Planning example for CM574-RS/CS31 bus

Planning the cyclic data exchange of the inputs and outputs of the CS31 bus modules on the CM574-RS with a Processor Module is illustrated in the following example configuration:

• PM582 with CM574-RS in slot 1
• CM574-RS: COM1 CS31 bus, COM2 online access
• CS31 cluster 1: DC551 with HW address switch = 70, i.e. address 0 and fast counter enabled
• CS31 cluster 2: DC551 with HW address switch = 1 and S500 extensions 1xAX522 + 1xDC532

Accordingly, PLC configuration in the CM574-RS project is as follows:

If you open the last module (here: DC532), you can see that the highest input byte is %IB1037, and the highest output byte is %QB1041.

Thus, the configuration on the CS31 bus has

38 bytes for inputs and 42 bytes for outputs.