NOTE
If in Fire Mode it is desired to use the Live Zero function, then
it will also be active for analog inputs other than that used
for Fire Mode setpoint / feedback. Should the feedback to
any of those other analog inputs be lost, for example a cable
is burned, Live Zero function will operate. If this is
undesirable then Live Zero function must be disabled for
those other inputs.
Desired Live Zero function in case of missing signal when
Fire Mode active, must be set in
Warning for Live Zero will have a higher priority than the
warning “Fire Mode”.
NOTE
If setting the command Start Reversing [11] on a digital input
terminal in
5-10 Terminal 18 Digital Input
, the FC will
understand this as a reversing command.
24-00 Fire Mode Function
Option:
Function:
[0]
*
Disabled
Fire Mode Function is not active.
[1]
Enabled - Run
Forward
In this mode the motor will continue to
operate in a clockwise direction. Works
only in Open Loop. Set
to Open Loop [0].
[2]
Enabled - Run
Reverse
In this mode the motor will continue to
operate in a counter-clockwise direction.
Works only in Open Loop. Set
to Open Loop [0].
[3]
Enabled - Coast Whilst this mode is enabled, the output is
disabled and the motor is allowed to coast
to stop.
[4]
Enabled - Run
Fwd/Rev
NOTE
In the above, alarms are produced or ignored in accordance
with the selection in
24-09 Fire Mode Alarm Handling
24-01 Fire Mode Configuration
Option:
Function:
[0]
*
Open
Loop
When Fire Mode is active, the motor will run with
a fixed speed based on a Reference set. Unit will
be the same as selected in
.
[3]
Closed
Loop
When Fire Mode is active, the build in PID
controller will control the speed based on the set
point and a feed back signal, selected in
. Unit to be selected in
. For other PID controller
settings use parameter group 20-** as for normal
operation. If the motor also is controlled by the
build in PID controller when in normal operation,
the same transmitter can be used for both cases
by selecting the same source.
NOTE
Before adjusting the PID controller set
, [2] Trip, All Alarms/Test.
NOTE
If Enable-Run Reverse is selected in
,
Closed Loop cannot be selected in
.
24-02 Fire Mode Unit
Option:
Function:
Select the
desired unit
when Fire
Mode is
active and
running in
Closed
Loop.
[0]
reference_feedback_unit_choices_None_textid
[1]
%
[2]
RPM
[3]
Hz
[4]
Nm
[5]
PPM
[10]
1/min
[11]
RPM
[12]
Pulse/s
[20]
l/s
[21]
l/min
[22]
l/h
[23]
m³/s
[24]
m³/min
[25]
m³/h
[30]
kg/s
[31]
kg/min
[32]
kg/h
[33]
t/min
Parameter Description
VLT
®
HVAC Drive Programming Guide
MG.11.CB.02 - VLT
®
is a registered Danfoss trademark
163
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