PowerFlex Digital DC Drive User Manual - Publication 20P-UM001C-EN-P - July 2008
C-8 Application Notes
Inverting Fault Device Configuration
1. Connect the inverting fault device contact to a digital input.
2. Set the corresponding [Digital Inx Sel] parameter (133-144) to 14 - "Aux
Fault".
3. Set the corresponding [Inversion In x] parameter (1276-1283 or
1387-1390) to 1 - “Enabled”.
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. (Refer to the
complete “PID Control” block diagram on page D-17
.)
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 C-9
)
❏ Closed loop dancer / load cell feedback (see Configure the
Feedback Signal in the Follower Drive(s) on page C-10)
❏ Tension set point (see Configure the Tension Set Point Signal in the
Follower Drive(s) on page C-12)
• Torque winder with a load cell and tension control
❏ Line speed signal (see Configure a Line Speed Signal on page C-9
)
❏ Closed loop dancer / load cell feedback (see Configure the
Feedback Signal in the Follower Drive(s) on page C-10)
❏ Tension set point (see Configure the Tension Set Point Signal in the
Follower Drive(s) on page C-12)
!
ATTENTION: If a dynamic brake resistor is used with one of
the configurations detailed above, dynamic braking stop time
will be extended when the digital input configured as 35 - “Fld
Weak En” is asserted. Equipment damage and/or personal injury
may result if one of these configurations is used in an
inappropriate application. Do not use one of these configurations
without considering applicable local, national and international
codes, standards, regulations or industry guidelines.
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