Speed Limit - Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual

 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.
Torque command polarity at STR signal ON
Pr.1114 setting
0 Not reversed
1 (Initial value) Reversed
Parameters referred to
Pr.868 Terminal 1 function
Calibration parameter C16 (Pr.919) to C19 (Pr.920) (terminal 1 bias, gain
5.4.5

Speed limit

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. Name
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
 Speed limit method selection (Pr.1113)
Pr.1113
Speed limit method
setting
9999 Speed limit mode 1
0 (initial
Speed limit mode 2
value)
1 Speed limit mode 3
2 Speed limit mode 4
Switching by external
10
terminals
274
5. PARAMETERS
5.4 Torque control under Real sensorless vector control and Vector control
(sign)
assignmentpage 477
Initial value
FM CA
0
60 Hz 50 Hz 0 to 400 Hz
9999
0
Forward rotation speed limit
Pr.807 = 0: Speed command during speed control
Pr.807 = 1: Pr.808
Pr.807 = 2: Analog input at analog input of 0 to 10 V, or Pr.1 at analog input of -10 to 0 V
Reverse rotation speed limit
Pr.807 = 0: Speed command during speed control
Pr.807 = 1: Pr.809, or Pr.808 when Pr.809 = "9999"
Pr.807 = 2: Pr.1 at analog input of 0 to 10 V, or analog input at analog input of -10 to 0 V
Speed limit
Pr.807 = 0 or 2: Speed command during speed control
Pr.807 = 1: Pr.808
Reverse-side speed limit
Pr.809, or Pr.808 when Pr.809 = 9999
X93 signal OFF: Speed limit mode 3
X93 signal ON: Speed limit mode 4
torque)page 487
Setting
range
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
Speed limit value
Description