Owner's manual

Rockwell Automation Publication 20P-UM001I-EN-P - February 2013 275
Application Notes Appendix C
PID Function
The PID function is used to increase or reduce the reference signal output to the
speed or current regulator of the drive. The PID function can be used for nip-
roll, winder/unwinder, roll doctor/salvage machine, pump and extruder pressure
control and extruder temperature control applications. (See the complete “PID
Control” block diagram on page 330
.)
Examples are included below for configuring the following applications:
• Speed winder with a load cell and tension control
❏ Line speed signal (see Configure a Line Speed Signal on page 276
)
❏ Closed loop dancer / load cell feedback (see Configure the Feedback
Signal in the Follower Drive(s) on page 277
)
❏ Tension set point (see Configure the Tension Set Point Signal in the
Follower Drive(s) on page 279
)
• Torque winder with a load cell and tension control
❏ Line speed signal (see Configure a Line Speed Signal on page 276
)
❏ Closed loop dancer / load cell feedback (see Configure the Feedback
Signal in the Follower Drive(s) on page 277
)
❏ Tension set point (see Configure the Tension Set Point Signal in the
Follower Drive(s) on page 279
)