Siemens simatic S7-1500 Manual page 26

Interrupts/diagnostics alarms
5.1 Status and error displays
Meaning of the LED displays
The tables below explain the meaning of the status and error displays. Remedial measures
for diagnostic reports can be found in chapter Diagnostics alarms (Page 28).
RUN and ERROR LED
Table 5- 1 Status and error displays RUN and ERROR
LED
RUN ERROR
Off Off
Flashes Off
On Off
On Flashes
Flashes Flashes
PWR1/PWR2/PWR3/PWR4 LED
Table 5- 2 PWR1/PWR2/PWR3/PWR4 status display
LED PWRx
Off
On
CHx LED
Table 5- 3 CHx status display
LED CHx
Off
On
On
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Meaning
Voltage missing or too low at backplane bus
The module starts and flashes until the valid
parameter assignment is set.
Module is configured
Indicates module errors (at least one error at
one channel, e.g., short-circuit to ground).
Hardware defective
Meaning
Supply voltage L+ too low or missing
Supply voltage L+ is present and OK
Meaning
0 = Status of the output signal
1 = Status of the output signal
Wire break or short-circuit to ground
•
Supply voltage L+ missing or too low
•
Switch on the CPU and/or the system pow-
•
er supply modules.
Verify that the U connectors are inserted.
•
Check to see if too many modules are in-
•
serted.
---
Evaluate the diagnostics data and eliminate the
error (e.g., check the cables).
Replace the module.
Check the L+ supply voltage.
---
---
---
Correct the process wiring
•
Check the supply voltage.
•
Digital output module DQ 32x24VDC/0.5A HF (6ES7522-1BL01-0AB0)
Remedy
Remedy
Remedy
Manual, 09/2016, A5E35683508-AB