Operating instructions
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 par. 6-02 Fire
Mode Live Zero Timeout Function.
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 par. 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 par. 24-01 Fire Mode
Configuration 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 par. 24-01 Fire
Mode Configuration 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 accord-
ance with the selection in par. 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 par. 0-02 Motor Speed
Unit.
[3] Closed
Loop
When Fire Mode is active, the build in PID control-
ler will control the speed based on the set point
and a feed back signal, selected in par. 24-07 Fire
Mode Feedback Source. Unit to be selected in
par. 24-02 Fire Mode Unit. 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 par. 24-09 Fire
Mode Alarm Handling, [2] Trip, All Alarms/Test.
NOTE
If Enable-Run Reverse is selected in par. 24-00 Fire Mode
Function, Closed Loop cannot be selected in
par. 24-01 Fire Mode Configuration.
24-02 Fire Mode Unit
Option: Function:
Select the desired unit when Fire Mode is active
and running in Closed Loop.
[0]
[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] m/s
[24] m/min
[25] m/h
[30] kg/s
[31] kg/min
[32] kg/h
[33] t/min
[34] t/h
[40] m/s
[41] m/min
[45] m
[60] °C
Parameter Description
VLT
®
HVAC Drive Programming Guide
162 MG.11.CA.02 - VLT
®
is a registered Danfoss trademark
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