Replace Defective Load Current Supply Pm - Siemens SIMATIC S7-1500 System Manual

Maintenance
13.1 Replacing components of the S7-1500R/H redundant system
Procedure
Proceed as follows to replace a defective SIMATIC memory card:
1. Replace the SIMATIC memory card in the CPU in STOP.
2. Start the CPU.
Result
1. The redundant system runs SYNCUP. SYNCUP transfers the project data from the primary
to the backup CPU.
2. The CPU switches to the RUN-Redundant operating state and operates as backup CPU. The
redundant system is in the RUN-Redundant system state again.
Reference
If there is not enough memory space on a SIMATIC memory card, the card can be replaced
during operation. You will find the procedure, the response of the redundant system and
other information on the SIMATIC memory card in the function manual Structure and use of
the CPU memory (https://support.industry.siemens.com/cs/ww/en/view/59193101).
13.1.6

Replace defective load current supply PM

Initial situation
A load current supply PM has failed.
The S7‑1500R/H redundant system is in the RUN-Solo system state.
Requirement
Read the information in the section Checking before replacing components (Page 319).
Procedure
Proceed as follows to replace a defective load current supply:
1. Switch off the mains supply (24 V DC or 230 V AC).
2. Replace the defective load current supply PM.
3. Switch the mains supply back on.
4. Switch on the replaced load current supply PM.
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S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD