Siemens SIMATIC ET 200AL System Manual page 464

Interrupts/diagnostic alarms
5.2 Interrupts
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 alarm
Short-circuit
Load voltage 2L+
missing*
* If you are using ET 200AL modules in connection with the ET 200SP distributed I/O system, the
diagnostics alarm "Load voltage missing" is displayed.
20
Diagnostics alarms, their meanings and corrective measures
Error code Meaning
1 Short-circuit of outputs to
H
ground
11 Load voltage 2L+ missing or too
H
low
Digital output module DQ 8x24VDC/2A 8xM12 (6ES7142-5AF00-0BA0)
Remedy
Eliminate the short-circuit
•
Check the supply voltage
•
Check the module
•
Manual, 02/2016, A5E36683723-AA