M 8212X1
M 8212X1
Ch.3 F-FUNCTION
Ch.4 Application
                                               ─ 1-1 ─
1.2 General specification:
  Power                AC110V or AC220V ±10% 50/60 Hz
  OP. temperature      -10℃~+40℃ (+14℉~+104℉)
  Max. Op. humidity 85% relative humidity or less (non-condensing)
                                              ─ 1-2 ─
1.5 Interface specifications:
1. serial communication interface (standard)
     Method: half-duplex, asynchronous, Bi-directional
     Frame format: Start bit: 1 bit
                    Data bit: 7,8 bit
                    Stop bit: 1,2 bit
                    Parity bit: none/odd/even parity
     Baud rate: 1200/2400/4800 bps
     Data I/O mode: stream/command/manual/printing mode
2. RS-232C driver/receiver card (standard)
     Serial communication interface uses the RS-232C driver/receiver card for RS-232C data transmission
     application.
     Signal level: EIA RS-232C standard
     Transmission distance: 15m
3.   RS-422 driver/receiver card (optional OP-02)
     Serial communication interface uses the RS-422 driver/receiver card for RS-422 data transmission
     application.
     Signal level: EIA RS-422 standard. It also meets the signal requirements of RS-485
     Transmission distance: 1000m
4.    External I/O interface (standard)
     11 external output signals: open-collector output isolated with photocouplers.
     16 External input signals: Contact input or open-collector input isolated with
        photocouplers.
                                                ─ 1-3 ─
Ch.2 Panel description & Installation
Dimensions
                                        ─ 2-1 ─
2.2 Front panel description:
2.4 Installation:
  To mount the HB8212 into a panel:
                                             ─ 2-6 ─
2.LOAD CELL CONNECTION:
       4-WIRE CONNECTION:
‧6-WIRE connection :
3.General rules:
        Earth the HB8212 to the FG screw located on the rear panel
        Do not earth directly to other equipment
        The HB8212 has been selected to use a 110VAC or a 220VAC ±10%
        (50Hz/60Hz for each) power source before it leaves the factory
        The power input is marked on the rear panel. Please ensure that the local AC electricity
           power supply is fit for your HB8212
        If the local AC electricity supply fluctuates by more than ±10% an AC regulator must be
         used to stabilize the power supply
        Do not install the HB8212 in direct sunshine
        Avoid sudden temperature changes and excessive moisture
        The best operation environment for HB8212 is about 20℃/68℉ at 50% relative humidity
                                              ─ 2-7─
Ch.3 F-functions
There are a number of HB8212X1 functions that are selectable by the user.These functions,
called F-Functions, control many of the capabilites of theHB8212X1. Please take a moment
to look through all the F-Functions on the following pages.
‧ F-Function 0 : F0X
F-Function     Description                               Set Value
                                      Setpoints
F00            NEAR ZERO                                           00000.0
F01            FULL                                                00000.0
F02            PRE1       HiNi                                     00000.0
F03            PRE2       LoLo                                     00000.0
F04            FREE FALL                                           00000.0
F05            OVER       Hi                                       00000.0
F06            UNDER Lo                                            00000.0
F07            Tare set                                            00000.0
F08            UPER LIMIT                                          00000.0
F09            LOWER LIMIT                                         00000.0
                            CONTROL FUNCTION SETING
F10          WEIGHING MODE                               0:HOPPER CHARGE MODE
                                                         1:HOPPERDISCHARGE MODE
                                                         2:HOPPER DI MODE
                                                         3:CHECK MODE
F11          CONTROL MODE                                0:Simple comparison mode
                                                              Check pattern 0
                                                         1:SEQUENCE Control Mode
                                                              CHECK PATTERN 1
F12          CODE SELECTION                              0:INPUTKEYS
                                                         1:KEYS&EXTERNAL DI
                                                         2:KEYS&SERIAL COMM
F13          NEAR ZERO COMPARISON                        0:GROSS WEIGHT
                                                         1:NET WEIGHT
F14          OVER/UNDER(Hi/Lo) COMPARISON                0:GROSS WEIGHT
                                                         1:NET WEIGHT
F15          UPPER LIMIT COMPARISON                      0:GROSS WEIGHT
                                                         1:NET WEIGHT
                                                  ─ 3-8 ─
(7) Finish the setting:Press  ESC Key returns to the weight display
                         ┌─┐┌─┐┌─┐┌─┐┌─┐┌─┐┌─┐
       Display    │    ││    ││    ││5 ││0 ││0.│ │0 │
                  └─┘└─┘└─┘└─┘└─┘└─┘└─┘
                   ▽     ▽     ▼      ▽      ▼     ▽     ▽
                   ZERO TARE GROSS NET STAB       CODE FUNC
Ch.4 Application
4.1 Weighing Data Proceeding Control (F30~F41) :
F30 : Weight Unit
      HB8212X1 can be set the weight unit in kg, t, g, or lb via F30
F31:Display rate
         The display update rate of the HB8212X1 can be selected by the user via F31.
