked by TApproved by | [war 28.4.86}S Suur-askola | | "Op | Issie: 11164E I WEEE: I 1 ails Drive on full speed: When che speed nears its nominal value the motor torque decreases and the life speed is smoothly stabilized to an approximate value in which che lift and che motor corques correspond. This happens naturally whenever a squirrel cage motor is used. As a result no rounding realized with electronics, is required. 4.1.5 Deceleration start: The deceleration starts when the SA input becomes "0" (or that of SB it the nominal car speed is 1.25 m/s or less). The information must be given at che righr moment because che SA (SB) input will determine the rest of the travel distance. If the information to start deceleration is determined by the vanes in the well, the vanes aust. be installed with utmost care. tiben $A becomes "0" the following procedures cake place: - The acceleration reference will be disconnected by the Q6 switch. - The MGA deceleration reference will be connected to the speed reference input by che Q7 switch. The Lift speed must, however, be auggiciently high otherwise the deceleration will be very sluggish. This kino of situation may arise when a car travels a short floor-co-floor distance, and che influence of deceleration vane interferes inmediately after start. The connection is supplemented with MaB acceleration permission in order to avoid this kind of situation, should such occur. The circuit follows the deceleration value, and permits 4 deceleration if the values are within the 0.35...1,0 o/s*. The above limits can be adjusted by means of the R7 potentionel In order to prevent the short floor-co-floor distance speed reterence from turning coo steep the acceleration reference is disconnected by the Q6. This is done even if there are no synptons of any influence of the deceleration reference yet. Due to this the speed reference remains momentarily constant, i,e., until the deceleration starts. - The M9B reset circuit activates che speed reference. The reset point is determined by R6. Too vigorous resetting may cause a vact difference between the reference and the actual value. If so, che regulator attempts to correct the difference immediately, This correction is rather unpleasant, and must be re-adjusted. - The braking regulator is activated wich D19 and R62. ‘The moment che braking starts, and the tachometer voltage is still high, che M10A brake booster circuit's output voltage is negative. The higher che cachovoltage the aore negative ic is. Through R109 and D63 chis voltage has an influence on the M114 braking xegulator, increasing che motor DC-current supply. Note that in addition co this the M10B regulator itself, assisted by R91, regulates the D¢-current flow. When che speed decreases the requirement for stimulation ends. As a result the influence of MLOA disappears along with che decreasing tachovoltage.' T {| TACS SPEED CONTROL | aM 10 34 44 | FUNCTION DESCRIPTION I i ! I Dept. Date |Compiled by Tchéecked by TApproved by [RAT 28.4,86/S Suur-Askola fete es | £9 Issue: |164e | | SA ° 1 “< , WLLL ° - A ae LLP ° a u Ieee \ | we VM o 4 f i ee ‘ t | l 5 t Li Mioa 1] : i 5 paelecer ot ud i Ieee Fig. 7. 4.1.6 Deceleration: In the beginning the M2A deceleration calculator has a value which fully covers the deceleration distance. When the starting point for deceleration has been passed the M7B distance integrator begins to calculate the distance yet to travel. The travel distance ahead will be recorded at the NBAWM85 cimer's input point. This is done with R98 (Q9 is conductive). The actual value of speed (VT) is connected to the MBB timer comparator by means of the R75 resistor.Y PTSD | acs sate com, Fat 10 34 a4 | FUNCTION DESCRIPTION 1 i | Page: 15 \Depes Date [Compiled by Tohecked by Tapproved by | [mat 28.4.86|5 Suur-Askola lon i 7b Issue: iad f i |a164e The first part M8A is an integrator, where the integration time is determined by its second part MBB. This being a comparator which compares the said integrator, and the actual value of speed VT. The comparator output speed has been increased by mean of the Ql6 transistor, and wich D51, R77, C19. The duty of che D49, D50, R76 and C18 circuit is to forma reset time between the two integration phases. This procedure will ensure the discharging of Cll ja C17 capacitors. vT = eav 31 = 10v 82 = 10¥ voage a ° ° Time MBA -a6+ Example: the voltage given by M@A-MeB timer The peak value is relative to the ft speed, and time ct depends on the elation of the distence(s) yet. 10 {rave and ‘that of iif! speed (VT) The ,zero setting t iS determined by R76 ond cB. Fig. 8. The entire MBA*N8B timing circuit functions as a derivator with che result of a short tine dt ds/v which is used in the deceleration value calculations. The deceleration calculator also functions as a derivator using the shore time (above) in calculating the formula below at dv/dt The final result, when the circuit's coefficients have been observed, is 2 2s ae » where v= actual value of speed VT and 5s = the distance yet to travel, which is calculated