Siemens simatic ET 200MP Manual - Page 19

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Siemens simatic ET 200MP Manual
Meaning of the LED displays
The following table explains the meaning of the status and error displays.
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
DI 16x230VAC BA Digital Input Module (6ES7521-1FH00-0AA0)
Manual, 09/2016, A5E03485975-AD
Meaning
Voltage missing or too low at backplane bus
Module starts up
Module is ready
Hardware defective
Meaning
0 = Status of the input signal
1 = Status of the input signal
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.
---
Replace the module.
Remedy
---
---
Diagnostic alarms
19