         For examlpe,if the display frequency is set to "0:5.00 times/sec.",then HB8212X1
         will display the data per four times A/D conversion.
1 2 3 4 5 6 7 8 9 10 11 12 13
  F32:Power-on zero:
          The HB8212X1 will automatically zero the display once at the AC power is connected, if the
          power-on zero function is valid, the user can select the power-on zero function to be valid or
          inhibited via F32
  F33: Zero range
          The HB8212X1 allows the user to press the (ZERO) keys to return the display to the center of
          zero when the weighing device is empty. This function works only if the offset value is within
          the set limit, which is called zero range, of the weighing device full capacity. The user can
          select a ZERO range via F33. The default value for the zero range is “0”: 2% capacity.
  F34: Zero tracking
    The zero tracking function automatically adjusts slow drifts of the zero point & slight shifting of the
    zero point due to a small amount of material left in a scale
         (1). Zero Tracking Method :
          If there is a small deviation, beyond the zero point, within a   set range and this state
          continues for more than a set period, the HB8212X1 will automatically bring the display back
          to zero.
         <2>. Zero Tracking Settings :
          The zero tracking range is denoted by the minimum scale division and the zero tracking period
          is denoted by the time in seconds.The default value for the zero tracking range and the period
          isx"5: 2.0 d/2 sec.".
F35: Stable detection:
          (1)Stable detection method:
            1. To compare the present A/D conversion data (DO) with several times A/D conversion
                   data (D1~DN) that in 1 second before.
             2. If the differences which are generated by each comparison are all within a set range and
                 this stated continues for more than a set period, the stable turns ON (▼STAB will be
                 turned ON)
              3. If any one of the differences is above the set range, the stable signal turns OFF (▽STAB
                  will be turned OFF)
               4. Stable detector of HB8212x1:
                         ↓
copmrasion D0 D1 D2 ─ ─ ─ DN
                          │   ↑     ↑         ↑
                          │  ┌─┬ ─ ┬─┬ ─ ─ ─ ─ ─                                ┬─┐
                          └─→│→│ → │→│   →    →                                 │→│→ Abandon
                     shift into       └─┴ ─ ┴─┴ ─ ─ ─ ─ ─                       ┴─┘
                                      ├─────── 1 Sec──────┤
                                               A/D Data Moving Buffer
            (2)Stable detection settings:
               The HB8212X1 needs the user to select a stable range and a stable period via F35 to
               perform the stable detection. The minimum scale division denotes the stable range and the
               stable period is denoted by the time in seconds. The HB8212X1 will be easier to enter the
               stable state if a larger stable range and a shorter stable period is selected, although the
               display may be fluctuant. The default value for the stable range and the stable period is
               “5”: 2D/0.5sec
F36:Digital filter
            HB8212X1 is designed to use the double stages digital filter to reduce fluctuation of a weight
            value. These digital filters are proceed by the moving average meth
                          D,F Inhibited stable signal OFF
                         ┌───────┐┌───────┐
                         │        1st stage    ││        2 stage     │
load cell     ┌──┐│ ┌────┐↓│                             ┌────┐↓
 ───→│A/D├┴→│                            D.F    ├─┴→│              D.F ├─→ Weight data prceeding
 Signal        └──┘                └────┘                 └────┘
                                  2-32 times          Stable signal ON 32 times fixed
      (1) Moving average method:
                                            n Data Moving Buffer
                      1 2 3 4 ─ ─ n-2 n-1 n
     New conversion┌─┬─┬─┬─┬ ─ ┬─┬─┬─┐
Data is shifted →│→│→│→│→│ → │→│→│→│→abandan
Into the moving  └─┴─┴─┴─┴ ─ ┴─┴─┴─┘
buffer            │    ┌─────┐    │
                      └────┤Average                 ├────┘
                                      └──┬──┘
                                            ↓
                                       To next step
      (2) 1st stage digital filter:
      The number of data to be average by the first stage digital more can be selected from 2 to 32 via
      F36.The display will be more stable if the number of moving average times increases, but the
      response will be worse instead.
