Module Replacement - Siemens S7-300 Installation Manual

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Proceed as follows to put the new module into service:
1. Open the front panel.
2. Reinstall the front connector.
3. Close the front panel.
4. Switch the load voltage back on.
5. Set the CPU to RUN mode again.
Figure 10-4 Inserting the front connector

Move the front connector into operating position

Close front panel.
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After module replacement the CPU switches to run mode, provided no error has
occurred. If the CPU maintains STOP status, you can view the cause of error with
67(3  (refer to the 67(3  User Manual).
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S7-300 Automation System, Hardware and Installation: CPU 312IFM - 318-2 DP
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A5E00203919-01