Maxsine EP3 AC Series, User Manual

Page: 78 / 246

Chapter 4 Running
68
4.3.5 Clamp on zero speed
The parameters relate to zero speed clamp:
Para
meter
Name Range
Default
value
Unit Usage
P160 Check point for zero speed 0 ～ 1000 10 r/min ALL
P161 Hysteresis for zero speed check 0
～
1000 5 r/min ALL
P162 Zero speed clamp mode 0
～
1 0 S
In the speed control mode, a position change may occur by an external force even if the
servomotor is in zero speed. For analog speed command input, the absolute zero speed command
is not easy to realize. In order to solve these two problems, a clamp function of zero speed can be
used. Start the clamp function of zero speed when the following condition satisfies:
Condition 1: Speed mode.
Condition 2: ZCLAMP (zero speed clamp) of DI is on.
Condition 3: The speed command is lower than the parameter P160.
When any condition mentioned above does not satisfy, carries out the normal speed control.
The zero speed clamp has two kind of mode:
P162 Explanation
0 The position of the servomotor is fixed just when the clamp function starts. This time
the servo driver itself changes to the position control mode, and keeps the fixed point
even if the external force causes displacement.
1 The speed command is forced to zero when the clamp function starts. The servo