GE Industrial Solutions DV-300 DC Drive Users Manual - Manual (Page 266)

GEI-100332Ga
——— FUNCTION DESCRIPTION ———
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6.16.3.1 General
The PID function has been developed for general uses which can include nip-roll, winders, unwinders, pressure
control of pumps and extruders.
A dancer or a load cell can be used as position/tension transducer.
The inputs (with the exception of those concerning the transducers) and the outputs can be configured, they
can be associated to various converter parameters. E.g. the PID output can be sent to the speed or to current
regulator.
The analog inputs/outputs will be sampled/updated to 2ms.
The digital inputs/outputs will be sampled/updated to 8ms.
n
ote
! PID function in the firmware can not be used when the DGF card is present.
6.16.3.2 Inputs / Outputs
Regulation Inputs/outputs
PID source Sample parameter of Feed-forward normally programmed on analog input.
PID feed-back Analog input of position / tension transducer (dancer/load cell).
PID feed-back must be programmed on the analog input 1 (terminals 1-2) because of
the input filter provided.
PID offset 0 Offset analog input added to PID feed-back. Used for the adjustement of the dancer position.
PID target Parameter associated with the regulator output. Normally, it will be programmed on
the speed reference of the drive.
PID output Analog output of the regulator. Used to carry on a reference cascade in multidrives systems.
PI central v3 PID Initial value setting of the integral component of the regulator (corresponds to initial
diameter). It can be programmed on an analog input. E.g. to an ultrasonic transducer
used for the diameter measure of a winder/unwinder.
Input Command (programmable on digital inputs)
Enable PI PID Enable of the PI (proportional - integral) of the regulator.
Enable PD PID Enable of the PD (proportional - derivative) of the regulator.
PI integral freeze: Freezing of the actual value of the integral component of the regulator.
PID offset sel Offset select, in addition to PID feed-back: L = PID offset 0, H = PID offset 1.
PI central v S0 Used with PI central v S1 to select one of four values for the initial integral level (cor-
responding to initial diameter). Through binary seletion.
PI central v S1 Used with PI central v S0 to select one of four values for the initial integral level (cor-
responding to initial diameter). Through binary seletion.
Diameter calc Enable of the initial diameter calculation.
Diameter calc st State of the initial diameter calculation (digital output).