Information for the Changeover to the Technology CPU
9.6 Reusing existing hardware configurations
• The interface module is also modeled as a separate, virtual slot for some slaves (e.g.
CPU as intelligent slave or IM 153) in which case it is assigned to virtual slot 2 with a
separate address.
When the
Technology CPU is used as an intelligent slave, for example, the operating
status change is signaled in diagnostic interrupt OB 82 of the master via this address.
Note
Reading diagnostics data with SFC 13 "DPNRM_DG":
The originally assigned diagnostics address still works. Internally,
STEP 7
assigns this
address to slot 0.
When using SFC51 "RDSYSST", for example, to read module status information or module
rack/station status information, you must also consider the change in slot significance as well
as the additional slot 0.
9.6 9.6 Reusing existing hardware configurations
Reusing existing hardware configurations
If you reuse the configuration of a CPU 312 IFM to 318-2 DP for a Technology CPU, the
CPU 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).
9.7 9.7 Replacement of a Technology CPU
Replacement of a Technology CPU
The Technology CPU is supplied with a connector inserted in the power supply port.
You do not need to disconnect the cables of the CPU when you replace a
Technology 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.
S7-300 CPU Data: CPU 315T-2 DP
Manual, 12/2005, A5E00427933-02
9-5
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