Technical information

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 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 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 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 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
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 0-02 Motor
Speed Unit.
[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 24-02 Fire Mode Unit. For other PID
controller settings use parameter group 20-** as
24-01 Fire Mode Configuration
Option: Function:
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 24-09 Fire Mode
Alarm Handling, [2] Trip, All Alarms/Test.
NOTE
If Enable-Run Reverse is selected in 24-00 Fire Mode
Function, Closed Loop cannot be selected in 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] 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
[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
[70] mbar
[71] bar
[72] Pa
[73] kPa
[74] m WG
[75] mm Hg
[80] kW
[120] GPM
[121] gal/s
Parameter Description
VLT
®
HVAC Drive Programming Guide
170 MG11CD02 - VLT
®
is a registered Danfoss trademark
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