Power Supply Fault - Siemens SIMATIC EMS400S PSB-S Operating Instructions Manual

8.2.3

Power supply fault.

The following table contains a selection of possible errors. You can see how these errors are
displayed and what you have to do to rectify the error.
Error
48 V input voltage is missing
permanently
Input voltage 48 V missing
max. 250 ms or short-term
interruption of the
synchronization signal at the
PSB-C module
Polarity reversal of the 48 V
input voltage
Input SYNC is not connected,
or the synchronization signal is
not generated
Input SYNC it is connected,
the frequency of the
synchronization signal is too
high
Short-circuit on RAIL
Short-circuit at RAIL A and
RAIL B of a plant segment.
Polarity reversal on RAIL
Polarity reversal at RAIL A and
RAIL B of a plant segment.
PSB modules
Operating Instructions, 03/2014, A5E03474166-03
Diagnostics event
A combination of the following diagnostics events is triggered:
Error
•
Unknown error 000B
•
The following diagnostics event is triggered:
Error
•
A combination of the following diagnostics events is triggered:
Process interrupt lost/sampling error
•
Unknown error 000B
•
The bridging of two PSB-S modules may result in the
communication failure of several PSB-S modules.
The SYNC LED is inactive
•
The ERR RAIL LEDs do not provide optical feedback
•
The "Process interrupt lost/sampling error" diagnostics event is
•
displayed in STEP 7
The SYNC LED is active
•
The "Process interrupt lost/sampling error" diagnostics event is
•
displayed in STEP 7
Reduce the clock frequency for the synchronization signal.
Plant segment controller
•
The following diagnostic events are triggered:
– ERR RAIL LEDs 1 to 3 are active
– The presence and validation bit in the PII are set to zero
Carrier controller
•
The following diagnostic events are triggered:
– SYNC LED is inactive
– ERR RAIL LED is active
– Process interrupt lost/sampling error
The data corresponds to the last data read.
Error on overload and short-circuit on RAIL
While the polarity is reversed on rail RAIL, only the ERR RAIL LEDs
of the PSB-S module at the plant segments where polarity is not
reversed are lit. The ERR RAIL LED of the plant segment at which
polarity is reversed is switched off.
Diagnostics options for PSB modules
8.2 Messages and errors
51