by means of the M7B and MIB distaace integrators.T 1 ' | navs spe contaon [am 10 36 46 | | FUNCTION DESCRIPTION i i | | Page: 16 | \Depe. Date ICoapited by Tehecked by Tapproved by ee 1 [HAT —28.4.86/5 Suur-Askola lo op 1 { Issue: | I1164E i I font 1 I | The peak value of the MZA deceleration calculator equals the value received on basis of the former formula. Therefore the H2B peak value detector is needed, too. This circuit stores the highest voltage value at the input point to the C5 capacitor. To prevent the capacitor from getting loaded, it is provided with the Mus voltage follower. The M4A circuit output thus has a deceleration value vinich is required for levelling. The M9A speed reference is formed on basis of the above deceleration value. The H10B regulator attempts to follow the speed reference (M9A). The deceleration calculator functions during the entire deceleration phase. Lt gives @ corrected result at every ims. Therefore the car load, temperature and speed have no effect on the levelling. The component tolerances and the tachometer accuracy, however, cause an error. Despite that the error is small, and largely corrected in the connection of the conmencing of drive, lifts with high speed TAC drives are equipped e@ Wich the S8-check poinc. When chis point is passed the rest of the distance is reset with the MIS integrator once more. The influence of N7# discance integrator disappears when the SB input changes to "0". his happens by means of the Q9 switch. wa Levelling Just before reaching the floor the deceleration value is stabilized. The deceleration calculator, however, makes accurate calculations Fight upto the landing. Sut’ to correct the actual error would require considerable motor braking torque, which in curn will cause a substantial UC-peak at stopping. Because the error, which eppears during che rest of the travel distance ie rather insignificant, and because the arrival at landing can be rounded as permanent, the stabilation of deceleration value seems well founded. The stabilization is done by means of the M6A circuic, which appr. 7 cm fron the landing turns negative and disconnects the H2ZA circuit integration by means of R46 and D29. D31 prevents the discharging of C5 through R48. e The rounding of the speed reference is started appr. 1 cm from the landing. The M3A circuit curas negative with the result that the constant current starts flowing through Q5. The constant current discharges the C3 capacitor, and the stabilized deceleration value decreases as a resulc. The decreasing causes rounding of the speed reference, and the regulator forces the motor to accommondate the changed conditions. 418 Stopping Due to the use of eddy current brake it is not possible to stop the motor complitely. Therefore the final stopping is performed with mechanical brake at the stage when the lift speed has dropped to less than 1% of irs nominal speed. The speed reference is allowed to continue passed zero to a positive value so that the attained speed is doubtlessly below 1%. When the main contactor releases ic sets the AC input co "O" wich che result that the speed reference turns zero, too. 4.1.9 Measuring devices on the card: The card is equipped with two measuring devices in order co ease the Commencing of drive. One of them is a linearity measure, and the other 2 DC-mesory used at braking.T | | TACs SPEED CONTROL Taw 10 34 44 | FUNCTION DESCRIPTION i ! | Page: 17 \Dapes” Date [Compiled by Checked by Tapproved by 1 [HAT | 28.4.86/S Suur-askola | I Lf' Issue: |niese i feet i i Linearity measure: For stopping accuracy it is important that the deceleration reference does not alter too much during deceleration. This, however, is difficult to detect without a recorder. Lf such is not available the following circuit (described below) can be used as a substitute. Function: The Q12 switch opens in the beginning of deceleration. This is due to the QI8 transistor comparator. The deceleration value will get stored in the C7 capacitor. At approaching the Landing (appr. 7 cm) che QlL svitch will also open by means of the M6q amplifier, and che deceleration value gets stored in the capacitor C6. The M3B comparator compares the voltages, which are displayed by LEDs Dé and Ds. when ene Linearity is correctly adjusted the deceleration increases a slightly in the other travel direction, and decreases in the other. At the time one of the LEDs is illuminated in one direction, and the other in the opposice direction. Due to delayed sampling the results can be studied only after che AC-LED goes off.