Replacing Defective Io Devices/Switches - Siemens SIMATIC S7-1500 System Manual

14.1.8

Replacing defective IO devices/switches

Initial situation
A PROFINET device (IO device/switch) in the PROFINET ring or the line topology has failed, for
example because of a defect in the IO device or failure of the power supply. The PROFINET
ring or line topology is interrupted. The MAINT LEDs on both CPUs are yellow. The ERROR
LEDs on both CPUs are flashing red.
The S7-1500R/H redundant system is in the RUN-Redundant system state.
Note
If a switch/IO device fails, the S7-1500R/H redundant system has no access to the
downstream devices in the connected line topology.
Replace IO device procedure
Proceed as follows to replace a defective PROFINET device:
1. Locate the faulty PROFINET device.
2. Switch off the supply voltage for the PROFINET device.
3. Disconnect the cables for the supply voltage.
4. Disconnect the PROFINET cables from the ports of the PROFINET device.
5. Replace the PROFINET device.
6. Connect the PROFINET cables to the ports of the PROFINET device.
7. Connect the cables for the supply voltage to the PROFINET device.
8. Switch the supply voltage back on.
Note
Setting the media redundancy role Client for the PROFINET devices
If you replace a PROFINET device in the PROFINET ring, you need to assign the media
redundancy role "Client" to the PROFINET device in STEP 7. The client media redundancy role
setting is important for nodes that are not IO devices (such as switches). These nodes do not
receive the parameters assigned by the R/H CPUs.
Replaced IO devices are automatically configured by the R/H-System and receive the correct
setting again.
Procedure for replacing the interface module of an R1 device
If you replace a defective interface module of an R1 device, then follow the procedure in the
associated documentation.
S7-1500R/H redundant system
System Manual, 01/2024, A5E41814787-AF
14.1 Replacing components of the S7-1500R/H redundant system
Maintenance
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