GK600 User Manual
Chapter 6 Specification of Parameters
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d2-09
ACR proportion coefficient
Kp
Range: 0.000~4.000
Factory default:
1.000
d2-10
ACR integration coefficient
Ki
Range: 0.000~4.000
Factory default:
1.000
These two parameters determine the characteristics of automatic current regulator (ACR)
under SVC pattern. Increment of proportion coefficient and/or integration coefficient can
shorten torque response time. Reduction of proportion coefficient an/or integration coefficient
can increase the stability of the system. Inappropriate setting may bring about system
oscillation. Factory default is not needed to be changed in most cases.
d2-11
Pre-excitation time
Range: 0.000s~5.000s
Factory default:
0.200s
Applies to asynchronous motor. To attain quick start, it is necessary to perform pre-excitation
before the running of motor, and the pre-excitation time is set by this parameter. Properly
establish stable flux prior and then ramp up quickly. The set value of 0.000s means "no
pre-excitation" and ramp up at the moment of the receipt of run command. Pre-excitation time
is not included in Accel/Decel time. Factory default is suggested to maintain in most cases.
d2-12
Driven torque restriction
source
Range: 0~5
Factory default: 0
Under the pattern of SVC speed control, and when the motor is driving an electric-driven load, it
usually needs to restrict the output torque of the motor. This parameter sets the torque
restriction source.
0: d2-14 digital setting
Restrict output torque through digital set parameter d2-14. 100% corresponds to motor rated
torque.
1: AI1
2: AI2
3: EAI (on IO option board)
Limit the torque through analog input. The limited range is "0~200%r x rated torque".
4: X6/DI pulse input
Restrict the torque through X6/DI pulse input. The limited range is "0~200%r x rated torque".
5: Communication
A superior device sets the restricted value of the output torque through standard RS485
communication interface at the drive. Refer to parameter Group H0 and appendix for details
of communication.
d2-13
Braking torque restriction
source
Range: 0~5
Factory default: 0
Under the pattern of SVC speed control, and when the motor is driving a power generating load,
