INFICON LDS3000 Modular Leak Detector Interface description - Manual (Page 50)

50 Fieldbus Communication
Information The PROFIBUS-DP protocol is subject to change. If you are using this
protocol, please ask INFICON for an update.
6.3.2 Read Process Data (Leak Detector  PLC)
This data is sent periodically from the leak detector to the programmable logic cont-
roller:
2
0
Gas ballast
Transition 0 -> 1: 0x01 = Gasballast on
Transition 1 -> 0: 0x00 = Gasballast off (if
Gasballast mode != GASBALLAST_ON)
Gasballast
1
2
Zero mode
0 = normal
0x04 = 1 ... 2 dec.
0x08 = 2 ... 3 dec.
0x0C = 19/20 part of the value
3
4
CAL mode
0 = external CAL
0x10 = dyn. CAL
0x20…0x30 = not used
Select dyn/
norm
5
6
Sniff/Vac
0 = Vacuum
0x40 = Sniff
0x80 = according to PLC-Input
0xC0 = not used
Sniff
*CONFIG:M
ODE
401
7
Byte Bit Name Meaning
Similar to
PLC Output
Similar to
RS232 ASCII
cmd. Similar to
RS232 LD
cmd.
1
0 (not used) always 1
1 Zero active
0 = off
0x02 = on
ZERO active
*STATUS:ZE
RO?
2 Error
0 = no error
0x04 = error
Error
Status
word
3 Warning
0 = no warning
0x08 = warning
Warning
Status
word
4 State
internal
calibration 0 = inactive
0x10 = active
0x20/0x30 = not used
CAL active
*STATUS:C
AL?
260
5
6 State
external
calibration
0 = inactive
1 = 0x40 = active
2 = 0x80 = waiting for test leak closed
3 = 0xC0 = not used
CAL active
*STATUS:C
AL?
260
7