Siemens simatic s7-1500 User Manual page 42

Interrupts/diagnostics alarms
5.1 Status and error displays
Meaning of the LED displays
The following tables explain the meaning of the status and error displays. Remedial
measures for diagnostic alarms can be found in section Diagnostic alarms (Page 45).
RUN and ERROR LED
Table 5- 1 Status and error displays RUN and ERROR
LEDs
RUN ERROR
Voltage missing or too low at backplane bus.
Off Off
The module starts and flashes until the valid
parameter assignment is set.
Flashes Off
Module is configured.
On Off
Indicates module errors (at least one error at
one channel, e.g., wire break).
On Flashes
Hardware defective.
Flashes Flashes
PWR LED
Table 5- 2 PWR status display
LED PWR
Supply voltage L+ to module too low or missing
Off
Supply voltage L+ is present and OK.
On
CHx LED
Table 5- 3 CHx status display
LED CHx
Channel disabled
Off
Channel configured and OK.
On
Channel is configured (channel error pending).
Diagnostic alarm: e.g. wire break
On
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Meaning
Meaning
Meaning
Analog Input Module AI 8xU/R/RTD/TC HF (6ES7531-7PF00-0AB0)
Remedy
Switch on the CPU and/or the system power
•
supply modules.
Verify that the U connectors are inserted.
•
Check whether too many modules are insert-
•
ed.
---
Evaluate the diagnostics data and eliminate the
error (e.g., wire break).
Replace the module.
Remedy
Check supply voltage L+.
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Remedy
---
---
Check the wiring.
Disable diagnostics.
Manual, 09/2016, A5E36647959-AB