Instruction manual

42
Torque control operation
4.2.6 Speed limit
Set the speed limit value to prevent the motor from over speeding due to a smaller load torque than the torque
command value.
Select the speed limit input method using Pr. 807.
Parameter Name
Factory
Setting
Setting Range
807 Speed limit selection 0 0, 1, 2
808 Forward rotation speed control 1500r/min 0 to 3600r/min
809 Reverse rotation speed control 9999 0 to 3600r/min, 9999
Pr. 807 Setting
Speed Limit Input
Method
Operation
0
(factory setting)
Same method as speed
setting for speed control
• Speed setting from the control panel
• External analog command (terminal 1, 2)
• Multi-speed command
• Option (FR-V5AX etc.)
• For both PU and external operations, the speed limit changes according to
the acceleration/deceleration time. (Refer to page 43)
1
Pr. 808 Forward rotation
speed limit
Pr. 809 Reverse rotation
speed limit
According to the rotation direction, set the speed limit in forward and reverse
rotation directions individually. When the reverse rotation speed limit is 9999,
the setting is the same as that of the torque limit in forward rotation direction.
( Refer to the Instruction Manual (detailed).)
2
Forward/reverse rotation
speed limit
(analog polarity
switchover speed limit)
(terminal 1 analog input)
The analog voltage of the terminal 1 input is used to make speed limit. For 0 to
10V input, set the forward rotation speed limit. (The reverse rotation speed limit
is Pr. 1 "maximum speed".) For -10 to 0V input, set the reverse rotation speed
limit. (The forward rotation speed limit is Pr. 1 "maximum speed".) The
maximum speed of both the forward and reverse rotations is Pr. 1 "maximum
speed". When terminal 1 input is selected, set "5" in Pr. 868 "terminal 1
function assignment".
Use Pr. 917 or Pr. 918 to calibrate the terminal 1.
( Refer to the Instruction Manual (detailed).)
+
+
-
-
0
1
2
Forward, reverse rotation
speed limit parameter
Forward/reverse rotation
speed limit
(analog polarity switchover
speed limit)
Torque command
Speed setting for
speed control
Speed control
(proportional control)
Torque
control
+
Motor
Speed limit
input selection
Encoder
Speed feedback value < speed limit value
Speed feedback value speed limit value