(Dept. Dace [Compiled by Tehecked by “Tappraved by far © 2646.86/5 sourcaskole | 75 I { T 1 1 TACS SPEED CONTROL } ; | FUNCTION DESCRIPTION I i | { | 1 |LLe4e | Maa 7 ce ce &S Deceieration reference variables wher travelling in both drive diection rt eee cn CT capacitor voitege Correctly odjusted PERE ame eee cee The final value of C6 capacitor voltage is influenced by the drive. direction. When the mean value corresponds with the C7 capacitor voitage, deceleration is correctly adjusted LED D4 indicates one and LED 05 the other , drive direction fae Deceteration cecreases LED D5 is permanently iuminate, Deceleration increases The deceleration is incorrectly LED D4 is adjusted in both’ the above permanently cases itluminate. Fig. 9.I | TACS SPEED CONTROL | am 10 34 44 | FUNCTION DESCRIPTION | I | Page: 19 1 t [Depe. _Date [Compiled by [checked by [Approved by [af 28.4.66/5 Suur-Askola | > \ 4p +I tséue: 11 L64E \ I = | Do-meaory: In order to prevent the motor from excessive pC-supply to the brake, the highest braking current must be known. Thus @ DC~semory has been added on the regulator card. The DC-memory will store the highest braking value reference at braking. Function: For as long as SA is "1", the Cl6 capacicor voltage is zero. This is due to the influence of D26 diode. When the SA input changes co "0", C16 can become charged with as high positive voltage as the increase of the MILA brake regulator voltage permits. The R67 resistor is responsible for charging. When the car arrives at a landing the M6A termination circuit for calculation changes negative, and with the aid of che D39 diode prevents che C16 capacitor from becoming charged. Thus che peak value at braking remains in the memory of the Cl6 capacitor. The Ql3 transistor is used for strengthening the measuring result. The car must be driven in the more demanding drive direction, so that the highest voltage recording would become known. When the measuring result has been received, tie R8 potentiomerer is adjusted with @ value which is higher chan thar of che above (approx. 1.5 V). Thus in a case of a failure the braking coil current does no increase excessively. SA MEA MMA cre Fig. 10.{ r 1 | Tacs SPEED CONTROL awtng aden | FUNCTION DESCRIPTION 1 I \ i t | | | Page: 20 \Dept. -Date Compiled by Tchecked "by Tapproved by Nee Mar” 28.4.8618 saurcaskole | | hE | tsue: | L164E, | I _~ | | 4.2 Firing card 42 Block descriptions: AMPLIFIER LDENTLF 1CATION FUNCTION DESCRIPTION al Regulator Keeps the -15V supply voltage a constant. 7 Regulator Keeps the +19V supply voltage a constant. 2 Window comparator Forms a positive pulse always vhen the main supply voltage is at zero. e as/ll, Zero setting Discharges the Cl1-C14 capacitors, we which form sawtooth waves when the window comparator gives a positive pulse. 6 Comparator Compares the saw-tooth wave and the firing reference (AL, DC) by giving negative voltage when the thyristor aust be fired. Mé/a Oscillator Forms the high frequency required by the firing transformer. 3/15, 16, 17, Pull down Makes the power stage transistor 18 base negative, which disconnects the firing current. QI, Qz, Q3, 4 Power stage Supplies the firing transformer : 8/7 Phase failure Checks that the net phases are there. supervision This prevents the Lift from starting on two phases. B/G Tachovol tage Transforms the tachovoltage so that ic converter corresponds with the voltages used in electronics. 9/1 RD input Changes the level of input signal. 8/1 Absolute value Gives a negative voltage, provided, the polarity of the voltage from the tachometer is correct. 12/8 Auplifier Amplifies the tachometer voltage so : that it can be observed. 49/7 Tachovoltage Checks whether there is any detector tachovoltage, and whether the polaricy is correct.! T hs | TACS SPEED CONTROL, 1 aM 10 34 44 | FUNCTION DESCRIPTION I i | Page: 21 (Depts Dare ICompiied by Tchecked by [Approved by “I Inst 28-64-8615 Suur-Askola = | a> i Wt | Issue: (1164e {| i I H9/14 Activation of Indicates when the cachovoltage needs Supervision supervision. Ie aust be done when the lift is either on normal or on service drive. 10/8 Tacho voltage Uses the tachovoltage detector, and Supervision the activation ability to detect the presence of tachovoltage. 10/7 Supervision VR output is "0" provided: Advance opening ni 14 Limit m11/8 Stopping Delay 49/8 HA Input n10/14 WA Delay MLos1 Service drive reference mi/7 Supervision of Service Drive 16/8 TA Input 46/7 TA Delay and Pulse M1214 Inverter - che power supply phases still exist and - the service drive has not lasted too long and - the tacho supervision is convinced that the speed is correct and - the car does not overspeed. indicates when the car speed is less than 0.3 m/s, and the advance opening can start. The V03 output is "0" when the speed is less than 0.3 m/s. Indicates when the car speed is less than 14 in comparison to the nominal speed value. When the speed sinks below 1%, the car is given time to stop before removing the thyristor firing. Modifies the input signal level. Forms a aelay required by brake when the service drive start. Forms a speed reference for service drive Calculates the time consumed by the service drive, and informs the supervision if a continuous drive exceeds the time considered safe for sotor. Modifies the input signal level. Forms the required brake delay vhen relevelling starts, and gives a DC~pulse €o che motor when the relevelling is over. Modifies the Mé/7 polarity to suit the zero setting of the firing circuic.