Speed Limit - Mitsubishi Electric FR-A800 Series Instruction Manual

Pr.803 = 0, 1, 10, 11
Torque
Pr.803 = 2
Torque
Pr.801
 Reverse selection of the torque command (Pr.1114)
• The Pr.1114 Torque command reverse selection setting determines whether or not the torque command polarity is
reversed when the reverse rotation command (STR) is turned ON.
Pr.1114 setting
0
1 (Initial value)
Parameters referred to
Pr.868 Terminal 1 function
Calibration parameter C16 (Pr.919) to C19 (Pr.920) (terminal 1 bias, gain
5.4.5
Sensorless Sensorless Sensorless Vector Vector Vector
When operating under torque control, motor overspeeding may occur if the load torque drops to a value less than the torque
command value, etc. Set the speed limit value to prevent overspeeding.
If the actual speed reaches or exceeds the speed limit value, the control method switches from torque control to speed control,
preventing overspeeding.
Pr.
807
Speed limit selection
H410
808 Forward rotation speed
H411 limit/speed limit
Reverse rotation speed
809
limit/reverse-side speed
H412
limit
1113 Speed limit method
H414 selection
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Constant power range
Constant torque range
Rated speed
Constant torque range Constant power range
Constant torque
command
Rated speed
Torque command polarity at STR signal ON
(sign)
Not reversed
Reversed
assignmentpage 500

Speed limit

Initial value
Name
FM
0
60 Hz 50 Hz 0 to 400 Hz
9999
0
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Pr. 803 = 1, 11:
constant torque command
Pr. 803 = 0, 10:
constant power command
(torque reduction)
Speed
Torque reduction
when the output is
limited
When the output limit
is not exceeded
Speed
torque)page 510
Setting
range
CA
0 Uses the speed command during speed control as the speed limit.
Sets speed limits for forward and reverse directions individually by
1
using Pr.808 and Pr.809.
Forward/reverse rotation speed limit
2 Applies speed limit by analog voltage input to the terminal 1. Speed
limit for forward/reverse side is switched by its polarity.
Sets the forward side speed limit.
0 to 400 Hz Sets the reverse side speed limit.
9999 Pr.808 setting value is effective.
9999 Speed limit mode 1
0 Speed limit mode 2
1 Speed limit mode 3
2 Speed limit mode 4
X93 signal OFF: Speed limit mode 3,
10
X93 signal ON: Speed limit mode 4
5.4 Torque control under Real sensorless vector control and Vector control
Description
5. PARAMETERS
1
2
3
4
5
6
7
8
9
10
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