Siemens SIMATIC ET 200AL, System Manual

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Interrupts/diagnostic alarms
5.2 Interrupts
Digital output module DQ 8x24VDC/2A 8xM12 (6ES7142-5AF00-0BA0)
Equipment Manual, 08/2021, A5E36683723-AB
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5.2 Interrupts
The digital output module DQ 8x24VDC/2A 8xM12 supports diagnostics interrupts.
Diagnostic interrupt
The digital output module generates a diagnostic interrupt at the following events:
•
Short-circuit of outputs to ground
• Load voltage 2L+ missing or too low
5.3 Diagnostics alarms
For each diagnostic event, a diagnostics alarm is issued and the DIAG LED flashes red on the
digital output module. You can read out the diagnostics alarms, for example, from the
diagnostics buffer of the CPU. You can evaluate the error codes with the user program.
Table 5- 4 Diagnostics alarms, their meanings and corrective measures
Diagnostics alarm Error code Meaning Remedy
Short-circuit 1
H
Short-circuit of outputs to
ground
• Eliminate the short-circuit
Load voltage 2L+
missing*
11
H
Load voltage 2L+ missing or too
low
• Check the supply voltage
• Check the module
* If you are using ET 200AL modules in connection with the ET 200SP distributed I/O system, the di-
agnostics alarm "Load voltage missing" is displayed.