\Depe- ina | ewe “Date M6/1 Mo/ 14 i2/1 1; T Tacs SPEED CONTROL Trine ue FUNCTION DESCRIPTION | | Page: 22 [Compiled by Tohecked by Tapproved by lige erteb6ls SuuerAskola | 72 ! I Issue: — i 1 TA Attenuator Forms an attenuating DC-current to the motor when relevelling starts. As a result the start is very smooth. TA Limiter Restricts overspeed that may appear during relevelling, by increasing DC supply in relation to increasing speed. TA Controller Forms a spead diftereace reference on basis of a relevelling reference and the actual value of speed. The speed difference value is connected to the regulator which situates on the regulator card. Thyristor control: The thyristor firing is synchronized co match the sine wave of the main power supply. This is done by the window comparator aad the resetting circuit. Each time the main supply voltage is in zero the capacitors C11, C12, C13 and C14 are discharged. Because the main current circuit is 3-phased, there must be three synchronization circuize, too. The firing of tie braking bridge is synchronized by the fourth capacitor (C14). After discharging the capacitors are recharged. This is how the saw cooth wave pulsating in phase with the main supply voltage, is formed. The voltage (AL) received from the torque regulator is compared with the above saw Cooth voltage. The higher the AL voltage the longer che output of M4 circuit stays negative. When M4 is aegative the down pull circuits (43/15, 16, 17, 18) are aot conducting, but the power stages are. When the power stage is conductive the pulse transformer feeds the thyristor gate, and the thyristor is conductive. Because the pulse transformer cannot feed the gate during the entire firing, the pulse transformer supply is interrupted in phase with the M8/8 oscillator. The zener diode (12), placed in parallel with the pulse transformer on the RC-card, discharges che energy which has accumulated on the magnetic field. This happens when the power stage is not conductive. This procedure prevents the transformer from getting saturated. The resistor (LOR) on the secondary side determines the current fed Co the gate.! 7 7 T | | TACS SPEED CONTROL | aM 10 3444 | | FUNCTION DESCRIPTION | i | | Page: 23 I \Depe- Date [Compiled by Tchecked by 1 I Vat 26.4-8615 Suur-Askole = | 7 | Issue: I [1164 | I | I ur ° M2i7 ° ao + AL regulat Capacitor mere L il Mare | Fig. ll. Fig. 12aoe aes eae | FUNCTION DESCRIPTION \ | 1 [ page: 26 | | i \Dept. Date [Compiled by Tohecked by Tapproved by =| HAT 28.4,86{S Suur-Askola | RP | kL Issue: [1164 i . ! a i LH | 4.2.3 Supervisions The TACS firing card houses the following supervisions: - Phase failure supervision (H8/7) = Tachovoltage supervision (H10/8) = Supervision of service drive time (MI1/7) - Overspeed (R84, R83) If one of the above supervisions is positive the M10/7 output is negative and the Cransistor M5/12 is not conductive, Phase failure supervision: Impedance C37 R117 has been chosen so that its magnitude is equal co Rig, and che phase angle between the current and the voltage is 60°. With these facilicies, and on basis of the rotation direction, the voltage u either stays in zero or behaves like Ul, except the polarity is reverse. Fig. 13 shows the voltage vectors when the rotation directions vary. when the phase order is wrong the voltage u is as shown in the figure below. ag SNe! | TACS SPEED CONTROL I aM 10 34 44 | FUNCTION DESCRIPTION I Page: 25 | | Depr. Date fe by (ences ‘by eee by 7 JHAT 28.4.86/S Suur~Askola Issue: |at64e 1 ete I l Tachometer supervision: The purpose is to detect whether che polarity of the tachometer voltage is correct, and whether there is any tachometer voltage. When the life stares, ive the ACL curs negative, che C22 capacitor voltage begins to decrease. If the tachovoltage detector M9/7 detects the voltage being released, ice., the M8/1 voltage is less than -30aV before che C22 capacitor voltage has dropped to zero, the supervision circuit 10/8 stays negative and allows the drive to go on. If the €22 capacitor voltage has reached zero the M10/8 changes positive. Due co the influence of D2, R142 circuit the M10/8 remains constantly positive preventing the lift from starting. This kind of situation is possible, for example, if the tacho belt ruptures. ° os 10 —+__- vw Oe us 20 f 4 ‘ -sot | : -60 7 - ' Utache fay! ' acy J 9/16 9/7 1 1 i ‘ 1 ' staat bs sof § t Ver v ‘ ft 1 of : = | Tstant wax : Big. 6.H T | TACS SPEED CONTROL Taw 10 36 44 | FUNCTION DESCRIPTION i 1 | Page: 26 [De,<. Dace [Compiled by Téhecked by Tapproved by 7 Al THAT | 28,4.86{S Suur-askola =) yy I LP toa: (Lies L i cas i 2 I Supervision of che service drive tine: The purpose is co control chat che motor does not get overloaded due to too long coneinuous service drive. The M11/7 functions as a supervision circuit. The drive time and the pause are determined by C27, R135 and R136. Also che volcage ac M11/5, has an effect. Overspeed supervision: When the eachovoltage exceeds its nominal value by 10% che 410/7 turns negative preventing the lift from travelling. The control limits are determined by the R&3 and R44 resistors. 