dminerath

05-17-2012, 04:27 PM

I am using the DERIVATIVE function on the CR1051 to calculate the rate of change of a value put onto the CAN bus every 100 ms and read by the CR1051. My PLC cycle time is roughly 20-30 ms.

What is the best time base to use with the DERIVATIVE function block, the PLC cycle time or the frequency of the data being put onto the CAN bus (100 ms)?

Thanks,

Dave

What is the best time base to use with the DERIVATIVE function block, the PLC cycle time or the frequency of the data being put onto the CAN bus (100 ms)?

Thanks,

Dave