4.17 Main Menu - Application Functions 2 -
Group 24
4.17.1 24-0* Fire Mode
WARNING
EQUIPMENT DAMAGE AND PERSONAL INJURY
Non-interruption of the frequency converter due to fire
mode operation could cause overpressure and damage
the system and its components, hereunder dampers, and
air ducts. The frequency converter itself could be
damaged and it may cause damage or fire.
•
Ensure that the system is properly designed and
components used are carefully selected.
•
Ensure that the ventilation systems working in
life safety applications are approved by the
local fire authorities.
Background
Fire mode is for use in critical situations, where it is
imperative for the motor to keep running, regardless of the
frequency converter’s normal protective functions. These
could be ventilation fans in tunnels or stairwells for
instance, where continued operation of the fan facilitates
safe evacuation of personnel if there is a fire. Some
selections of fire mode function cause alarms and trip
conditions to be ignored, enabling the motor to run
without interruption.
Activation
Fire mode is activated only via digital input terminals. See
parameter group
5-1* Digital Inputs
.
Messages in display
When fire mode is activated, the display shows the status
message
Fire Mode
.
Once the fire mode is deactivated, the status message
disappears.
If an alarm with warranty implications (see
parameter 24-09 FM Alarm Handling
) occurs while the
frequency converter is active in fire mode, the display
shows the status message
Fire Mode Limits Exceeded
. Once
this status message appears, it remains permanently and
cannot be removed.
Digital and relay outputs can be configured for the status
messages
Fire Mode Active
. See parameter group
5-3*
Digital Outputs
and parameter group
5-4* Relays
.
Access the status messages
Fire Mode
and
Fire Mode Limits
Exceeded
via the extended status word.
Message
Type
LCP Message
Warning
Word 2
Extended
status
Word 2
Fire Mode
Status
+
+
+ (bit 25)
Fire Mode
Limits
Exceeded
Status
+
+
+ (bit 27)
Table 4.15 Fire Mode Display Messages
Log
The fire mode log shows an overview of events related to
fire mode in the fire mode log, see also parameter group
18-1* Fire Mode Log
.
The log includes up to 10 of the latest events.
Fire Mode
Limits Exceeded
has a higher priority than
Fire Mode Active
.
The log cannot be reset.
The following events are logged:
•
Fire mode activated.
•
Fire mode limits exceeded (warranty affecting
alarms).
All other alarms occurring while fire mode is active are
logged as usual.
NOTICE
During fire mode operation, all stop commands to the
frequency converter are ignored, including coast, coast
inverse, and external interlock.
NOTICE
If setting the command
[11] Start Reversing
on a digital
input terminal in
parameter 5-10 Terminal 18 Digital
, the frequency converter understands this
command as a reversing command.
24-00 FM Function
Option:
Function:
NOTICE
In fire mode, alarms are produced or
ignored in accordance with the selection
in
parameter 24-09 FM Alarm Handling
.
[0]
*
Disabled
Fire mode function is not active.
[1]
Enabled-
Run
Forward
In this mode, the motor continues to operate in
a clockwise direction.
[2]
Enabled-
Run
Reverse
In this mode, the motor continues to operate in
a counterclockwise direction.
[3]
Enabled-
Coast
While this mode is selected, the output is
disabled, and the motor is allowed to coast to
stop. When
parameter 24-01 Fire Mode Configu-
ration
is set to
[3] Closed Loop
, this mode
cannot be selected.
Parameters
Programming Guide
MG03N202
Danfoss A/S © 11/2015 All rights reserved.
113
4
4
Summary of Contents for VLT DriveMotor FCP 106
Page 2: ......
