Caution motion group <motion group tag name>. Coarse rate may be too small to process the number of assigned axes.
You have entered a coarse rate of less than 1 ms/axis.
coarse rate
A type of rate that selects the periodic rate (at which the motion task executes) to compute the servo commanded position, velocity, and accelerations to be sent to the output modules when executing motion instructions.
NOTE:
If the coarse rate is too small, the AC processor may not have time to execute non-motion related ladder logic. As a general rule, one millisecond per axis is required by the motion task in order to allow the processor reasonable execution time.
To calculate the coarse rate (or coarse update period) for the number of axes in your application, use the following formula:
2 *(Baseline task time + [Actions for axis 1 + Actions for axis 2 . . . + Actions for axis n]) = Coarse Update period |
You must then divide the result of this calculation by 1000 and round it to the nearest millisecond.
This message is informational only; you are allowed to continue with the value you entered, or to enter a different coarse rate.
Provide Feedback