When using IO scanning, all the devices are scanned at the same time. There is no way to structure the requests in a sequence between devices.
The M580 does have DIO_CTRL bits that you can use to activate/de-activate a specific IO scanning connection. Please check the DDT variables DIO_CTRL[x] where x corresponds to the connection number of the device in the DTM browser.
Also, IO scanning can only read/write to holding registers.
For a more sequenced approach, the other option is to use explicit messaging (eg. Read_var, Write_var blocks) instead.
Released for: Schneider Electric Australia
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