Siemens S7-300 appendix Reusing existing hardware configurations, Replacing a CPU 31xC/31x

Appendix

A.1 Information about upgrading to a CPU 31xC or CPU 31x

A.1.6 Reusing existing hardware configurations

Reusing existing hardware configurations

If you reuse the configuration of a CPU 312 IFM to 318-2 DP for a CPU 31xC/31x, the CPU 31xC/31x may not run correctly.

If this is the case, you will have to replace the CPU in the STEP 7 hardware configuration editor. When you replace the CPU, STEP 7 will automatically accept all the settings (if appropriate and possible).

A.1.7 Replacing a CPU 31xC/31x

Replacing a CPU 31xC/31x

When supplied, the CPU 31xC/31x adds a connecting plug to the power supply connector.

You no longer need to disconnect the cables of the CPU when you replace a 31xC / 31x CPU. Insert a screwdriver with 3.5 mm blade into the right side of the connector to open the interlock mechanism, then unplug it from the CPU. Once you have replaced the CPU, simply plug the connecting plug back into the power supply connector.

A-6	CPU 31xC and CPU 31x, Technical data
	Manual, Edition 08/2004, A5E00105475-05