Changed Drive Functions; Introduction - Danfoss Cascade Operating Instructions Manual

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.
Changed Default Settings with the Cascade Controller Option Card
Parameter Description
100 Configuration
201 Minimum output freq.
205 Maximum reference
206 Ramp-up time
207 Ramp-down time
304 Terminal 27 (digital input)
308 Terminal 53 (analog in V)
314 Terminal 60 (analog in A)
318 Function after time out
417 Feedback Function
427 PID lowpass filter time
VLT Type
8005/6002
8016/6016
8072/6072
8350/6350
MG.60.I3.02 - VLT is a registered Danfoss trademark
Previous default
Open loop
0.0 Hz
60 Hz
Varies with unit
Varies with unit
Safety interlock
Reference
Reference
No function
Maximum
0.01 sec.
8011/6011
8062/6062
8300/6275
8600/6550
Cascade Controller Option
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.
New default
Closed loop
40% of nominal frequency
(24 Hz)
100%
See table below
See table below
Coasting stop, inverse
No operation
Feedback (4 20 mA)
Stop (sequence stop)
Virtual Control Curve
0.20 sec.
Ramp Up (parameter
206)
1 sec.
3 sec.
5 sec.
8 sec.
Ramp Down(parameter
207)
1 sec.
2 sec.
3 sec.
5 sec.
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