      (3) 2ndnd stage digital filter:
      When the stable signal turns ON, HB8212X1 inserts the 2nd stage digital filter to restrain
      fluctuations of the weight value.
F37~F40 : Function keys control
           There are four function keys ([ZERO], [TARE], [GR/NT], [TARE RESET])
           on the HB8212X1 front panel can be inhibited via F37~F40 to avoid
           misoperation.
F41 : Auto Net Weight Display
           When the "Auto Net Weight Display" function is set on, the HB8212X1
           will switch to the net weight display automatically after a tare
           weight has been set, and to the gross weight display after the tare
           weight has been reset.
4.2 Calibration:
        Your HB8212X1 should be calibration when first installed, or after a weighing system component
         ( load cell, A/D circuit board,….etc.) has been changed. All weighing systems should be
         calibrated at least 30 every six months. Please allow a warm up (plugged in) for at least 30
         minutes to achieve thermal stability before starting calibration. For best accuracy, calibrate with
         as near to full span weight as possible.
Full Calibration Procedure :
      Step 1: Open the CAL switch cover on the rear panel and slide the CAL switch ON
      Step2:Setting Decimal place via (F60)
      Step 3: Set the minimum division via F61
             Minimum division can be set to1,2,5,10,20,or 50
     Step 4: Set the maximum division via F62
          The maximum capacity is the full weight that you want your weighing device to handle. This
          could be the rated capacity of the load cells, or some other limit you wish to set.
          The maximum capacity also has a relationship to the display resolution. In general, the display
          resolution of an indicator has the form of a ratio of the maximum capacity to the minimum
          division, The display resolution of the HB8212X1 can be from 300 to 12000. Thus,
                                         The maximum capacity
                        300≦                                             ≦12000
                                           The minimum division
Step 5: Proceed zero calibration via F63
          The zero calibration is a process to give the HB8212X1 a base reference point, “zero”, to
          the weighing when it has no weight on it.
       (1) Select F63 function
                         Guidance message
                    C    A    L      -             0
       (2) Make sure that there is no weight on the weigher and the weigher is stable(▼STAB lights
             ON), then press the (ENTER) key
       (3) If the input signal from the load cell is ok, the HB8212 will display (End- 0) message for 2
             seconds and the zero calibration will be done/
                    Guidance message
                    E    n    d      -             0
       (4) (ErrF631):
             If the input signal from the load cell is unstable, the HB8212X1 will display (ErrF631)
             message for 2 seconds then back to display (CAL-0) message to wait you to press the
             ENTER key for doing zero calibration again
       (5) (ErrF632)
             If (ErrF632) is displayed instead of (End- 0), the HB8212x1 is not able to achieve zero
             calibration because of the input signal from the load cell is negative
             Make sure that the load is not damaged the +SIG and –SIG are connected properly before
             you to re-calibration
       (6) (ErrF633)
             If (ErrF633) is displayed instead of (End- 0), the HB8212 is not able to achieve zero
             calibration because of the input signal from the load cell is too large(over 30mV)
             Make sure whether the load output is within the zero adjusting of the HB8212x1
Step6:Proceed span calibration via F64
       The span calibration function allows you to set a reference point between the empty point (zero)
       and the end point (Maximum capacity) of your weighing device that will give the HB8212 an
       algebraic difference of each digital increment (division). With span calibration, the HB8212 can
accurately calculate what the weights are on the weighing device
(1) Select F64 function:
                   Guidance message
            C     A    L     -    S        P   n
                   Guidance message
            L.    X    X     X    X        X   X
(2) Apply an actual load (balance weight) on the weigher
     For the best accuracy and linearity of the weight reading, calibrate with as near to full span
     weight as possible.
