BENSHAW RSi GX Series, Hardware Manual

Page: 104 / 168

H50: PID Feedback Select
Range:
0 - Terminal I input (0-20mA), 1 - Terminal V1 input (0-10V)
Description:
H50 [PID Feedback Select] selects the feedback signal for PID control. This
can be set to either ‘I’, ‘V1’ according to the feedback signal (current or
voltage) and the terminal (V1 or V2).
For HVAC or Pump applications, the PID control can be used to adjust the
actual output by comparing a feedback with a ‘Set-point’ given to the drive.
This ‘Set-point’ can be in form of Speed, Temperature, Pressure, Flow level,
etc. Both the‘Set-point’ and the feedback signals are provided externally to
the drive analog input terminals V1, V2 or I. The drive compares the signals
in calculating ‘total-error’ which is reflected in the drive output.
To use this function, H40 must be set to ‘PID’.
z
Note:
PID control can be bypassed to manual operation temporarily by
defining one of the multifunction input terminals (P1~P3) to “Open-loop”.
The drive will change to manual operation from PID control when this
terminal is ON, and change back to PID control when this terminal is OFF.
H51: P Gain for PID Controller
Range:
0-999.0% (Default: 300.0%)
Description:
This parameter sets the proportional gain for PID control.
H52: I Gain for PID Controller
Range:
0.1-32.0 sec. (Default: 1.0 sec.)
Description:
This parameter sets the integral gain for PID control.
H53: D Gain for PID Controller
Range: 0-30.0 sec. (Default: 0.0 sec.)
Description: This parameter sets the differential gain for PID control.
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6 - Parameter Descriptions