Rockwell Automation FlexPak 3000 Digital DC Drive Version 4.3 - Manual (Page 68)

5-20 FlexPak 3000 DC Drive Software Reference
5.7 Configuring Parameters for Winding Applications
These options are only available when using the AutoMax Network Communication
board (
CONTROL SOURCE SELECT is set to NETWORK and NETW REGISTER MAP SEL
(P.914) is set to 2 ( ALTERNATE )) or when using the ControlNet Network Communication
board.
For diameter-dependent loads, you can scale the feedback to the speed loop. The
feedback is scaled through a multiplier block. The operation of the multiplier block is:
Where:
• A is a speed feedback multiplier (gain)
• B is the speed feedback from the lead/lag block output
When NETW REGISTER MAP SEL (P.914) is set to ALTERNATE , the source for A is the
network register SPEED FEEDBACK GAIN (alternate map, Drop_1, register 38). Even if
the multiplier block is not being used, you must write a value of 1000 to the SPEED
FEEDBACK GAIN register whenever writing to Drop_1. This sets the multiplier block to
unity gain.
If the web is underwound, set UNDERWIND ENABLE (alternate map, Drop_1, register 32,
bit 5) to ENABLE . This enables two inverters, one in the speed loop feedback path
immediately before the feedback summing junction, and one at the input to the CML
limit block.
Refer to the appropriate network communication manual for register map
assignments.
A B •
1000
-------------