द ण म य रे लवे

South Central Railway

म ट ड सि लनर जोनल े नंग इंि ट यूट - एस एंड ट कै पस
Multi Disciplinary Zonal Training Institute - S&T Campus
मौला-अल / सकंदराबाद
Moula-Ali / Secunderabad

Welcome to the Presentation on

DATALOGGER

R SRIDHAR
Instructor/MDZTI/SCR
 DATA LOGGER
2

(IRS: S-99/2006) 1. Data logger (32 bit Motorola 68000) is a

Microprocessor based system, which helps in
analysing the failures of relay inter locking
system (PI & RRI) / Electronic Interlocking
system (EI).

2. This is like a black box, which stores all the

information regarding the changes that take
place in relays , AC / DC Voltages and DC
currents along with date and time.

3. The same information / data can be

transferred to the computer to analyze further
“on line" / “off line” analysis of stored data
 Technical details:
3

(a) 24V DC Power Supply.

(b) Total Storage Capacity ….10 Lakhs events.
(c) Real Time clock with internal battery backup with data
retention upto 10 years
(d) 512 LED matrix to indicate the status of Digital inputs .
(e) Max Digital Inputs 4096.
(f) Max Analog Inputs 96.
(g) Digital Input Scanning Time is 16 millisecond
(h) Analog Input Scanning Time is less than 1 Sec
 ADVANTAGES OF
DATALOGGERS
4

1. Helps in monitoring the typical failures such as

intermittent, auto right failures.

2. It helps in analyzing the cause of the accidents.

3. It helps in detecting the human failures / errors such as :

(a) Drivers passing signal at Danger.
(b) Operational mistakes done by panel operators /
ASM’s of operating department.
(c) Signal and telecom engineering interferences in
safety circuits.
(d) Engineering and electrical department interferences /
failures
 ADVANTAGES OF
DATALOGGERS
5

v. It helps as a “TOOL” in preventive maintenance of

signalling gears.

vi. Networked data loggers help to monitor the PI/RRI/EI

remotely

vii. Failure reports can be generated remotely with help of

data logger network

viii. On line and Off line track simulation is possible.

ix. Speed of the train can be calculated.

DATA LOGGER
6
 DATA LOGGER
7

1. Digital Inputs:
Potential free contacts of relay ( front or back contact)
2. Analog Inputs:
Required voltage termination at control panel
3. Power Supply:
24 V DC power supply to the Data Logger
4. Communication:
Quad cable (4 wire)/OFC (voice/digital)
5. Documents:
Yard layout diagram for simulation
Route progression sheets
 Digital input wiring
8

Ground(N24V) is taken
from Data Logger and
connected to the arm
contact of all relays

When relay R8 picks up

C1/C2 contact makes,
circuit is closed and takes
10 mA and data logger
logs this event GND
DATA LOGGER
9
1st Connector - 1-64
2nd Connector - 65-128
3rd Connector - 129-192
4th Connector - 193-256
5th Connector - 257-320
6th Connector - 321-384
7th Connector - 389-448
8th Connector - 449-512 digital I/P’s

Expandable upto
Digital Tag MAX : 4096 INPUTS
Blocks
LCD DISPLAY
10

Relay name and its status

‘Front’ Contact – Relay pickup – LED ON

‘Front’ Contact – Relay Drop – LED OFF
 Analog Inputs Connectivity
11

All AC voltages through

AC-DC converter box

Fix AC-DC Box near

Power Panel only

Avoid entering of higher

AC voltages in to the DL
rack
Analog Inputs : 32
Expandable upto Max. Inputs : 96
DATA LOGGER
12
 DL-ID set up
13

Setting of Unique ID number for each DL

 Networking of Data Loggers
14

DATA LOGGERS IN NETWORK

 DATA LOGGER
15

Front End Processor…in network

FEP (Com1) will directly connected with computer

through RS232 cable
Uninterrupted power supply to the computer
Max distance between FEP & CPU is 100Mtrs
By using 3 serial data I/p ports (Com2,3 &4) will be
connected from 3 different stations DLs
 VARIOUS SOFTWARE PACKAGES DEVELOPED