42a Scopping: When the speed decreases to less than 1% of its nominal value che M11/1 output changes negative. The circuits R159, D100 will ensure Chat the MI1/1 output does not vibrate. The mechanical brake is released by the LR output. However, because the mechanical brake is, slow (che delay being from 100 to 200 ms, approx.) the influence of thyristor firing is continued for as long as che delay caused by R93 or C24, lases. This is an attempt to minimize the speed so chat the brake closing is smooth. Whea the MII/8 turns negative, the firing is discontinued by NOk-signal. In order chat the life cime of main contactors would be as long as possible, the contactors are released after the NOL-signal has disappeared. 1 I 1 i ' ! Iabel Duty: The mother board consists of: ' | TACS SPEED CONTROL 1 AM 10 34 44 | SUNCTION DESCRIPTION i | | Page: 27 (Depe. Date [Compiled by Tehecked by TApproved by 1 IHAT ©. 28.4.86]S Suur-Askola I R. 1 1 Issue: HL164E. i Les i | uly 3 mae 5 1 ' ~~ nour 4 mane i ' t rod Mechanical : ae brake Peete ~ Fig. 15. 43 Mother board = Connectors for the regulator, and the firing cards with the intermediate wiring. - Filtered inputs for SA, SB and AC. - Relays VR, VO3, LR and KP. ~ Firing circuit fuse fl. - Terminals for input and output connections. 1 ! ! i I | 11 T | TACS SPEED CONTROL | at 10 34 4a | FUNCTION DESCRIPTION | i Page: 28 i {vept. Date [Compiled by Checked by jaerrares by 1 |HAT 28.4.86|S Suur-Askola | Zz | [i64e 1 Hane I | Issue: 43.2 Version varibles Iwo mother board versios: 1, Without relays VR, VO3, E& and KP. In this version the control is in charge of the contactor delayed release (relay KP, delay R10, C4). The type is 357463 GOl. 2. Includes all relays, The type is 357463 G02. 44 Power electronics 44d Regulation principle 3 a ne | winaing | Lod Pig. 16. The thyristors Tl...16 are energized to accelerate the motor. The thyristors T7 and T8 are energized to decelerate the motor. The torque is adjusted by varying thyristor firing times. As a result that a two coil motor allows the simultaneous use of both coils, the dead band has been minimized. This has deen realized with the R36 resistor on the regulator card. An aleost linear change from acceleration to deceleration, is thus achieved. 1 I 1 | 1 | |I | TACS SPEED CONTROL | FUNCTION DESCRIPTION 1 {Depe. bate [Coapiled by Tohecked by Tapproved by lust 28.4.8615 Suur-Askola = | py 1 [Lede | ! = | Torque driving t 4d 2 AL Regulation voltage Fig. 17. Thyristor characteristics The thyristor is like an open switch when the gate is de-energized. When the gate is re-energized it becomes a diode. Anode Gate ee Catoge a Fig. 18. After a thyristor has been energized it does not get de-energized before the current flowing chrough drops to zero. Normally this . happens when the supply voltage polarity changes, i.e., che diode becomes non-conductive. A gate pulse is necessary for its re-energization.Beyer pave [Goapiled by Tohecked by Tapproved Ep 1 | Issue: [MAT | 26.4.86|5 Suur-askola | 7 1 ! |1164e | { i ‘ i | 1 | TACS SPEED CONTROL . | au 10 34 44 | | FUNCTION DESCRIPTION I | I I page: 30 | I! In TACS control system the gate pulse is initiated by a pulse transformer. To ensure energization the gate is fed with a serie of pulses which lase the entire conduction phase. 6.4.3 Thyristor protection The thyristor has a few restrictions, and therefore a protection is needed: L. Overvoltage A high voltage over the thyristor energizes it without any gate pulse. This kind of voltage peaks are rather rare (naybe once a month or year), but when it occurs the bridge formed by 17 and TS, may get damaged. Therefore this bridge is protected with a varistor, which prevents an excessive increase of voltage. 2. Excessively increasing voltage Lf the voltage in the forward direction of the thyristor, incteases too rapidly the thyristor may get energized involuntarily. Tne voltage increase is limited with a resistor capacitor (RC) circuit. Fig. 19. ho Thyristor Circuit/Trouble shooting The braking circuit thyristor failure is usually traced through a fuse failure, but a thyristor failure in the acceleration circuit is aore difficult to trace. Trouble shooting can start as follows:T { TAC5 SPEED CONTROL . 1 AM 10 36 44 {| FUNCTION DESCRIPTION | ! | page: 31 \Depe. Date TCoapiled by Tohecked by Tapproved by 1 [WaT | 28.4.86]S Suur-Askola i | Ab +| Issue: jn6ae i L 72 I \ Fig. 20. Normal drive (full speed): Measure the voltages (volt-ohm meter, AC-range): AnD B-E c-F These voltages aust be approx. 1V. If one of them is not approx. 