GE VAT2000 Instruction Manual page 59

Symbol Name
BUP Ratio interlock
bias increase
BDW Ratio interlock
bias decrease
IVLM Bias BUP/BDW
selection
AUXDV Auxiliary drive
selection
PICK Pick-up
EXC Pre-excitation
ACR ACR
PCTL P Control
LIM1 Drive torque
limit
changeover
LIM2 Regenerative
torque limit
changeover
MCH Machine time
constant
changeover
RF0 0 setting
DROOP Drooping
changeover
DEDB Dead band
setting
TRQB1 Torque bias
setting 1
TRQB2 Torque bias
setting 2
PIDEN PID control
selection
(Note) ASR: Automatic Speed Regulator
ACR: Automatic Current Regulator
5. Control Input / Output
Table 5-3 Programmable sequence input functions (2)
When IVLM is ON, the ratio interlock function increases or decreases the
frequency setting output by BUP or BDW functions. The motor increases
or decreases its speed according currently valid ramp rate.
When IVLM turns OFF, the bias increase/decrease value will be cleared
to zero, and BUP/BDW operation will be disabled.
The dual drive settings are validated with this signal.
While this signal is ON, pick-up (flying start) operation is effected as soon
as RUN or R RUN is ON.
Pre-excitation is applied to the motor. Pre-excitation consist to
establishing only the flux in the motor without generating toque. This is
useful when high torque is required immediately at the start time.
ACR operation is selected.
ASR control is changed from the PI control to the P control.
When this function is ON, is possible to control the drive torque limit, by
an analog input signal or by a serial transmission signal.
When this function is ON, is possible to control the regenerative torque
limit, by an analog input signal or by a serial transmission signal.
This function allows ASR gain changeover from two machine time
constant values.
machine time constant 1 (A10-1) is available if MCH is OFF.
Machine time constant 2 (B15-0) is available if MCH is ON.
The speed setting is changed to 0 rpm.
Drooping function is validated. (B13-5)
The dead band setting of ASR is validated. (B14-0)
The torque bias input 1 is valid.
The torque bias input 2 is valid.
The PID control is validated. Useful function for slow processes control
Function
5-6