Siemens SIMATIC ET 200AL, System Manual

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Configuration modes for digital inputs/outputs
3.4 Interrupts/diagnostic alarms
Digital input/Digital output module DIQ 16x24VDC/0.5A 8xM12 (6ES7143-5AH00-0BA0)
Equipment Manual, 08/2021, A5E38688112-AD
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3.4.2 Interrupts
The digital input / digital output module DIQ 16x24VDC/0.5A 8xM12 in the configuration
method DIQ supports diagnostic interrupts.
Diagnostic interrupt
The digital input/digital output module generates a diagnostic interrupt at the following
events:
•
Short-circuit of an encoder supply to ground, or
• Short-circuit of an output to ground
• Load voltage 2L+ missing or too low
• Parameter assignment error
3.4.3 Diagnostics alarms
For each diagnostic event, a diagnostics alarm is issued and the LED DIAG flashes red on the
digital input/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 3- 16 Diagnostics alarms, their meanings and corrective measures
Diagnostics alarm Error code Meaning Solution
Short circuit 1 1
H
Short-circuit of an encoder sup-
ply to ground
• Eliminate the short-circuit
Short-circuit of an output to
ground
Parameter as-
signment error
10
H
Module parameter assignment is
faulty
Correction of the parameter
assignment
Load voltage 2L+
missing 2
11
H
Load voltage 2L+ missing or too
low
• Check the supply voltage
• Check the module
1
= If a short-circuit of an encoder supply to ground is detected, the diagnostic alarm "Short-circuit" is
always output. This alarm is output even if all channels are configured as outputs.
2
= If you are using ET 200AL modules in connection with the ET 200SP distributed I/O system, the
diagnostic alarm "Load voltage missing" is displayed.
Note
Channel type
The digital input/digital output module is always signaled as a mixed module (channel type
"Input/Output") in the case of diagnostic events, even if you have configured the digital
input/digital output module exclusively as an output or input module.