Diagnostics Alarms - Siemens SIMATIC S7-1500 Equipment Manual

RUN and ERROR LED
Table 5- 1 Status and error displays RUN and ERROR
LED
RUN ERROR
Off Off
Off
Flashes
On Off
Flashes Flashes
CHx LED
Table 5- 2 CHx status display
LED CHx
Off
On
5.2

Diagnostics alarms

Diagnostics alarms
A diagnostics alarm is generated and the ERROR LED flashes on the module for each
diagnostics event. The diagnostics alarms can be read out in the diagnostics buffer of the
CPU, for example. You can evaluate the error codes with the user program.
Table 5- 3 Diagnostics alarms, their meaning and corrective measures
Diagnostics alarm
Limit value warning
Digital output module DQ 8x230VAC/2A ST Triac (6ES7522-5FF00-0AB0)
Equipment Manual, 12/2021, A5E03485733-AE
Meaning
Voltage missing or too low at backplane bus
The module starts and flashes until the valid pa-
rameter assignment is set.
Module is configured
Hardware defective
Meaning
0 = Status of the output signal
1 = Status of the output signal
Error code Meaning
17 The configured limit for switching cy-
H
cles has been exceeded.
5.2 Diagnostics alarms
Remedy
• Switch on the CPU and/or the system power
supply modules.
• Verify that the U connectors are inserted.
• Check to see if too many modules are in-
serted.
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Replace the module.
Remedy
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Corrective measures
• Replace actuator as a precaution-
ary measure
• Reset counter with DS131
Diagnostic alarms
19