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Siemens TX-I/O Engineering and installation guide CM110562en_13
Building Technologies TX-I/O™ mounting instructions 2019-05-15
4.5 Replacing a bus interface module
If you replace a P-Bus BIM, it is mandatory that the new BIM contains no old IOMD.
Otherwise the connected I/O modules are re-configured immediately after powering the
BIM with AC 24 V or after connecting the I/O modules to the BIM.
In order to fully reset a P-bus BIM, the following steps are required
(see also Knowledge base entry
KB 807):
1. Disconnect the PXC from the power supply
2. Disconnect the BIM from the power supply
3. On the BIM, place a shunt between conductors CD and CS to create a short
circuit
4. Power the BIM with AC 24 V (no danger for the BIM by the short circuit)
5. Download the correct configuration
6. Remove the short circuit
7. Power the PXC with AC 24 V
Now the TX-I/O modules will keep their original configuration and the BIM will start
working.
1. Before inserting, assign the correct IP address and the correct device name to the
PROFINET BIM , using S7 HW Config.
To do this, connect the tool via Ethernet, and supply the BIM with AC 24 V.
You might also parameterize the IP addresses and the device name after the
exchange. BUT this involves the risk of duplicate addresses with the preset
address (192.168.1.1) and the preset device name (profinetbim).
2. After parameterizing, disconnect the BIM from the power supply for a short time.
3. Replace the BIM. The new BIM will be automatically loaded by the S7 300 / 400.
4. The S7 and the TX-I/O modules can continue to operate during the exchange, no
need to switch them off.
The PROFINET BIM does not locally store configuration information of the connected
TX-I/O modules.
P-Bus BIM
PROFINET BIM
Note