ABB ACS560 Firmware Manual page 55

22.11 Ext1 speed ref1
PID setpoint
or
Process
PID
PID actual
Notes:
• The above settings are for Ext1 control location. Accordingly, you can set for Ext2
control location.
• The examples provided in this chapter are based on PID set 1. You can set the
desired values for PID trim function's parameters to get the expected result.
The following modes are available:
• Direct
• Proportional, and
• Combined
Direct
The direct method is suitable where you need tension control at fixed rpm/line speed.
In this mode, the PID trimmed output
the maximum speed (parameter
torque 1) or frequency
be made by parameter
The calculated trimmed output is same throughout the speed range with respect to
the stable PID output.
The 40.05 Process PID trim output act
Par40.01

------------------------ -
Par40.05 =

100
40.05 Process
PID trim output
(40.05 Process PID trim output
30.12 Maximum
(30.14 Maximum frequency). The selection between these can
40.52 Set 1 trim selection.
is calculated using below formula:

 
Par30.12 or 30.20 or 30.14

22.13 Ext1 speed
function =
Add (ref1 + ref2)
22.12 Ext1 speed ref2
speed), torque
 Par40.55 
Program features 55
Ramp input
act) is relative to
(30.20 Maximum