
6
-134
Setting Speed Limit Bias
You can use the speed limit bias to set the speed limit in the opposite direction of Run Command direction. Set
d5-05 to the speed limit bias as a percentage of the maximum output frequency.
For example, when setting both forward and reverse speed limits to 50%, set the speed limit to 50 (d5-03 = 2,
d5-04 = 50, and d5-05 = 50). The torque control range with these settings is between -50% to 50% of the
speed.
When the forward speed limit is set to 50% and the speed limit bias to 10%, the torque control range will be as
shown in the following figure.
Fig 6.71 Setting Speed Limit Bias
Torque Limit Operation Examples
Operation examples will be described separately for winding operation, in which the speed and motor torque
are in the same directions, and unwinding operation, in which the speed and motor torque are in opposite
directions.
Option board (AI-4B)
(-10 to 10 V)
Between TC1 and TC4
b1-01 = 3
F2-01 = 0
If H3-09 is set to 0, the input value
between terminals TC2 and TC4 will be
added the input value between terminals
TC1 and TC4 to determine the speed
limit. Set H3-09 to 1 to set the speed limit
to the multiplied values of the input value
between terminals TC2 and TC4 and the
input value between terminals TC1 and
TC4.
IMPORTANT
The direction in which speed is controlled is determined by the sign of the speed limit signal and the direction
of the Run Command.
• Positive voltage applied: The speed in the forward direction will be limited for forward operation.
• Negative voltage applied: The speed in the reverse direction will be limited for reverse operation.
If the direction of motor rotation and the command direction are not the same, speed will be limited to 0 as
long as b5-05 is set to 0.
Speed Limit Input Method
Location of
Reference
Constant
Settings
Remarks
Δ
N %
Δ
N will be set as follows
At motoring operation:
At regenerative operation: The smaller vaue
Forward torque
Forward run
Reverse run
Reverse torque
Torque reference [%]
C5-01
Torque reference [%]
C5-04
or d5-05
Speed limit bias
d5-05 10 %
Forward speed limit
d5-04 50 %
TOE-S616-60.1.book 134 ページ 2017年8月4日 金曜日 午後3時41分