Rockwell Automation WebPak 3000 DC Drive Application Workbook Version 1.1 - Manual (Page 30)

4-2 WebPak 3000 DC Drive Application Workbook, Version 1.1
The composite CML reference signal, read as CML RAMP INPUT TP (P.390), passes
through an amplitude limit block and a rate limit block. The amplitude limit block
prevents the reference signal from becoming greater than or less than the limits
selected by
CML REF LIMIT SELECT (P.311). The rate limit block limits the rate of change
of the selected CML reference based on the value you input for CML REF RATE LIMIT
(P.303).
The amplitude- and rate-limited CML reference appears as the output parameter CML
REFERENCE (P.396).
þ
To configure the current minor loop reference:
▲
Set INERTIA COMP SELECT (P.221) to select the source of the inertia
compensation signal. The choices are:
NONE - No inertia compensation signal is added to the current minor loop
reference.
CALCULATOR - The drive uses the output of the inertia compensation calculator
( INERTIA COMPENSATION (P.244)).
NETW IN REG 1, 2, 3 - The drive uses a network value.
▲
Set LOSSES COMP SELECT (P.315) to select the source of the losses
compensation signal. The choices are:
NONE - No losses compensation signal is added to the current minor loop
reference.
CALCULATOR - The drive uses the output of the losses compensation calculator
( LOSSES COMPENSATION (P.316)).
NETW IN REG 1, 2, 3 - The drive uses a network value.
▲
Set OCL TYPE 3 POSN REG EN (P.814) to select the source of the current minor
loop reference. The choices are:
DISABLED - TORQUE REFERENCE (P.189) is used as the CML reference.
ENABLED - OCL OUTPUT (P.848) is used as the CML reference. This enables you
to configure the outer control loop as a type 3 position loop. This design
bypasses the speed loop. The position loop vernier signal is connected
directly to the current minor loop.
This design eliminates the need to provide a motor speed feedback device.
However, the trade-off is that it may be difficult or, in some system
configurations, impossible to achieve stable operation.
Note that OCL SELECT (P.817) must be set to POSITION to use this feature.
.
Range: NONE , CALCULATOR , NETW IN REG 1, 2, 3 P.221 =
Range: NONE , CALCULATOR , NETW IN REG 1, 2, 3 P.315 =
!
ATTENTION: The J15 jumper must be set to the torque/current position
when using the WebPak 3000 drive’s type 3 position loop feature
(P.814 =
ENABLED ). Applying a drive as a direct current regulator has
safety issues that must be considered. Failure to observe this precaution
could result in severe bodily injury or loss of life.
Range: DISABLED , ENABLED P.814 =