Instruction manual

Cascade Controller Option
Changed Drive
functions
■ 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 Controller decelerates its
motor to a stop. Provides
a sequenced stop for all
constant speed motors in
opposite order as staged on.
STOP via
Terminals 16 and
17 (System Start
parameters 300
or 301)
Provides a sequenced stop
for all constant speed motors
in opposite order as staged
on. Controller decelerates its
motor to a stop.
STOP via
Terminal 18 (Start
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.
NOTE
Should the frequency converter trip for any
reason, the cascade controller can continue
operation with the remaining pumps. Only
at live zero where par. 315 Live zero functionality is
set to [STOP] or [STOP AND TRIP] or at warning 8
[DC UNDERVOLTAGE] all pumps will stop.
M
aster/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 Master decelerates
its motor to a stop.
Provides a sequenced
stop for all slave motors
in opposite order as
staged on.
STOP via Terminal 16
and 17 (System Start
parameters 300 or 301)
Provides a sequenced
stop for all slave motors
in opposite order as
staged on.
Master decelerates its
motor to a stop.
STOP via Terminal 18
(Start 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.
NOTE
Should the frequency converter trip for
any reason, the cascade controller will
cause the sy
stem to stop.
■ Serial com
munications (parameter 500)
The Danfoss FC protocol may be used only with
MCT 10 software for programming and setting up
drive and
cascade controller parameters.
MG.60.I5.22 - VLT is a registered Danfoss trademark
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