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No. SX-DSV02310 - 108 -
R2.0 Motor
Business
Division,
Appliances Company, Panasonic Corporation
7-1-5 Variations in command position during command updating period
7-1-5-1 Limiting variations in command position
When applying the movement command, make sure that variations in command position during command updating
period will not exceed the maximum overspeed level.
Allowable input movement command value of servo driver (variations of command position during 1 s multiplied by
the electronic gear ratio) is 400 M pulses/s.
The movement command should not cause variations that may exceed the smaller one of these limits.
If a variation of command position during communication period is too large, Err. 27.4 (Command error protection) will
be activated.
7-1-5-2 Wrap rounding command position
If a variation of command position during communication period has exceeded 7FFFFFFFh, wraparound process starts.
7-1-5-3 Clearing position deviations
When clearing position deviations from the host controller, read the actual position (APOS) and set command position
to the value so that actual position (APOS) becomes equal to command position (CPOS).
Note that, as in the case of 7-1-4-1, change the command position (CPOS) gradually by dividing the command updating
period in several sub-periods so that variations in command position will not exceed the limit.
7FFFFFFFh
80000000h
In positive direction 1
(command unit) relative
displacement (wraparound
process)
In negative direction
4294967295 (command
unit) no relative
displacement
Physical
position
80000000h
Servo internal computation
Command position (command unit)
Example of wraparound process: Command position changed from 7FFFFFFFh to 80000000h