AV-300i Version 2 User’s Guide
—————— Function Description ——————
Ch.1
141
1.15 PID CONTROL (APPL FUNCTION)
The PID control is a free standing generic regulator inside the drive software.
It has the flexibility to tie the regulation of any process variable to drive speed or torque control, internal to the
drive.
Common applications of PID regulation are:
Nip roll with dancer or load cell
Winder with dancer or load cell
Unwinder with dancer or load cell
L
Pumps:
line pressure, tank level
Fan: static pressure, airflow
F
fuel pumps: line pressure, flow
P
Extruders:
head pressure, temperature
Parameters for the PID feature are found under the APPL FUNCTION menu.
NOTE! The PID function cannot be used at the same time as the Power Loss control feature
The PID application examples fall under two categories:
1.
process control - The process regulator is dynamic straightforward adjustment of the speed or torque setpoint
of the drive to maintain the pressure, position, flow, temperature, etc.as needed by the process.
Examples follow in sections 1.16.1, 1.16.2, 1.16.6 and 1.16.7
2.
winder & unwinder control - The process regulator serves to scale a linespeed reference to account for
material build up/ build down, proportional to the material diameter change.
· The PID control allows the preset of the PID starting point for unwinding/winding rolls of varying sizes.
· The diameter calculator feature, is a command to use the motor rotation and dancer position change to
calculate material diameter before running the drive. This is a diameter preset feature without the need for
external diameter sensing devices.
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