Mitsubishi Electric QD77MS User Manual page 68

Restrictions
(1) "[Cd.325] Input value for synchronous encoder via CPU" is taken every operation
cycle, but it is asynchronous with the scan time of the PLC CPU. Therefore, speed
fluctuation of the synchronous encoder axis becomes larger if the refresh cycle of
"[Cd.325] Input value for synchronous encoder via CPU" becomes long.
Update "[Cd.325] Input value for synchronous encoder via CPU" in a cycle less than
the operation cycle or use smooth speed fluctuation with the smoothing function.
(2) The synchronous encoder current value that is restored for the synchronous encoder
connection gets restored into a converted value from the following range based on the
synchronous encoder travel value on disconnection.
Setting value of
"[Pr.329] Resolution of
synchronous encoder via CPU"
1 or more
0 or less
Range of restored synchronous encoder current value
-(Resolution of synchronous encoder via CPU/2) to (Resolution of
synchronous encoder via CPU/2-1) [PLS]
(Note): If the resolution of a synchronous encoder via CPU is an odd number,
round down a negative value after the decimal point, round up a
positive value after decimal point.
-2147483648 to 2147483647 [PLS]
2 - 20
Chapter 2 Input Axis Module