1V, it is advisable to change che module. Check the firing if no positive results appear. On service drive: Measure the currents (current probe, AC-range): D £ F The above values gust be equal. If the current values differ it is advisable to change the aodule with highest current, first. If the currents, after the modules have been changed, still differ it may be that the thyristor firing pulses are not correctly synchronized in relation to the main power supply. Then it is necessary co use both an oscilloscope and a current probe. Connect them as shown in Fig. 21, and drive the lift car on service drive speed.I ONE | TaCS SPEED CONTROL | AM 10 34 44 a) | FUNCTION DESCRIPTION \ | | page: 32 |uepes Date [Compiled by Tohecked by Tapproved by i [Hat ” 28.4.86[5 Suurmaskola = | | & | Tesue: 1 1L64E | | = | a | Terminal Thyristor Current probe ~ Resistor i Yon The pulse train must_ end _ Shortly before supply voltage goes to zero / Note | Orive on service speed! i Vories according i to torque consumption : cer ei Perera Fig. 21. If the pulse train does not discontinue shortly before approaching che zero point of the main power supply (n. 20°), interchange the secondary coils for the supply transformer, and continue until the pulse train of each phase is as shown in Fig. 21. Wake sure that the value of a single pulse is approx. 300...500 mA, and that the gate is more gosicive than che cathode.| | TACS SPEED CONTROL 1am L036 ay {| FUNCTION DESCRIPTION I 4 | Page: 33 |Dept. Date [Compited by Tohecked by Tapproved by THE TWAT 28.4.8615 Suur-Askola | 7 I he Issue: nese 1 ! 1 Sal a Service drive The MLO/14 changes negative within 0,ls after the service drive push button has been energized. Before starting there is a delay to confirm brake opening. The R147, C33 circuic smoothens the jerk at the start by a slow increase of 10/1 reference. The service drive reference is connected through Do4 to the regulator card. This regulates the motor torque until the voltage from the tachometer corresponds with the service drive reference in the same fanner as during a normal drive condition. The tachometer is under supervision during the service drive, too. This is realized with p49. The DY diade prevents the relevelling signal effect, if such should arrive. The M11/7 supervision circuit prevents a too long, continuous drive in order to prevent the motor from any possible damage. The M11/7 has an influence on the VR output through R140 and D78. - The tacho voltage supervision is prevented by D79 if the service drive lasts too long (Mli/7 is positive). The M10/1 reference vill become zero immediately after the service drive push button is released (no snoothenings). Lé the service drive push button's release de-energizes the main contactors, and the brake, the zero reference value has 19 significance. The stopping can be realized with electronics, too, in which case the braking is realized with DC-current. The brake closes only after the value drops below che 1% limit. Relevelling When a command for relevelling has arrived the M6/7 (TA~delay and pulse) become negative in about 0.1s. The delay ensures that the brake opens before starting of a drive. An individual controller w12/1 is cequired because the relevelling speed is very low (approx. 2 cm/s). This regulator is integrating, which means that the motor torque is increased for as long as the correct speed and direction are achived. M6/8 gives the speed reference with the resistors R155, R154 and RIS3. M8/1 gives an actual value with R152. ‘The speed difference reference formed by the M12/1 regulator is lead to the regulator card through D65, which as during a normal drive condition, regulates the motor torque until the voltage from 7 tachometer corresponds the specd difference reference given by MI2/L.I (Dept. Date ICompited by Tohecked by Tapproved by 1 iwaT " 28.4.86/S Suur-Agkola | | | Ts3u 1L64e, | i i i The relevelling is special in a sense that the motor is given a DC-pulse (approx. O.1s) both at starting and at stopping. The aim is to attenuate vibrations due to changes. The pulses are given through AB terminal to MIA, which is housed on the regulator card. Figure 22 shows how the AS signal is formed. The duty of the M6/1 is to decrease the DC-current smoothly until attaining zero within 1 s (approx.) from the scart. The purpose of the TA~limiter (M6/14) is to increase the DC-current to the motor, if the speed exceeds the 1-54 Limit in comparison to the nominal speed. The operation range is determined by the 025-028 diode briage. 1 T i i | tacs PEED conTkoL [egtnotsatiaetl | FUN¢TON DeseKLPTION | | iu | I | i 68, R107 prevents the 1% limit (ML1/1) from functioning, because it could drop the main contactors without @ reason. D12, R108 drops the main contactors (through L&), ana prevents the thyristors from firing (woL-signai) as soon as the felevelling is over. D48 prevents the effect of the service drive signal during relevelling, if such should arcive. There is no tacho control during relevelling-t T | TACS SPEED CONTROL 1 AM 10 34 44 | FUNCTION DESCRIPTION t 1 1 1 | (Page: 35 | 1 | i \Depe- Date [Compiled by [checked by Tapproved by q A | [HAT 28-4.8618 Suur-Askola = | i AS “| Issue: ipbtan 1 I 1 | ° 1 2 3 el [BSc ees “10 6 ceesseeeeeeeeee ee eee eee vot MeIT as 1 Fig. 22TACS LIFTS [Depe. COMMENCING OF SPEED CONTROL AM 10.34.39 Page: 1 Issue: {Ee 2.1 Date [etree by Checked py, TApproved by [WaT 04.03-85|Timo Lehtonen | pat hit yt I | eee = T i ! i tt t 1 TACS is a Lift speed control system developed on the basis of TAC3. Both systems have the same input and output connections. At TACS, it is also possible to choose between an electronic or a relay output. The controller card 57212G01-G04 of TAC5 is similar to that of TAC3. Therefore, the instruction aM 10 34 17 for commencing the TAC3 can be used also for Tacs. The only difference of these systems effecting on the commencing is the service drive speed. At TAC5, the service drive speed is constant and the durance of an uninterrupted service drive is limited to approz. 