Replacing Im 153-4 Pn - Siemens SIMATIC ET 200M Operating Instructions Manual

Maintenance and service

7.5 Replacing IM 153-4 PN

In the case of redundancy
Note
If the active IM 153 -2 / -2 FO ("ACT"-LED on) is to be replaced, the I/O modules then continue
to run uninterrupted if
• on the passive IM 153 -2 / -2 FO neither the BF LED is lit or is flashing nor the SF LED
flashes at 0.5 Hz.
• with a flying redundancy system, from which it is evident from the master diagnosis that
both IM are available (in this case the BF LED can flash).
Have you replaced an active IM 153 -2 / -2 FO
("ACT"-LED on)?
The in the ET 200M the other IM 153-2 / -2 FO is
switched to and this also maintains the data traf-
fic to its DP master.
Does the new IM 153 -2 / -2 FO have a different version to that of the one that has not been
replaced?
If, after replacement, the IM 153 -2 / -2 FO that has just been replaced goes to "STOP" (all LEDs flash-
ing), then the versions are not compatible. In this case, you must switch off the ET 200M and update
both IM 153-2 / -2 FO or use a compatible version.
Contact your Siemens representative.
See also
Diagnostics with LED display (Page 181)
7.5 Replacing IM 153-4 PN
Initial situation
The IM 153-4 PN is installed. A new IM 153-4 PN of the same type should be installed.
Slot numbering
If you have provided the modules in your system with slot numbering, when replacing
modules you must remove the numbering from the old module and then reuse it in the new
module.
106
Have you replaced a passive IM 153 -2 / -2 FO
("ACT"-LED off)?
No change in data traffic: the active IM 153 -2 / -2
FO maintains the data traffic to its DP master.
Operating Instructions, 04/2022, EWA-4NEB7806006-09
ET 200M