16

Network management of Dataloggers

Reports Software

Online Faults

Track Simulation – Online/Offline

Equipment Reports

Train Charting
 Failure relating to operation
17

i. Wrong operation

ii. Choosing wrong sequence of operations

iii. Wrong reporting failure

iv. Delay in operating the signal gears

 Failure relating to Engineering Department

18

i.Failure due to creeping

ii. Failure due to stock /switch rail fittings, packing

 Failure relating to Electrical Department

19

i. Low/ high voltage

ii. Short circuit due to traction return current strip

iii. No electrical supply
 Failure relating to Signalling Department

20

Blown off circuit fuse

Signal Blank
Channel voltages of Axle counter is monitored
Failure of power supply to the equipments
Intermittent failure in relay contacts or high
resistance
Poor maintenance
 DATA LOGGER
21

If failure gets automatically set right:

A. Measuring all parameters

B. Operating the gears
C. Observing the gears
D. Doing detail investigation
 DATA LOGGER
22
Ready to Receive a Train
Station with no Train

Signal gone to Danger TPR Bobbing

without Train
 DATA LOGGER
23

• Automatic Train Tracking

• Automatic Control Chart Drawing CONTROL CHART (TC)
 DATA LOGGER
24

Abnormal incidences

i. Bursting of point

ii. Derailment of train

iii. Train accident

iv. Passing of signal in RED i.e. SPAD

 DATA LOGGER
25

EQUIPMENT REPORTS

Number of times a relay is operated, Station name, Signal name

 CPU
26

CPU Module has 16 ports for serial communication:

3 ports are dedicated to Display card, Serial printer, and

Memory card

4 ports are generally used as Answering, Originating,

T- Network port and Debugger port

6 ports are used for connecting Analog Scanner Cards

3 ports are used for Remote Terminal Units/Electronic

Interlocking system/Point machine health monitoring
unit /IPS.
 CPU
27

LED Indications for Processor Health Status

Three LEDs are provided on front side of display card to indicate the health status
of processor to the user.

Normally, all the three LEDs should be continuously ON.

1.Health LED indicates whether the 68000

processor has booted (started execution of
code) or not.

2. Power LED indicates whether power supply

to CPU module is ON or not.

3. Run LED indicates whether the 68000

processor is in running state or not.
 CPU
28

Sl. Health Power Run

No. LED LED LED Remarks

1 ON ON ON CPU module running normally

2 OFF ON ON Processor boot failed

3 ON/OFF ON OFF Processor is in halt state

4 --- OFF --- Power supply not turned ON.

Check power supply to Data logger
 DATA LOGGER
29

Digital Scanner Unit (DSU)

If we want to monitor more than 512 relays status then it is
required to provide Digital Scanning Units (DSUs) externally
to the Data logger system

These DSUs are required to be connected to the digital

input ports of Data logger system

Maximum 7 nos. of DSUs can be connected to the Data

logger system

Each DSUs is connected to digital input port of Data logger.

 MODEM CARD
30
Indication Description Light Information
indication
CTS Clear To Send On Modem ready to transmit
CD Carrier Detector On Modem is in Link
RD Receive Data Blinking Data is receiving
TD Transmit Data Blinking Data is transferring
OH Off Hook On Modem working, not hang

AA Auto Answer On Auto answer mode

RTS Request To Send On Request from DL for data

transmission
DTR Data Terminal On DL ready to send data
Ready
HS High speed On Off when line speed
< 9600bps
 MODEM CARD
31

The modem to line speed is 14.4 Kbps

Data logger to Modem speed is 57.6 Kbps

 DATA LOGGER-POWER SUPPLY
32

Voltage limits at DL Terminals: 24 V–28 V DC

Rating of DC–DC converter shall be

5 Amps upto 1024 inputs

10 Amps for 1025 to 2048 inputs

15 Amps for 2049 to 4096 inputs

 Signal Bobbing
33

The time difference between

ECR (UP to DN to UP) is in
between 500 msec to 2 sec
which should be taken as 1 count
1 COUNT

