Fan Control Application Manual
11
AC30V series Variable Speed Drive
Fire Mode
Setup::Application::Fire Mode
Monitor::Application::Fire Mode*
Fire mode is intended for use in critical situations where it is imperative for the motor to be kept running if at all possible. In such a situation it may
be reasonable to override the Drives’ normal protective functions. An example of a critical situation may be a ventilation fan in a stairwell, where
continued operation in the event of a fire may assist the safe evacuation of personnel.
Caution
When Fire Mode is active the Drive and Motor protection trips are disabled. The use of Fire Mode itself increases the risk of causing
a fire by overloading the drive or motor, so it must only be used after assessing the risks.
PNO
Parameter Descriptions
Fire Mode Activate
Set TRUE to activate the Fire Mode feature. This input may only be set by connection to a digital input as part of the application.
1961
Fire Mode Setpoint
A reference value to be used when Fire Mode is active. Setting a negative setpoint will cause the drive to rotate in reverse direction.
1962
Fire Mode Level
This parameter selects the mode of operation when Fire Mode is activated. It is an enumerated value as follows:
0 DISABLED
Fire Mode feature is disabled. The
Activate
input going high will have no effect.
1 PARTIAL
Fire Mode is enabled with “partial mode” trips listed below ignored.
2 FULL
Fire Mode is enabled with “full mode” trips listed below ignored.
1963
FM Restart Delay
This specifies the duration to wait before attempting to reset a trip.
1964
Fire Mode Activated
When TRUE, this diagnostic, indicates that the Fire Mode is in operation. Trips are being ignored at either the PARTIAL or FULL level
and the fire mode
Setpoint,
which is non-zero, is being followed.
1965
Fire Mode Ready
This diagnostic, when TRUE, indicates that the Fire Mode will operate if the
Activate
input becomes
TRUE. The diagnostic will be
FALSE if the fire mode
Level
is set to DISABLED or the fire mode
Setpoint
is set to 0.0%.
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