30 s. The service drive speed is adjusted to the correct value by means of the jumper X3 situated on che firing card 357315G01-GO3. The jumper has to be in the position "1" at nominal speeds of 0,8-1,25 m/s and in the position "2" at the nominal speed of 1,6 m/s. The jumper X2 situated on the firing card 357315G01-G03 has to be in the position "1" at nominal speeds of 0,8-1,25 m/s and in the position "2" at the nominal speed of 1,6 m/s. This jumper is used to adjust the speed measuring of 0,3 a/s (V03). Adjustment points of the controller card 57212G01-G04 DO NOT DETACH THE CARD FROM THE RACK BEFORE SWITCHING OFF THE MAIN VOLTAGE. Notice! The expansion card marking is HKEP209. Location of adjustment points SA OFF B30 {58 ON 5 i ac D Jinc © |oec 43 23 2313 ok « °8/ +813 +723 oN fal x2 OFF BaaEaDD 2SREREf POSE (ssc | COMMENCING OF SPEED CONTROL | \Dept. “Date |Compiled by “Tehecked by, TApproved by IAT "04.03.85]7in0 Lehtonen | HE (Ade; | le i Se Ss 11 2.2 LEDs are Lit, when sa The Lift has not reached the 2 m deceleration point (in 603 and 604 types only) SB ‘The Lift has not reached the 1 m deceleration point ac Normal drive ine Deceleration increases DEC Deceleration decreases 23 Potentiometers RL Adjustment of the acceleration _) seceleration decreases CG Acceleration increases R2 Levelling accuracy (+ 2 cm) » Shorter braking distance RS Levelling accuracy (+ 8 mn) _) Shorter braking distance Ra Adjustment of the start Cc The starting torque increases RS Deceleration linearity Turn), if BED INC is Lie Turn 3) » if LED DEC is lit R6 Adjustment of the deceleration The deceleration increases and the hitch at the beginning of the deceleration decreases CMe decelezation decreaseo and the nisen at the beginning of the deceleration increases RT Adjustment of the deceleration of a one-floor run 2D Deceleration increases G necetaration decreasesI | Tacs LirTs | AM 10.34.39, | COMMENCING OF SPEED CONTROL t | | Page: 3 : Eh [Dept. Date (Compiled by Toheqted by Tapproved by [hat peace ae ates Lehtonen Iie ia L Issue: \ R8 Adjustment of maximum braking voltage i) Voltage increases 2 Switches (position ON) ‘Ke 2C-braking at the start ~ Zemoves the effect of 1 m deceleration point 2.5 Measuring points u/3 Speed reference 2/3 Deceleration reference 3/3 Firing reference of the driving thyristors (high speed winding) 43 Firing reference of the braking thyristors (low speed winding) 3/3 Maximum limit of the braking volrage 6/3 Menory of the maximua braking voltage 73 O-level of the electronics 3 Adjustment o£ normal drive (empty car) Measure all volrages against the O-level of the electronics (MP7/3). The voltages to be measured are DC-voltages within the range of 0...10V. 3a Switch X2 to the position OFF. 3.2 Adjust the potentiometer R4 so, that the voltage at MP3/3 = 6,0V, 3.3 Adjust RB so, that the voleage at HP5/3 = 7,0. 34 Adjust R7 so, that the deceleration of the one-floor run is at its minimum (look at the point 2.3), 35 Adjust Rl so, that the acceleration is 3/4 of its greatest value (look at the point 2.3). Adjust Rl, when the lift stands at a floor. 3.6 Ig the controller card is 57212G01 or G02, go direct to the point 3.10. 3.7 Switch X3 co the position ON. i 3.8 Drive the lift two floor distances in both directions and adjust the potentiometer R2 so, that the lift stops precisely (+ 2 cm).! T | Tacs LIFTS | AM 10.34.39 : COMMENCING OF SPEED CONTROL Page: 4 i pt. Date Tesapited by ~ Hie scked ch Tarroves by 1 lua ‘04.03.85|Timo Lehtonen gle | tesue: [ue | | 3.9 Switch X3 to the position OFF. 3.10 Drive the lift two floor distances in both directions and adjust R3 60, that the life stops precisely (+ 8 am). 3.11 Drive one floor distance in up direction end adjust R6 60, that @ hitch can be felt in the car at the beginning of the deceleration. Then turn R6 back just a little so that you cannot feel the hitch anymore. 3.12 Drive the lift two floor distances in both directions and adjust R5 60, 3.14 3.15 3.16 719 4.5 Se that the deceleration increases in one direction (INC is lit) and decreases in the opposite direction (DEC is tit). Read LEDs INC and DEC immediately after LED AC has gone out. Re-adjust the levelling accuracy as shown at the point 3.10. Renadjust RS as shown at the point 3.12. Connect the V-meter to the measuring point 4P6/3- Drive the lift in the up direction (two floor distances) and read the highest value of the V-meter. Adjust R8 so, that the voltage at MP5/3 is 1,5 V higher chan the valve received at the point 3.16. Adjust R8, when the lift stands at a floor. Adjust R4 so, that the motor rolls back approx. 