Applications Examples For The Pid Function; Control Of Nip Rolls With Dancer; Machine Data; Input/Output - GE AV-300i User Manual

1.16 APPLICATIONS EXAMPLES FOR THE PID FUNCTION

1.16.1 Control of Nip Rolls with Dancer

1.16.1.1 Machine Data

Rated speed of the Slave motor Vn = 3000rpm
Slave motor speed corresponding to the max. line speed = 85% Vn = 2550rpm
Maximum dancer correction = +/- 15% of the line speed = +/- 382.5rpm
The Drive of the Slave nip roll has to receive the analog signals referring to the line speed and to the Dancer
position (whose potentiometer will be power supplied at its ends with values included between –10V...+ 10V)
and the digital commands referring to the PID control enabling.
The output of the PID regulator is sent to the speed 1 reference.

1.16.1.2 Input/Output

Drive settings: (only those referring to the PID function are described)
Connect to the analog input 1 the dancer cursor.
Select PID fbk src = An inp 1 output
Connect to the analog input 2 the line speed reference (feed- forward).
Select PID inp FF src = An inp 2 output
AV-300i Version 2 User's Guide
Master
Dancer
M E
DRIVE
(Internal ramp
master drive)
Line speed
reference
Forward
+10V
Reverse
-10V

Figure 1.16.1.1: Control of Nip Rolls with Dancer

—————— Function Description ——————
Nip-roll
Reverse
Forward
+10V
5Kohm
M E
-10V
DRIVE
Feed-back
Feed-forward
Ch.1
155