Cascade Controller Option
Changed Drive functions
■
Changed Drive functions
■
Introduction
Installation of the Cascade Controller Option card
into the VLT adjustable frequency drive overrides
some existing drive functions. Changes to the default
parameter setting are shown in the tables below.
Data entered into the drive parameters are used
to program the drive and cascade controller for
system operation. The modified parameter default
settings make programming the cascade controller
easier. See Chapter 5, User Interface, for instructions
on programming drive parameters.
In addition, parameters that need to be programmed
for cascade control operation are assembled
sequentially in a new and expanded 39 item Quick
Menu. Programming is simplified by following the
Quick Menu items in sequence for either Standard
cascade control or Master/Slave cascade control.
The new Quick Menu is described in Chapter 6,
VLT
Drive and Cascade Controller Card Setup.
New options are also available to stop pumps or fans
controlled in cascade operation. A summary of VLT
changed functionality is presented in this chapter.
Changed Default Settings with the Cascade Controller Option Card
Parameter
Description
Previous default
New default
100
Configuration
Open loop
Closed loop
201
Minimum output freq.
0.0 Hz
40% of nominal frequency
(24 Hz)
205
Maximum reference
60 Hz
100%
206
Ramp-up time
Varies with unit
See table below
207
Ramp-down time
Varies with unit
See table below
304
Terminal 27 (digital input)
Safety interlock
Coasting stop, inverse
308
Terminal 53 (analog in V)
Reference
No operation
314
Terminal 60 (analog in A)
Reference
Feedback (4 20 mA)
318
Function after time out
No function
Stop (sequence stop)
417
Feedback Function
Maximum
Virtual Control Curve
427
PID lowpass filter time
0.01 sec.
0.20 sec.
VLT Type
Ramp Up (parameter
206)
Ramp Down(parameter
207)
8005/6002
8011/6011
1 sec.
1 sec.
8016/6016
8062/6062
3 sec.
2 sec.
8072/6072
8300/6275
5 sec.
3 sec.
8350/6350
8600/6550
8 sec.
5 sec.
MG.60.I3.02 - VLT is a registered Danfoss trademark
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