(3) Enter the balance weight value to the HB8212X1 and make sure that the▼STAB is ON, then
     press the (ENTER) key to proceed span calculation
(4) If the input signal from the load cell is ok, the HB8212X1 will display (End-SPN) message
     for 2 seconds and the span calibration will be done.
                   Guidance message
            E     n    d     -    s        p   N
(5) (ErrF641)
     If the input signal from the load cell is unstable, the HB8212X1 will display (ErrF641)
     message for 2 seconds then back to display (LXXXXXX) message to wait you to press the
     (ENTER) key for doing span calibration again.
     If the load cell input signal is unstable while doing the calibration, then adjust the settings of
     the Digital Filter (F36) and the settings of the Stable Detection (F35) before you to
      re-calibrate will be very helpful.
(6) (ErrF642)
     If (ErrF642) is displayed instead of (End-spn), the HB8212X1 is not able to achieve span
     calibration because of the input signal is too small. (under 0.6μV/division)
     1.Check weigher the load cell is properly loaded or check whether the load cell output is
       high enough to reach the span adjustment range.
     2.Adjust the minimum division and maximum capacity ratio- resolution. Make the
        resolution smaller
 (7) (ErrF643)
       If (ErrF643) is displayed instead of (End-SPn), the HB8212X1 is
      not able to achieve span calibration because of the input signal is too large(over 120μ
      V/division)
     Check whether the load cell is properly loaded or check whether the loadcell rated output
     falls within the span adjustment range.
     Adjust the Minimum Division and Maximum Capacity ratio
     Resolution. Make the Resolution higher.
         (8) (ErrF654)
               If (ErrF654) is displayed instead of (End-SPn), the HB8212 is
               not able to achieve span calibration because of the balance weight value has been
               mistakenly entered.
               1. The balance weight must not be entered as a value equal to 0
               2. The balance weight must not be entered as a value greater than the maximum capacity
               3. The balance weight must be entered as a value which is a multiple of the minimum
                  division.
     Step 7: Slide the CAL switch back to the OFF position and return the CAL switch cover to the rear
             panel
     ○
     (1 Weight reading calculation:
         Full digital span calibration is to set the span parameter equal to the original count from A/D
         converter of each digital increment of weight. Thus
       Sp=    Cn(Wt=Wb)-Zp
                    Wb
       Where Wb is the balance weight for calibration
2. Zero coefficient and Span coefficient:
    In order to get the characteristic of the A/D conversion of each HB8212X1, we developed two factors
   in HB8212X1. These are the zero & span coefficient. The original count from A/D converter is given
   by
                Cn(Wt=L)+L*Sc+Zc
    Where L is the loading weight, Sc is the span coefficient, and Zc is the zero coefficient.
