Interrupts; Diagnostics Alarms - Siemens SIMATIC ET 200AL Manual

5.2

Interrupts

The AQ 4xU/I 4xM12 analog output module supports diagnostics interrupts.
Diagnostic interrupt
The module generates a diagnostic interrupt at the following events:
● Short-circuit of the actuator supply
● Short-circuit (voltage)
● Wire break (current)
● High limit violated
● Low limit violated
● Parameter assignment error
5.3

Diagnostics alarms

For each diagnostic event, a diagnostics alarm is issued and the DIAG LED flashes red on
the analog output module. You can read out the diagnostics alarms, for example, in the
diagnostics buffer of the CPU. You can evaluate the error codes with the user program.
The following tables show the diagnostics alarms for all measuring ranges.
Table 5- 3
Diagnostics
alarm
Short circuit to
ground
Wire break
High limit violat-
ed
Low limit violated 8
Parameter as-
signment error
Analog output module AQ 4xU/I 4xM12 (6ES7145-5ND00-0BA0)
Manual, 07/2019, A5E38687953-AB
Diagnostics alarms
Error Meaning
code
1
Short-circuit of actuator supply to
•
H
ground
Short-circuit of output to ground
•
6 Actuator circuit impedance too high
H
Wire break between the module and
sensor
Channel not connected (open)
7 The output value set by the user
H
program violates the valid rated
range/overrange.
The output value set by the user
H
program violates the valid rated
range/underrange.
10 Module parameter assignment is
H
faulty
Interrupts/diagnostics alarms
5.2 Interrupts
Solution
Correct the process wiring
Use a different actuator type or
modify the wiring, e.g. use cables
with larger cross-section
Connect the cable
Deactivate diagnostics
•
Connect the channel
•
Deactivate channel
•
Correct the output value
Correct the output value
Correct the parameter assign-
ment
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