Siemens 181

Interrupts/diagnostics alarms
5.3 Diagnostics alarms
Analog input module AI 4xRTD/TC 2-/3-/4-wire HF (6ES7134-6JD00-0CA1)
38 Manual, 02/2014, A5E03573289-AD
Diagnostic error interrupt
The module generates a diagnostic error interrupt at the following events:
● Channel temporarily unavailable
● Hardware interrupt lost
● Reference channel error
● Error
● Violation of low limit
● Violation of high limit
● Wire break
● Supply voltage missing
● Parameter assignment error
5.3
Diagnostics alarms
A diagnostics alarm is output for each diagnostics event and the DIAG LED on the module
flashes. The diagnostics alarms can, for example, be read from the diagnostics buffer of the
CPU. You can evaluate the error codes with the user program.
Table 5- 5 Diagnostics alarms, their meaning and remedies
Diagnostics alarms
Error code
Meaning
Remedy
Channel temporarily
unavailable
1F
H
Firmware update is being performed.
Channel 0 applies to the entire module.
The module is currently not performing
any measurements.
–
The channel is currently being calibrated.
Wire break 6
H
Resistance of sensor circuit too high Use a different sensor type or modify
the wiring, for example, using cables
with larger cross-section
Wire break between the module and
sensor
Connect the cable
Channel not connected (open)
• Deactivate diagnostics
• Connect or deactivate the channel
Violation of high limit
1
7
H
Value lies above the overrange.
Correct module/sensor interplay
Wire break
2
See Wire break
Violation of low limit
1
8
H
Value lies below the underrange.
Correct module/sensor interplay
Error 9
H
Internal module error has occurred
(diagnostics alarm on channel 0 applies to
the entire module).
Replace module