Behavior of the ET 200PA SMART after module replacement
If there is an error after module replacement, you can view the cause of the error in the
diagnostic buffer with
HW Config
.
In the case of redundancy
Note
If the active IM 650 ("ACT" LED On) is to be replaced, the I/O will only continue running
undisturbed if
● the BF LED is not lit or flashing and the SF LED is not flashing at 0.5 Hz on the passive IM 650
● in a flying redundancy system, it is evident from the master diagnostics that both IM modules
are accessible (in this case, the BF LED can flash).
Have you replaced an active IM 650 ("ACT" LED
on)?
Have you replaced a passive IM 650 ("ACT" LED
Off)?
Then, a changeover to the other IM 650 occurred
in the ET 200PA SMART and this one also main‐
tains the data communication with its DP master.
No change in the data communication: the active
IM 650 has maintained the data communication
with its DP master.
Does the new IM 650 have a different product version than the other one that has not been replaced?
If, after replacement, the newly installed IM 650 goes "into STOP" (all LEDs flashing), then the versions
are not compatible. In this case, you must switch off the ET 200PA SMART and upgrade both IM 650
modules or use a compatible version.
Please contact your Siemens representative.
See also
Diagnostics of the IM 650 by LED displays (Page 88)
Maintenance and service
6.3 Replacing the IM 650
ET 200PA SMART
62 Operating Instructions, 06/2019, A5E34192013-AB
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