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Power Failure-time Deceleration-to-stop Function (pr. 261 To Pr. 266) - Mitsubishi Electric FR-A500 Instruction Manual

Transistorized inverter.
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4.2.59 Power failure-time deceleration-to-stop function (Pr. 261 to Pr. 266)

Pr. 261"power failure stop selection"
Pr. 262"subtracted frequency at deceleration
start"
Pr. 263"subtraction starting frequency"
Pr. 264"power-failure deceleration time 1"
Pr. 265"power-failure deceleration time 2"
Pr. 266"power-failure deceleration time switch-over frequency"
When an instantaneous power failure or undervoltage occurs, the inverter can be decelerated to a stop.
Remove the jumpers from across terminals R-R1 <L1-L11> and terminals S-S1 <L2-L21> and connect
terminal R1 <L11> to terminal P <+> and terminal S1 <L21> to terminal N <->.
Parameter
Factory Setting
Number
261
262
3Hz
263
60Hz <50Hz>
264
5 s
265
9999
266
60Hz <50Hz>
Power supply
Switch-over frequency
<Setting>
Parameter
Setting
Number
261
262
0 to 20Hz
0 to 120Hz
263
Pr. 21 = 0
0 to 3600 s
264
Pr. 21 = 1
0 to 360 s
Pr. 21 = 0
0 to 3600 s
265
Pr. 21 = 1
0 to 360 s
266
0 to 400Hz
Setting Range
0
0, 1
0 to 20Hz
0 to 120Hz, 9999
0 to 3600/0 to 360 s
0 to 3600/0 to 360 s, 9999
0 to 400Hz
Subtracted frequency
Pr.262
Pr.266
Coasting to stop
0
When undervoltage or power failure occurs, the inverter output is shut off.
1
When undervoltage or power failure occurs, the inverter is decelerated to a stop.
Normally, operation can be performed with the factory setting unchanged. The frequency can
be adjusted within the range 0 to 20Hz according to the load specifications (moment of inertia,
torque).
If the output frequency at occurrence of undervoltage or power failure is equal to or greater
than the frequency set in Pr. 263, deceleration starts at the value found by subtracting the
frequency set in Pr. 262 from the output frequency at that time. If the output frequency at
occurrence of undervoltage or power failure is less than the frequency set in Pr. 263, the
inverter is decelerated to a stop, starting at the output frequency at that time.
The inverter is decelerated to a stop, starting at the value found by subtracting the frequency
9999
set in Pr. 262 from the output frequency at occurrence of undervoltage or power failure.
Set a deceleration slope down to the frequency set in Pr. 266. Set the slope in terms of time
required for deceleration from the frequency set in Pr. 20 to 0Hz.
Set a deceleration slope below the frequency set in Pr. 266. Set the slope in terms of time
required for deceleration from the frequency set in Pr. 20 to 0Hz.
9999
Same slope as in Pr. 264
Set the frequency at which the deceleration slope is is switched from the Pr. 264 setting to the
Pr. 265 setting.
Related parameters
Pr. 12 "DC injection brake voltage"
Pr. 20 "acceleration/deceleration
reference frequency"
Pr.264
Power-failure deceleration time 1
Pr.265
Power-failure deceleration time 2
Time
Description
168
PARAMETERS

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