Danfoss VLT Series Programming Manual page 175

Parameter Description
24-07 Fire Mode Feedback Source
Option:
3 3
[0] No function
*
[1] Analog input 53
[2] Analog input 54
[3] Pulse input 29
[4] Pulse input 33
[7] Analog input X30/11
[8] Analog input X30/12
[9] Analog Input X42/1
[10] Analog Input X42/3
[11] Analog Input X42/5
[15] Analog Input X48/2
[100] Bus feedback 1
[101] Bus feedback 2
[102] Bus feedback 3
24-09 Fire Mode Alarm Handling
Option:
[0] Trip+Reset,
Critical
Alarms
[1] Trip, Critical
*
Alarms
[2] Trip, All
Alarms/Test
NOTE
Warranty-affecting alarms. Certain alarms can affect the
lifetime of the frequency converter. Should one of these
ignored alarms occur whilst in Fire Mode, a log of the
event is stored in the Fire Mode Log.
Here the 10 latest events of warranty-affecting alarms, fire
mode activation and fire mode deactivation are stored.
NOTE
The setting in 14-20 Reset Mode is disregarded in case of
Fire Mode being active (see parameter group 24-0*, Fire
Mode).
174
®
VLT HVAC Drive Programming Guide
Function:
Select the feed back input to be
used for the Fire Mode feed back
signal when Fire Mode is active.
If the motor also is controlled by the
built in PID controller when in
normal operation, the same
transmitter can be used for both
cases by selecting the same source.
Function:
If this mode is selected, the frequency
converter will continue to run, ignoring
most alarms, even if doing so it may result
in damage of the frequency converter.
Critical alarms are alarms, which cannot be
suppressed but a restart attempt is possible
(Infinity Automatic Reset).
In case of a critical alarm, the frequency
converter will trip and not auto-restart
(Manual Reset).
It is possible to test the operation of Fire
Mode, but all alarm states are activated
normally (Manual Reset).
MG.11.CC.02 - VLT
No: Description
4 Mains ph. Loss
7 DC over volt
8 DC under volt
9 Inverter overloaded
13 Over current
14 Earth fault
16 Short circuit
29 Power card temp
33 Inrush fault
38 Internal fault
65 Ctrl. card temp
68 SafeStop
3.22.2 24-1* Drive Bypass
The frequency converter includes a feature, which can be
used to automatically activate an external electro-
mechanical bypass in case of a trip/trip lock of the
frequency converter or the event of a Fire Mode Coast (see
24-00 Fire Mode Function).
The bypass will switch the motor to operation direct on
line. The external bypass is activated by means of one of
the digital outputs or relays in the frequency converter,
when programmed in parameter group 5-3* or parameter
group 5-4*.
NOTE
Important! After enabling the Drive Bypass Function, the
frequency converter is no longer Safety Certified (for using
the Safe Stop in versions, where included).
To deactivate the Drive Bypass at normal operation (Fire
Mode not activated), one of following actions must be
carried out:
•
Press the Off button on the LCP, (or program two
of the digital inputs for Hand On-Off-Auto).
•
Activate External Interlock via digital input
•
Carry out a Power Cycling.
NOTE
The Drive Bypass cannot be deactivated if in Fire Mode. It
can be deactivated only by either removing the Fire Mode
command signal or the power supply to the frequency
converter!
When the Drive Bypass function is activated, the display on
the LCP will show the status message Drive Bypass. This
message has a higher priority than the Fire Mode status
messages. When the automatic Drive Bypass function is
®
is a registered Danfoss trademark
Warranty
Critical
Affecting
Alarms
Alarms
x
x
x
x
x
x
x
x
x
x
x
x