3. Does not need re-calibration when HB8212X1 is replaced:
    consider the two HB8212X1 indicator A and B
                                         Indicator A              Indicator B
  The zero coefficient                     zca                         zcb
  The span coefficient                     sca                         scb
  The A/D conversion count                 cna(Wt)                    cnb(Wt)
  The zero parameter                        Zpa                         Zpb
  The span parameter                        Spa                         Spb
  The loading weight                        La                          Lb
  The weight reading                        Wta                         Wtb
  Wta=(Can(Wt=La)-Zpa)/Spa
  Wtb=(Can(Wt=Lb)-Zpb)/Spb
  Cna(Wt=La)=La*Sca+Zca
  Cnb(Wt=Lb)=Lb*Scb+Zcb
  If we set La=Lb=L
  Then. from equation(4.3-7) and (4.3-8)
              Can(Wt=L-Zca               Cnb(Wt=L)-Zcb
    L=          Sca                  =           Scb
          ﹛﹝Cnb(Wt=L)-Zcb﹞Sca/Scb+Zca﹜-Zpa
Wtb=
                               Spa
    =     Can(Wt=L)-Zpa       =Wta
                Spa
Thus, we can get the same weight reading of same load without RE-calibration when HB8212 is replaced
4. Summary:
(1).The zero and span parameters represent the characteristic of the weighing device. The zero and span
     parameters are set after the calibration functions have been proceeded
(2).The zero and span coefficients represent the characteristic of the indicator. The zero and span
     coefficient will be set to the HB8212X1 by Holbright at the time of shipping.
(3).F42~45 allow you to read out the Zc, Sc, Zp and Sp f
(4).F66~69 allow you to set the Zc, Sc, Zp and Sp to HB8212X1
(5).After HB8212X1 has been calibrated, the weight reading will be
     calculated by using the equation and the memory buffers will be cleared.
(6).Once the Zc, Sc, Zp, and Sp are set to the HB8212X1, the weight reading will be calculated by using
the equation
(1) F65 =0 (OFF)
4.4 Memory Reset (F56~59) :
    F56~59 allows you to set all the F-Functions of the HB8212X1 back to
    their initial settings.
    1. F56 : Data Memory Reset Function
          F56 is designed as a function switch to F57¡ãF59. F57, F58 and F59 will not be executed if
         F56 is set to "0:OFF".An error message [ErrF560] will be displayed if any one of these
         functions has been selected without setting the F56 to "1:ON". After any one of these
         functions has been executed, the F56 will be set back to "0:OFF" automatically to avoid
         misoperation.
    2. F57 : Reset Setpoints Memory
         All the setpoints for the FULL weight, PRE1 weight, PRE2 weight, FREE FALL weight,
         OVER weight, UNDER weight, etc. in the memory under the each code number (00 to 99) can
         be reset (or cleared) to 0 via F57.
    3. F58 : Reset Function Parameters
         The settings for F00, F08, F09, F10~F29, F30~F41 and F46~F55 are called the function
         parameters of the HB8212X1. These parameters can be reset to their initial settings via F58.
    4. F59 : Reset Weighing Parameters
         The settings for F44, F45 and F60~F69 are called the weighing parameters of the HB8212X1.
         These parameters can be reset to their initial settings via F59.
    5. Memory Reset Procedure :
         Step 1 : Open the "CAL Switch" cover on the rear panel and slide the
               "CAL Switch" on.
         Step 2 : Press FUNC
         Step 3 : Select F56 and set F56 to "1 "
         Setp 4: Select F57
                     Guidance Message
                 5       7.     R       E      S      E      t
                 or, Select F58
                     Guidance Message
                 5       8.     R       E      S      E      t
             or, Select F59
                     Guidance Message
                 5       9.     R       E      S      E      t
3. F-Function Setting
F00 : NEAR ZERO
            The NEAR ZERO weight can be set via F00. When the weighed value
            under the NEAR ZERO weight the DO NEAR ZERO turns on.
F01 : FULL
             The FULL weight can be set via F01. In the hopper charge
             weighing and the simple comparison control mode, the DO
             SP3 turns on when the weighed value over the FULL weight minus the
             FREE FALL weight.
F02 : PRE1 (HiHi)
            The PRE1 (HiHi) weight can be set via F02. In the hopper
            weighing mode (F10=0,1,2), the set value of F02 is called the
            PRE1 weight. In the check weighing mode (F10=3), the set value
            of F02 is called the HiHi weight.