3 cm, measured from the hand wheel circumference, vhen starting to the down direction (with an eapty car), Make sure that you cannot feel this movement to the wrong direction in the car. If the motor does not roll back at all or the movenent is too small, the start in the up direction can be bad (the starting torque is too high). If the start is too hard, switch X2 to the position ON. The position ON gives a better start, but it is recommendable to use the position OFF, if the start is cufficiently good at it, since there is less motor heating and less noise at the start in this position. Final adjustment Adjust the acceleration by the potentiometer Rl and the deceleration by the potentiometer R6 according co the requirements set to the run of the lift. Connect the V-meter to the measuring point MP 6/3. Drive the lift two floor distances in the down direction and read the highest value of the V-meter. Drive the lift one floor distance in the down direction and adjust R7 60, that the highest value of the V-meter is 0,5 V lower than the value Feceived at the point 4.3. This way, the deceleration will be the same in the one~ and two-floor run. Check from the car that the lift stops precisely.| Og | puncttow nescetetion of a¥s200 + 7425 - | i \Depes Date Woupiled by Tchecked by “Taeproved 1HAT 17.12.86|Luonuansuu t ' 227 I ae i LIST OF CONTENTS L GENERAL 5 1.1 Range of use 5.1 1.2 Adaptacion between che computer and 5.2 ocher Life devices 53 5.4 5.3 5.6 2 COMPONENTS AND THELR OUTLES 5.7 « 1 PC-boards +2 Contactors and relays 3 Switches and push butcons Otner aevices 3 SIGNALS BETWEEN THE COMPUTER AND TAS From the computer to TACS From TACS to the computer 4 SAFETY DEVICES AND SUPERVISIONS Supervisions carried out by TACS Motor protection Safety circuit Supervisions carried out by the computer & ss DRIVE MODES Normal drive Correction drive Synchronization drive Service drive Return drive Reievelling Supervision of drive with open doors INSTALLATION AND MAINTENANCE TOOLS Maintenance card MCC85/MT Voltage tester card NCC85/VT\ T | ! 1 | Page: 2 \Deprs Date [Compiled by Tenecked by Tapproved by Ate JHAT 17.12.86] Luonuansua 1 | | seus: (12278 I | | 1 GENERAL, TMS 200 see am 10.10.11 TMS 200 is a microcomputer based life control system, which is progcammed according Co different drive and control functions. The computer coaprises among others a processor cara incluaing the microprocessor and program memory circuits, extension cards and adapter cards. ‘There are 32 input and 32 output terminals on che processor card. This amount is not always sufficient, but extension cards are needed, which are provided with the same amount of terminals as the processor card. The input/output voleage of these cards is 24VDC. This means that they can neitner control, for example, 220VAC contactors directly, nor receive signals of the 220VAC level. For the aaaptation, che system is proviaed wirh the saapter caras ADPTO and ADPII. There are tyiacs on the ADPTO card, which are connected te che zero point. By means of the triacs the valtage is connected co the 220VAC aevices. ‘Ine ADPTL cara 1s provicea with eptoisolators, waicn transform the 220VAC voltage to the level of 24VDC. Tacs see AM 10.34.44 TaCS is a chyristor controlled drive for squirrel cage motors. The motor is a two speed AC motor. The high speed winding of the motor is supplied with AC voltage regulated by thyristors and the low speed winding with DC voltage, also regulated by thyristors. The motor rotation speed is measured by a tachometer generator, which produces an AC voltage proportional to the speed. This provides the system with the speed and direction feedback needed for the motor control. When DC voltage is fed to the motor - in this case to the low speed winding ~ ecdy current braking is generated, which contributes to smooth and adjustable draking- During the acceleration, AC voltage is increased according to a specific speed reference. When the lift has reached ful} speed, the thyristors are in the fully conducting condition. In the beginning of the acceleration phase, eddy current braking can be used for a moment in order to make the start of rhe lift smooth as well. The full speed is determined by the nominal RPM of the motor. The deceleration starcs, vhen the lift reaches the rear edge of the deceleration vane fixed to the lift well wall. The intensity of the deceleration is determined by the deceleration reference curve. AC voltage to the xotor is reduced and the DC voltage causing the braking effect is increased. The deceleration is supervised by examining the tachometer voltage. Sy regulating che AC and OC voltage, the deceleration is kept in accordance with the deceleration reference cutve. When the speed has reduced down to approx. 1 Z, the mechanical brake is released. After about 200 ms of the releasing of the brake, the motor contactors de-energize; the contactors energize and de~energize with no current flowing through them, which increases the contact lifetime.