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MHT260a (Engl.)
(12) System parameter 82, 83［Basic type, SX bus, T-link］
Para. Name Setting range Initial value Change
82 Brake operation time 0.01 to 9.99 [s] (in 0.01 step) 0.50 Always
83 Brake releasing time 0.01 to 9.99 [s] (in 0.01 step) 0.20 Always
System para. 82 and 83 are the time setting of brake timing output.
If the external brake is used, setting change of system para. 81 is needed.
Brake operation time : Time period from when the motor shaft has been stopped, to when the P-action signal is on.
Brake releasing time : Time period from when manual forward or origin return command is on, to when the motor begins running.
(13) System parameter 84, 85［Basic type, SX bus, T-link］
Selects the operation when undervoltage at main circuit input is detected.
Para. Name Setting range Initial value Change
84 Operation at undervoltage 0: Rapid deceleration to a stop
1: Free-run
0 Power
85 Alarm detection at undervoltage 0: No detection
1: Detects
1 Power
■ Operation at undervoltage (system para. 84)
Specifies the motor operation when undervoltage has been detected while the run command [RUN] is on.
Setting range Operation
0: Rapid decel. to a stop The motor rapidly decelerates to a stop (within amplifier’s highest capacity).
1: Free-run The motor decelerates (or accelerates) with free-run condition according to the load torque.
■ Alarm detection at undervoltage (system para. 85)
Specifies the alarm detection operation when undervoltage has been detected while the run command [RUN] is on.
Setting range Operation
0: No detection Alarm is not detected.
1: Detects Undervoltage alarm is detected.
If “0” has been set, the motor stops according to the preset operation to be made at undervoltage, and alarm detection will not be output.
Remark: If the power voltage decrease (undervoltage) due to momentary power failure is detected, the motor decelerates by system para.
84 setting. Due to regenerative power generated by the motor during deceleration, voltage level may exceed undervoltage level.
In this case, the motor starts deceleration at the undervoltage level. After that, the motor will accelerate again after alarm detection
of undervoltage is released.
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