
74 Program features
metal process industries, infeed and outfeed of rotogravure printing machines, and
surface winders.
The examples provided in this chapter are based on PID set 1. You can set the
desired values for the PID trim function parameters to get the expected result.
When PID trim is activated, bit 5 Trim mode is set to 1 in parameter
See the speed, torque and frequency reference chains in chapter
for more information on the PID trim addition to the respective reference
chains.
The following PID trim modes are available:
•
•
•
.
Direct
The direct method is suitable when you need tension control at fixed rpm/line speed.
In this mode, the PID trim output (parameter
relative to the maximum speed (parameter
). You can make the
selection with parameter
.
The calculated trimmed output actual is the same throughout the speed range with
respect to the stable PID output.
The
value is calculated using the following formula:
Tension measurement
Drive rollers (pull)
Speed controlled conveyor line
Par40.05
Par40.01
100
------------------------
Par30.12 or 30.20 or 30.14
Par40.55
=
ACS180 FW.book Page 74 Tuesday, March 9, 2021 2:25 PM