Cascade Controller Option
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Changed systemstop functions
Two stop functions are provided by the cascade
controller option. One function quickly stops a
system. The other stages off pumps in a sequence,
allowing for a controlled pressure stop.
Do not use these functions as emergency
stops. Some functions do not turn
off all pumps.
Standard cascade control mode
Stop functions in Standard cascade control are
described in the table below. In a sequenced
stop, there is a one ramp-down time delay
between each staging off of motors.
Standard Cascade Control
Function
Description
OFF/STOP key
Provides a sequenced stop
for all constant speed motors
in opposite order as staged
on. Controller decelerates its
motor to a stop.
STOP via
Terminals 16 and
17 (parameters
300 and 301)
Controller decelerates its
motor to a stop. With motor
stopped, controller provides
sequenced stop for constant
speed motors.
STOP via
Terminal 18
(parameter 302)
Constant speed motors
continue to operate normally
with feedback signal from
drive. Controller decelerates
its motor to a stop.
STOP via
Terminal 27
Coast Inverse
(parameter 304)
Constant speed motors stop
immediately. Controller coasts
its motor to a stop.
STOP via
Terminal 27
Safety Interlock
(parameter 304)
Constant speed motors stop
immediately. Controller coasts
its motor to a stop.
Master/Slave cascade control mode
Stop functions in Master/Slave cascade control
are described in the table below.
Master/Slave Cascade Control
Function
Description
OFF/STOP key
Provides a sequenced
stop for all slave motors
in opposite order as
staged on.
Master decelerates its
motor to a stop.
STOP via Terminal 16
and 17 (parameters 300
and 301)
Slave motors all stop
together.
Master
decelerates its motor to
a stop.
STOP via Terminal 18
(parameter 302)
Slave motors all stop
together.
Master
decelerates its motor to
a stop.
STOP via Terminal
27 Coast Inverse
(parameter 304)
Slave motors all stop
together. Master coasts
its motor to a stop.
STOP via Terminal
27 Safety Interlock
(parameter 304)
Slave motors all stop
together. Master coasts
its motor to a stop.
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Serial communications(parameter 500)
The Danfoss FC protocol may be used only with
VLT Dialog software for programming and setting
up drive and cascade controller parameters.
MG.60.I3.02 - VLT is a registered Danfoss trademark
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