Powered by Eaton Technology VSD Series Drives User Manual
LIT-1201828
For more information visit: www.johnsoncontrols.com 15-25
November 2009
Figure 15-21: Underload Time Counter Function
719 Underload Time
This time can be set between 2.0 and 600.0 sec.
This is the maximum time allowed for an underload state to exist. An internal up/
down counter counts the accumulated underload time. if the underload counter value
goes above this limit, the protection will cause a trip according to ID716. If the drive is
stopped, the underload counter is reset to zero. See Figure 15-21.
804 Fire Mode Function
Fire Mode is used to start motor and continue to operate due to emergency
conditions. Faults will be changed to warnings to prevent shutdown. The overload
should be selected to AUTO to prevent overload trip during “Fire Mode” operation.
This is only required if unit is an IntelliPass bypass which uses an electronic overload
with contactor to run motor. If set to AUTO on the overload, the overload fault will be
ignored and motor will continue to run.
!
IMPORTANT
The electronic overload on the contactor must be set to
AUTO, otherwise the overload will function normally.
Note: (1) Fire Mode has no effect on Bypass operation.
(2) Removing the “Fire Mode” digital input will return the drive to
normal operation.
This parameter determines whether the fire mode function is determined by a contact
closure or contact opening on digital input.
• Closing contact initiates fire mode function. Option 9 in digital input parameter.
• Opening contact initiates fire mode function. Option 14 in digital input parameter.
Fire Mode Speed Reference
Parameter P1.7.20 sets the drive’s fire mode speed.
Underload
Time Counter
ID719
Trip Area
Underload
Time
No Underload
Trip/Warning
ID716
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