2 to 3 counts should happen

within 10 sec

2 COUNTS
 Track Bobbing
34
1 TPR 1 TPR 1 TPR
The time difference between
TPR (UP to DN to UP) is in
between 50 m sec to 1 sec
which should be taken as
1 count

2 to 3 counts should
happen within
10 seconds
2 COUNTS
 Point bobbing
35
The time difference NWKR NWKR NWKR
of (NWKR/RWKR)
(UP to DN to UP) is
in between
500 msec to 2 sec
which should be
taken as 1 count

2 to 3 counts
should happen
within 10 sec at that
time TPR is UP
2 COUNTS
 Point Failure
36

11NWKR 11RWKR
If NWKR, RWKR both
are down for more than
time interval then it is
point failure

Operating time: 3 – 5 sec

Operating time: 5 – 6 sec (TWS)
C (120 Sec)
 Track Circuit Failure
37
1 TPR 2 TPR 3 TPR

T1,T2,T3 are sequential tracks

a)When T2 is DN

b) T1 and T3 UP

c) The time difference between T1 UP ˃ 5 SEC

and T2 DN is more than 5 sec

d) The time difference between T3 UP ˃ 5 SEC

and T2 DN is more than 5 sec

e) T2 is not bobbing and is DN for

˃ 10 SEC
more than 10 sec C (120 Sec)
 Fusing of Signal lamp
38

When 110 V AC supply to signals has not failed

a) Yellow(three aspect):- After HR picks UP and DR is DOWN,

if HECR is not picked UP within 10 seconds

b)Green (three aspect ):- After HR and DR pickup if DECR

has not picked UP within 10 seconds

c)Red:- After HR/DR is DN, if RECR has not picked UP

within 10 seconds

C (120 Sec)
 Signal Blanking
39

When 110 V AC supply to

signals has not failed and all
ECRs are down ( i.e. analog
voltage value is used in fault
logic)
C (120 Sec)
 Signal Flying back to danger
40

When RECR is up continuously for

more than 2 seconds

In that condition if UCR is up

HR is down and signal replacement

track(TPR) is up then it is Signal
Flying back to danger
C (120 Sec)
 Timer setting more
41

The TIME difference between

JSLR UP and NJPR UP is
greater by more than 10% (more
than 132 seconds for 120
seconds timer) of the prescribed
time
 Point Loose packing
42
T1 T2

In Between two sequential TPRs Down to Up ( To ensure it is train

movement) if the status of NWKR or RWKR Changes more than 2
times ( Point operation not done ) then it is Loose Packing
 POINT NOT SET AGAINST OCCUPIED LINE-REAR END

1ST Loop

S1 SH 2 6
7 S3 13
MAIN

S5
8 14 S 20
S15 2 ND Loop

At the time of Point zone track(input1)(trig) up, Platform

track(input2) is down and track Before Point zone
track(input3) up and after time interval either of Other
Platform tracks(input4) are Up , HR is Down(input5) then
check the corresponding back end points.
 POINT NOT SET AGAINST OCCUPIED LINE-FRONT END
44
1ST Loop

S1 SH 2 7 S3 13
MAIN

S5
8 14 S 20
S15 2 ND Loop

At the time of Point zone track(input1)(trig) up, Platform

track(input2) is down and track before Point zone
track(input3) is Up and after time interval either of Other
Platforms tracks(input4) are Up and Starter HR(input5) is
down and Starter Control track(input6) is Up then check the
corresponding Front end points
 द ण म य रे लवे
SOUTH CENTRAL RAILWAY
सगनल व दूरसंचार श ण सं थान
Signal and Telecommunication Training Centre
मौला-अल Moula-Ali
45

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