
B. PARAMETERS
B--65245EN/02
APPENDIXES
208
Assume the following:
Integral gain = 100
Proportional gain = --500
Load inertia ratio = 128
Velocity loop gain override during velocity control = 200%
[Gain during position control]
Integral gain = 100×(1+128/256) = 150
Proportional gain = --500×(1+128/256) = --750
[Gain during velocity control]
Integral gain = 100×(1+128/256)×200/100 = 300
Proportional gain = --500×(1+128/256)×200/100 = --1500
Thus, the gain with the load inertia ratio taken into consideration is
multiplied by the gain override during velocity control.
135 Linear acceleration/deceleration time constant for velocity control
Size : 2 bytes
Unit :ms
Valid data range : 8 to 4000
Specify the time required to reach 4000 rpm.
Example) If the value specified for velocity is 2000 rpm, and the time
required to reach 2000 rpm is to be 1000 msec, the value to
be set is calculated as follows:
Value to be set = (4000/2000)×1000 = 2000
136 Velocity deviation check limit during velocity control
Size : 2 bytes
Unit :rpm
Valid data range : 0 to 4000
Standard setting : 0 (velocity deviation check not performed)
Set the limit on the velocity deviation check to be performed in velocity
control mode.
In velocity control mode, alarm 447 is issued if the deviation of the actual
velocity from the specified velocity exceeds the value set for this
parameter.
180 Reference counter capacity
Size : 4 bytes
Valid data range : 0 to 99999999
Standard setting : 10000
This parameter specifies a reference counter capacity.
Reference counter capacity = number of pulses per motor revolution
(detection increment)