Faster scan rate

[lakefalos]

I am communicating with multiple PLC's via Modbus. WinCC is giving a go command to some motors. The motors must o be synched so that they start at the same time, I need the function that sends the "go command" to take priority over other functions and also requires a higher scan rate than others. Is there a way to do this in WinCC OA?

Thank you,
Lori

[gschijndel]

There is no way to prioritize commands over other commands. The values are written to the PLC as soon as possible, it does not wait until the next poll cycle.
The (feedback) values can be read faster than other values by using a poll group with a smaller interval.