Siemens SIMATIC ET 200AL - Diagnostic Alarms (2 xCount); Alarm Codes and Corrective Measures (2 xCount)

Counting
4.1 Configuration method 2xCount
Digital input/Digital output module DIQ 16x24VDC/0.5A 8xM12 (6ES7143-5AH00-0BA0)
Manual, 03/2019, A5E38688112-AC
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4.1.3.3 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 4- 15 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
Hardware interrupt
lost
16
H
At least one hardware interrupt
could not be signaled because
too many hardware interrupts
are pending.
Correct the program or the pro-
cess
1
If a short-circuit of the 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.