AC70 VC CONTROL FREQUENCY INVERTER MANUAL
FUNCTION PARAMETER DETAILED SPECIFICATION
98
Short connecting with COM stands for ON, disconnecting for OFF
Multi-step control
terminal 4
Multi-step control
terminal 3
Multi-step control
terminal 2
Multi-step control
terminal 1
Terminal
Step
Speed
OFF OFF OFF ON 1X
OFF
OFF ON OFF 2X
OFF OFF ON ON 3X
OFF ON OFF OFF 4X
OFF ON OFF ON 5X
OFF ON ON OFF 6X
OFF ON ON ON 7X
ON OFF OFF OFF 8X
F-17-F-18 Reverse
F-19
Speed search tracking speed
Range:0.1-10.0% Default:
0.2%
F-20
Voltage stores time
Range:0.10-10.00s Default:
0.60s
F-21
Speed search respond current
threshold value
Range:10-200% Default:
120%
This group parameters will be use in software speed search mode. Software speed search will detect out the motor
speed from current, and stores voltage based on
[F-20]
voltage stores time under upper limit frequency or given
frequency. When the output current bigger than
[F-21]
, inverter will lower the output frequency with
[F-19]
speed
search speed tracking. When the current lower than
[F-21]
and maintain
[E-62]
time setting, it judges the output
frequency and motor speed is synchronous, will accelerate or decelerate to frequency reference given. Software
speed search processing schematic as following tale:
Note: The motor may decelerate suddenly when drive a light load.
F-22
Frequency reducing acceleration time Range:0.1-6500.0s
Default:
2.0s
F-23
Frequency reducing deceleration time Range:0.1-6500.0s
Default:
0.3s
Frequency reducing accel/decel. time:
When parameters[E-67] is set to “2****”, inverter will reduce frequency