F03 : PRE2 (LoLo)
          The PRE2 (LoLo) weight can be set via F03. In the hopper
           weighing mode (F10=0,1,2), the set value of F03 is called the
           PRE2 weight. In the check weighing mode (F10=3), the set value
          of F03 is called the LoLo weight.
F04 : FREE FALL
          The FREE FALL weight can be set via F04. In the hopper charge
           weighing and the simple comparison control mode, the DO SP3
           turns on when the weighed value over the FULL weight minus the
          FREE FALL weight.
F05 : OVER (Hi)
          The OVER (Hi) weight can be set via F05. In the hopper weighing
           mode (F10=0,1,2), the set value of F05 is called the OVER
           weight. In the check weighing mode (F10=3), the set value of
         F05 is called the Hi weight.
F06 : UNDER (Lo)
         The UNDER (Lo) weight can be set via F06. In the hopper
           weighing mode (F10=0,1,2), the set value of F06 is called the
           UNDER weight. In the check weighing mode (F10=3), the set value
          of F06 is called the Lo weight.
F07 : TARE
          The TARE weight can be set via F07.
          If F18=1 and a negative TARE weight has been set during the
           weighing by the external DI TARE command, the F07 function will
           be inhibited. The HB8212X1 will display that negative TARE
           weight after the the function-oriented key [7] has been pressed
           for the F07 function and will display [- tArE] message for F07
           has been selected under the F-Function operation.     If you want
           to   set a TARE weight value via F07, please press [TARE RESET]
           key first to reset that negative TARE weight value.
F08 : UPPER LIMIT
          The UPPER LIMIT weight can be set via F08. When the weighed
           value over the UPPER LIMIT weight the DO UPPER LIMIT turns on.
F09 : LOWER LIMIT
         The LOWER LIMIT weight canbe set via F09. When the weighed
          value under the LOWER LIMIT weight the DO LOWER LIMIT turns on
F10 : Weighing Mode
          F10=0 : Hopper charge weighing mode
           F10=1 : Hopper discharge weighing mode
           F10=2 : Hopper DI weighing mode
           F10=3 : Check weighing mode
F11 : Control Mode
             F10=0, 1 or 2 for hopper weighing mode
            F11=0 : Simple comparison control mode
            F11=1 : Sequence control mode
            F10=3 for check weighing mode
            F11=0 : Check pattern 0 mode
            F11=1 : Check pattern 1 mode
F12 : Code Selection
           F12=0 : Input Keys
           F12=1 : Keys and External DI
           F12=2 : Keys and Serial Communication
F13 : NEAR ZERO comparison
           F13=0 : NEAR ZERO comparison by Gross weight
           F13=1 : NEAR ZERO comparison by Net weight
F14 : OVER/UNDER (Hi/Lo) comparison
           F14=0 : OVER/UNDER comparison by Gross weight
           F14=1 : OVER/UNDER comparison by Net weight
           F10=3 for check weighing mode
           F14=0 : Hi/Lo comparison by Gross weight
           F14=1 : Hi/Lo comparison by Net weight
F15 : UPPER LIMIT comparison
           F15=0 : UPPER LIMIT comparison by Gross weight
           F15=1 : UPPER LIMIT comparison by Net weight
F16 : LOWER LIMIT comparison
           F16=0 : LOWER LIMIT comparison by Gross weight
           F16=1 : LOWER LIMIT comparison by Net weight
F17 : ZERO/TARE input condition
           F17=0 : All the time
           F17=1 : When stable
F18 : Taring Range
           F18=0 : + Gross weight (positive Gross weight)
           F18=1 : ± Gross weight (positive or negative Gross weight)
F19 : NEAR ZERO output condition
          F19=0 : Weight ≦ Setting
          F19=1 : |Weight| ≦ Setting
F20 : OVER/UNDER (Hi/Lo) output condition
         F10=0, 1 or 2 for hopper weighing mode
         F20=0 : At weighing complete
         F20=1 : All the time
          F10=3 for check weighing mode
          F20=0 : At judgment
          F20=1 : All the time
F21 : Auto Tare Function
           In the sequence control mode, if F21=1 and the DI START has
           been transited from off to on, the HB8212X1 will TARE the
           weigher automatically.
