INFICON T-Guard Leak Detection Sensor Interface description - Manual (Page 34)

34
Profibus-DP Protocol
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5.2.2 Write Process Data (Leak Detector -> PLC)
This data is sent periodically from the leak detector to the programmable logic
controller:
Byte Bit Name Meaning
Similar to PLC
Output
Similar to RS232
ASCII cmd.
0 Error 1=Yes, 0=No ERROR
1 Warning 1=Yes, 0=No WARNING
2
3
4
5
Purge
0=inactive
1=active
6
7
0
1
2
3
4
5
6
7
2
3
4
5
6
7
8
9
10
11
12
13
14
Error / warning
code
Error / warning code *STATUS:ERROR?
*MEAS:FILTER? Sensor current Sensor current in A
Recorder output
(CUR_LIN,
CUR_LOG)
Pressure in mbar
Recorder output
(P1)
Actual leak rate in mbar*l/s
Recorder output
(LR_LIN,
LR_LOG...)
Leak rate
(mbar*l/s)
Pressure
*READ?
*STATUS:MEAS?
*MEAS:P:FORE?
0 = good
1 = medium
2 = bad
0=NO CAL RUNNING
1=T<20 MIN, CONFIRM
2=CAL RUNNING, WAIT
3=CAL FINISHED
4=CAL FINISHED, CONFIRM
5=PROOF RUNNING, WAIT
6=PROOF FINISHED
7=PROOF FINISHED, CONFIRM
*CAL:STATUS?
1 State
Device state
(see "44 Get Status" in the binary
protocol)
READY,
CYCLE_ACTIVE,
STANDBY,
MEASURE,
GROSS
0
Background
CAL Status