Siemens Simatic S7-1500 Manuel - Page 21

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Siemens Simatic S7-1500 Manuel
Meaning of the LED displays
The tables below explain the meaning of the status and error displays. Remedial measures
for diagnostics alarms can be found in section Diagnostics alarms (Page 22).
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
CHx LED
Table 5- 2
CHx status display
LED CHx
Off
On
Digital output module DQ 16x24...48VUC/125VDC/0.5A ST (6ES7522-5EH00-0AB0)
Manual, 11/2015, A5E35683139-AA
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., parameter assignment er-
ror).
Hardware defective
Meaning
0 = Status of the output signal
1 = Status of the output signal
Interrupts/diagnostics alarms
5.1 Status and error displays
Remedy
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.
Remedy
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