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

Maintenance
11.1 Replacing components of the S7-1500R/H redundant system
11.1.7

Replacing defective IO devices/switches

Initial situation
A PROFINET device (IO device/switch) in the PROFINET ring has failed, for example
because of a defect in the IO device or failure of the power supply. The PROFINET ring has
been 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.
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 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 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 devices that are not IO devices with system redundancy S2 (for
example S7-1500 CPUs and switches). PROFINET devices without system redundancy S2
are not assigned parameters by the R/H-CPUs.
Replaced IO devices with system redundancy S2 are automatically configured by the R/H
system and are reset to the correct settings.
Result
The PROFINET ring has been closed again. The PROFINET device can be accessed again
in the S7-1500R/H redundant system. The MAINT and ERROR LEDs on both CPUs are off.
268
S7-1500R/H redundant system
System Manual, 10/2018, A5E41814787-AA