Mitsubishi Electric FR-A700 Technical Manual page 270

2.10.3 Speed limit [Pr. 807 to Pr. 809, C12 to C15 (Pr. 917, 918), C30 to C33(Pr. 926, 927))
A700 )
(A700)
Set the speed limit value to prevent overspeed of the motor
in case the load torque becomes less than the torque
command value, etc during torque control operation.
[Pr. ]
807 Speed limit selection
808 Forward rotation speed limit
809 Reverse rotation speed limit
C12(917) Terminal 1 bias frequency (speed)
C13(917) Terminal 1 bias (speed)
C14(918) Terminal 1 gain frequency (speed)
C15(918) Terminal 1 gain (speed)
C30(926)
Terminal 6 bias frequency (speed)
C31(926) Terminal 6 bias (speed)
C32(927) Terminal 6 gain frequency (speed)
C33(927)
Terminal 6 gain (speed)
* When FR-A7AZ is installed, forward/reverse rotation speed limit using terminal 6 is also available.
(1) Use the speed command for speed control
[Pr. 807 = 0]
Set the speed limit in the same method as speed
setting for speed control.
(speed setting by the PU (FR-DU07/FR-PU04/FR-
PU07), multi-speed setting, plug-in options, etc.)
The speed limit level is increased from 0Hz upon
turning ON of the start signal according to the
acceleration time set in [Pr. 7 Acceleration time] and is
decreased upon turning OFF of the start signal from
the then speed limit level to the DC injection brake
operation speed set in [Pr.10] to a stop in accordance
with the deceleration time set in [Pr. 8 Deceleration
time].
When the above speed limit command is greater than
the [Pr. 1 Maximum speed] value, the speed limit value
is the [Pr. 1 Maximum frequency] value, and when the
speed limit command is less than the [Pr. 2 Minimum
speed] value, the speed limit value is the [Pr. 2
Minimum frequency] value. Similarly when the speed
limit command is smaller than [Pr. 13 Starting
frequency], the speed limit value is 0Hz.
Initial
Name
value
0
60Hz
9999
0Hz
0%
60Hz
100%
0Hz
0%
60Hz
100%
(SL) appears on the operation panel during speed limit
operation and the OL signal is output.
Setting
Range
Use the speed command value during speed control as speed
0
limit.
According to [Pr. 808 and Pr. 809], set the speed limit in forward
1
and reverse rotation directions individually.
Forward/reverse rotation speed limit
The analog voltage of the terminal 1 input is used to make speed
2 limit.*
The speed limit of the forward rotation and reverse rotation is
switched according to the polarity
0 to120Hz Set the speed limit for the forward rotation direction.
0 to120Hz Set the speed limit for the reverse rotation direction.
9999 As set in [Pr. 808] .
0 to 400Hz Set the frequency (speed) on the bias side of terminal 1 input.
0 to 300% Set the converted % of the bias side voltage of terminal1 input.
0 to 400Hz Set the frequency (speed) of terminal 1 input gain (maximum).
0 to 300% Set the converted % of the gain side voltage of terminal1 input.
0 to 400Hz Set the frequency (speed) on the bias side of terminal 6 input.
0 to 300% Set the converted % on the bias side voltage of terminal 6 input.
0 to 400Hz Set the frequency (speed) of the (maximum) terminal 6 input gain.
0 to 300Hz Set the converted % on the gain side voltage of terminal 6 input.
Speed
Forward rotation
Speed setting
value during
speed control
Reverse rotation
STF (STR)
304
PARAMETER
Description
The speed setting
value is a speed
limit value.
[Pr.7] [Pr.8]
Torque controllable
range
ON OFF
Time