
Pr. | Operation at instantaneous |
261 to 266 power failure |
Pr.261 Power failure stop selection
Pr.262 Subtracted frequency at deceleration start
Pr.263 Subtraction starting frequency Pr.264
Pr.266 Power failure deceleration time switchover frequency
When a power failure or undervoltage occurs, the inverter can be decelerated to a stop or can be decelerated and re- accelerated to the set frequency.
Pr. | Setting Range |
| Description | |
Number |
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| Coasting to stop | |
| 0 (initial value) |
| When undervoltage or power failure | |
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| occurs, the inverter output is shut off. | |
| 1 |
| When undervoltage or a power failure | |
261 |
| occurs, the inverter can be decelerated | ||
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| to a stop. | ||
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| When undervoltage or a power failure | |
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| occurs, the inverter can be decelerated | |
| 2 |
| to a stop. | |
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| If power is restored during a power | |
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| failure, the inverter accelerates again. | |
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| Normally operation can be performed | |
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| with the initial value unchanged. But | |
262 | 0 to 20Hz |
| adjust the frequency according to the | |
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| magnitude of the load specifications | |
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| (moment of inertia, torque). | |
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| When output frequency ≥ Pr. 263 | |
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| Decelerate from the speed obtained | |
| 0 to 120Hz |
| from output frequency minus Pr. 262. | |
263 |
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| When output frequency < Pr. 263 | |
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| Decelerate from output frequency | |
| 9999 |
| Decelerate from the speed obtained | |
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| from output frequency minus Pr. 262. | ||
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264 | 0 to 3600/ 360s | * | Set a deceleration slope down to the | |
frequency set in Pr. 266. | ||||
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| 0 to 3600/ 360s | * | Set a deceleration slope below the | |
265 | frequency set in Pr. 266. | |||
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| 9999 |
| Same slope as in Pr. 264 | |
266 | 0 to 400Hz |
| Set the frequency at which the | |
| deceleration slope is switched from the | |||
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| Pr. 264 setting to the Pr. 265 setting. |
*When the setting of Pr. 21 Acceleration/deceleration time increments is "0" (initial value), the setting range is "0 to 3600s" and the setting increments are "0.1s", and when the setting is "1", the setting range is "0 to 360s" and the setting increments are "0.01s"
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Output |
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| Pr.264 | ||||||||
Subtracted |
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frequency | frequency at |
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deceleration start |
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| Pr.265 | |||||||
deceleration | Pr.262 |
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time switchover |
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frequency |
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| time 2 |
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Pr.266 |
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(1)Power failure stop mode (Pr.261 = “1”)
⋅If power is restored during power failure deceleration, deceleration to a stop is continued and the inverter remains stopped.To restart, turn off the start signal once, then turn it on again.
Power | supply | Pr.261 = 1 |
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| frequency | During deceleration at |
| occurrence of power failure | |
| During stop at | |
| occurrence of | |
| power failure | |
| Output | |
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| Time |
STF |
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Y46 |
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Turn off STF once to make acceleration again
(2)Instantaneous power
⋅When power is restored during deceleration after an instantaneous power failure, acceleration is made again up to the set frequency.
⋅When this function is used in combination with the automatic restart after instantaneous power failure operation, deceleration can be made at a power failure and acceleration can be made again after power restoration.
When power is restored after a stop by deceleration at an instantaneous power failure, automatic restart operation is performed if automatic restart after instantaneous power failure has been selected (Pr. 57 ≠ "9999")
Pr.261 = 2 | When power is restored during | |
deceleration | ||
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Power |
| IPF |
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supply |
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Output |
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frequency | During deceleration |
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| at occurrence of | Reacceleration |
| power failure | |
| Time | |
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Y46 |
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Pr.261 = 2, Pr.57 9999 | When used with automatic restart |
after instantaneous power failure |
| During power failure | |
Power |
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supply |
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Output |
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frequency | Automatic restart | |
During deceleration | ||
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at occurrence of | after instantaneous | |
power failure | power failure | |
| Time |
Reset time + Pr.57
Y46
Pr. 267 Refer to the section about Pr. 73 and other relevant parameters.
Pr. 268 Refer to the section about Pr. 52 and other relevant parameters.
Pr. 269 Parameter for manufacturer setting. Do not set.
Pr. | 299 |
| Refer to the section about Pr. 57 and other | ||
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| relevant parameters. | ||||
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Pr. | 331 to 337 | Refer to the section about Pr. 117 and | |||
other relevant parameters. | |||||
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43 | Pr. indicates simple mode parameters and Pr. indicates extended parameters. When setting parameters, refer to the instruction manual (applied) and understand instructions. |