F22 : Control Output Selection
           F22=0 : Standard
           F22=1 : Signal Change
              After the F22 has been set to "1 : Signal Change", the pin20,
           pin21 and pin22 of the 25-pin connector for the external
           control I/O signals will be interchanged with the pin6, pin7
           and pin8 of the 9-pin connector.
25-pin connector :                                    9-pin connector :
20 Do error                                          6     Do ok
21 Do upper limit                                    7     Do over
22 Do lower limit                                    8     Do under
F23 : Weighing Complete Output
           F23=0 : After passing the Finish Timer
           F23=1 : When the weighed value is stable after passing the
                      Finish Timer
F24 : Weighing Complete Output (Judgment) Time
           F10=0, 1 or 2 for hopper weighing mode
           F24 = Weighing Complete Output Time
           F10=3 for check weighing mode
           F24 = Judgment Time
F25 : Inhibition Time
           F25 allows you to set a period to inhibit the weighing
           comparison after the DO condition has been changed during the
           simple comparison control weighing.
F26 : Finish Time
           F26      allows   you   to set a period to wait for the weigher being
           stable before the DO WEIGHING COMPLETE turns on.
4. Descriptions of Control DI :
<1>. DI CODE 80,40,20,10,08,04,02,01 : Level Input
          By Inputting the CODE number into the CODE inputs (2 digits BCD)
          the setpoints registered for the CODE number of 00 to 99 can be
          called.These inputs are accepted when the F12=1 and the DI RUN/START
         is given form off to on transition.
<2>. DI RUN/START : Pulse Input (pulse width should be over 200mSec.)
          Input as a start signal for the sequence control mode.
<3>. DI STOP : Pulse Input (pulse width should be over 200mSec.)
          Input as a stop signal for the sequence control mode.
          After the DI STOP has been input during a weighing sequence, all
          the DO signals will be set off except the DO ERROR will be set
          on and the [SE.Err 2] message will be displayed. By Pressing
          the [E.ACK] key on the front panel of the HB8212X1 will bring
         the indicator back to normal.
<4>. DI TARE : Pulse Input (pulse width should be over 200mSec.)
         Input as a tare signal to store the gross weight into memory and
          zeros the net weight. HB8212X1 will take the net weight as the weighed value to
          compare with all the set weights except those who can be selected by F-Function.
<5>. DI CHARGE/DISCHARGE : Level Input
         This input is valid only when the HB8212X1 is in the hopper DI
         weighing mode (F10=2).While the DI CHARGE/DISCHARGE is set off, the HB8212X1 is in
          the CHARGE control mode. While the DI CHARGE/DISCHARGE is set on,             the HB8212X1
          is in the DISCHARGE control mode.During the hopper DISCHARGE control weighing,         the
          HB8212X1 will take the ¢xNET¢x weight as the weighed value to compare with all
         the set weights except those who can be selected by F-Function.
<6>. DI ZERO : Pulse Input (pulse width should be over 200mSec.)
         Input as a zero signal to zero the gross weight.
<7>. DI GR/NT : Pulse Input (pulse width should be over 200mSec.)
          Input as a gross/net signal to switch between the gross weight
         display and the net weight display alternately.
<8>. DI TARE RESET : Pulse Input (pulse width should be over 200mSec)
          Input as a tare reset to cancel the tare weight.
5. Descriptions of Control DO :
   <1>. DO NEAR ZERO :
          The DO NEAR ZERO turns on when the weighed value under the NEAR
          ZERO set value.
