NOTE
During Fire Mode operation all stop commands to the frequency converter will be ignored, including Coast/Coast inverse
and External Interlock. However, if your frequency converter incorporates “Safe-Stop”, this function is still active. See Section
“How to Order / Ordering Form Type Code”.
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
6-02 Fire Mode Live Zero Timeout
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
.
24-01 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
24-07 Fire Mode Feedback Source
. Unit to be
selected in
. For other PID
controller settings use parameter group 20-** as
for normal operation. If the motor also is
24-01 Fire Mode Configuration
Option:
Function:
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]
None
[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
Parameter Description
VLT
®
HVAC Drive Programming Guide
172
MG.11.CC.02 - VLT
®
is a registered Danfoss trademark
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