Emerson Vilter VilTech Operation And Service Manual page 117

Definitions of the terms used in the Motor Speed screen.
Term
Proportional
Constant
Integration Time
Derivative Time
Control Mode
Manual Speed
VFD Control Type
VFD Single Channel Analog Output Card and Jumper Settings.
Definition
Adjusts the speed based on how far the control
parameter currently is from the control setpoint. A higher
P term causes a greater speed changes when far from the setpoint.
Adjusts speed based on how rapidly the
control parameter should approach the setpoint. A higher
I term causes a slower approach to the setpoint when the
control parameter is not changing.
Adjusts the speed based on the past value
of the control parameter. A large D term may result in large
fluctuations in the speed.
Care must be taken to keep D as low as possible.
The control for the VFD.
Automatic lets the VILTech select proper speed.
The VFD speed when Manual mode is selected.
The 4-20mA control signal may be set to direct or reverse.
When set to Direct, 4mA is low speed and 20mA is high speed.
When set to Reverse, 20mA is the low speed and 4mA is high speed.
This control is useful for testing purposes.
Range
0:1000
0:1000 sec
0:1000 sec
Automatic/Manual/Tuning
50-100 PCT
Direct/Reverse
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