          F00 : NEAR ZERO set value
          F13 : NEAR ZERO comparison
               F13=0 : NEAR ZERO comparison by Gross weight
               F13=1 : NEAR ZERO comparison by Net weight
          F19 : NEAR ZERO output condition
                  F19=0 :Weight ≦ Setting
               F19=1 : |Weight|≦Setting
  <2>. DO SP1 (DO HiHi), DO SP2 (DO LoLo), DO SP3 :
          F01 : FULL set value
          F02 : PRE1 (HiHi) set value
          F03 : PRE2 (LoLo) set value
          F04 : FREE FALL set value
          a. Hopper charge weighing, Simple comparison control mode
              Setting : F10=0 and F11=0 or,
                    F10=2, F11=0 and DI CHARGE/DISCHARGE=OFF
              Comparison : DO SP1 ON : NET ≧PRE1
                            DO SP2 ON : NET ≧PRE2
                            DO SP3 ON : NET ≧(FULL - FREE FALL)
          b. Hopper charge weighing, Sequence control mode Setting: F10=0 and F11=1 or,
                    F10=2, F11=1 and DI CHARGE/DISCHARGE=OFF
              Comparison : DO SP1 ON : NET < PRE1
                            DO SP2 ON : NET < PRE2
                            DO SP3 ON : NET < (FULL- FREE FALL)
          c. Hopper discharge weighing, Simple comparison control mode
              Setting: F10=1 and F11=0 or,F10=2, F11=0 and DI CHARGE/DISCHARGE=ON
              Comparison : DO SP1 ON : |NET| ≧ PRE1
                            DO SP2 ON : |NET| ≧ PRE2
                            DO SP3 ON : |NET| ≧ (FULL ¡Ð FREE FALL)
          d. Hopper discharge weighing, Sequence control mode
              Setting: F10=1 and F11=1 or,F10=2, F11=1 and DI CHARGE/DISCHARGE=ON
              Comparison : DO SP1 ON : |NET|< PRE1
                           DO SP2 ON : |NET|< PRE2
                            DO SP3 ON : |NET|< (FULL ¡Ð FREE FALL)
          e. Check weighing, Hi/Lo comparison by Gross weight
              Setting    : F10=3, F11=0 or 1, F14=0
            Comparison : DO HiHi ON : GROSS ≧ HiHi
                           DO LoLo ON : GROSS ≧ LoLo
         T0 : 200mSec. or More,
         T1 : Judgment Time (F24)
         T3 : Finish Time (F26)
   │          ││          │                          │                      │
   │ RXD- ┼┼──┬┴────────┴────────┘
   └───┘│     │
                └ RT ┘                                                  TWISTED-PAIR CABLE
                   120 Ω
                    Figure 4.9-1
   <1>. Figure 4.9-1 shows a typical RS-422 network of one to multi
    connection of the HB8212X1. A twisted-pair cable should be used
    and the signal ground (SG) should be connected to reduce the
    noise trouble and a terminal resistor of 120Ω[ might need to be
    used to reduce the distortion of the signal waveforms.
   <2>. A two digits RS-422 ID Number (01~99) should be set to each
    HB8212X1 via F51.
   <3>. The Data Output Mode should be set to the "Command Mode" to each
    HB8212X1 via F48.
   <4>. Stand-by State :
    When the AC power is connected, the HB8212X1 will be in the
    Stand-by State. When the HB8212X1 is in the Stand-by State, the
    RS-422 receiver is set ON and the RS-422 driver is set OFF. That
    is, the command can be received by the HB8212X1 but the reply
    will not be answered.
   <5>. Enabled State :
    After the "RS-422 Enabled Command" has been transmitted by the
    Host, the identified HB8212X1 will go to the Eanbled State and
    the others will stand in the Stand-by State.
    If the RS-422 ID Number has been set to 00, then the HB8212X1 is
    Always in the Enabled State which can be used for one to one
    connection.
    When the HB8212X1 is in the Enabled State, both the RS-422
    receiver and driver are set ON. That is, the command can be
    received by the HB8212X1 and a reply according to the command
    can also be sent to the host equipment.
S A 0       CR                                                             → HB8212X1
                                                                           S A 0   CR
Computer ←
    "SA1" Command : TARE Command
     S A 1         CR                                       → HB8212X1
                                                            S A 1   CR
    Computer ←