Mitsubishi Electric FR-A700 Series, Technical Manual

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PARAMETER
2.10.3 Speed limit [Pr. 807 to Pr. 809, C12 to C15 (Pr. 917, 918), C30 to C33(Pr. 926, 927))
(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.
(SL) appears on the operation panel during speed limit
operation and the OL signal is output.
(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.
A700
[Pr. ] Name
Initial
value Setting
Range
Description
807 Speed limit selection 0
0
Use the speed command value during speed control as speed
limit.
1
According to [ Pr. 808 and Pr. 809 ], set the speed limit in forward
and reverse rotation directions individually.
2
Forward/reverse rotation speed limit
The analog voltage of the terminal 1 input is used to make speed
limit.*
The speed limit of the forward rotation and reverse rotation is
switched according to the polarity
808 Forward rotation speed limit 60Hz 0 to120Hz Set the speed limit for the forward rotation direction.
809 Reverse rotation speed limit 9999
0 to120Hz Set the speed limit for the reverse rotation direction.
9999 As set in [ Pr. 808 ] .
C12(917) Terminal 1 bias frequency (speed) 0Hz 0 to 400Hz Set the frequency (speed) on the bias side of terminal 1 input.
C13(917) Terminal 1 bias (speed) 0% 0 to 300% Set the converted % of the bias side voltage of terminal1 input.
C14(918) Terminal 1 gain frequency (speed) 60Hz 0 to 400Hz Set the frequency (speed) of terminal 1 input gain (maximum).
C15(918) Terminal 1 gain (speed) 100% 0 to 300% Set the converted % of the gain side voltage of terminal1 input.
C30(926)
Terminal 6 bias frequency (speed)
0Hz 0 to 400Hz Set the frequency (speed) on the bias side of terminal 6 input.
C31(926) Terminal 6 bias (speed) 0% 0 to 300% Set the converted % on the bias side voltage of terminal 6 input.
C32(927) Terminal 6 gain frequency (speed) 60Hz 0 to 400Hz Set the frequency (speed) of the (maximum) terminal 6 input gain.
C33(927) Terminal 6 gain (speed) 100% 0 to 300Hz Set the converted % on the gain side voltage of terminal 6 input.
* When FR-A7AZ is installed, forward/reverse rotation speed limit using terminal 6 is also available.
STF (STR)
ON OFF
Speed
Forward rotation
Speed setting
value during
speed control
[ Pr.7 ]
Time
Torque controllable
range
The speed setting
value is a speed
limit value.
[ Pr.8 ]
Reverse rotation