Fire Mode
13-3
AC30V series Variable Speed Drive
Functional Description
When Fire Mode is enabled the normal speed reference and start / stop control of the drive are modified.
SEQUENCING
Sequencing is the term given to controlling when the drive runs. When Fire Mode is enabled the normal sequencing control signals are over-
ridden. The parameters that control this are
Activate
Setpoint
Level
PNO 0610
Sequencing::App Control Word bit 0, Switch On, (refer to Appendix B:Sequencing Logic). In typical applications bit 0 of the App
Control Word is driven from a digital input, used as a Coast Stop signal.
If
Level
is set to DISABLED or
Setpoint
is zero then setting
Activate
to TRUE will have no effect.
If
Level
is set to either PARTIAL or FULL and
Setpoint
is not zero then setting
Activate
to TRUE will activate Fire Mode. When Fire Mode is
active the drive will run, (turn the motor).
The only reasons that the drive will not run are:
Level
is changed back to DISABLED
Activate
is changed back to FALSE
Setpoint
is change to zero
The Coast Stop input is activated.
The STO circuit is activated.
An enabled trip source becomes active.
A hardware fault
REFERENCE
The Fire Mode
Setpoint
parameter is selected automatically whenever Fire Mode is
Activated
. The Setpoint is passed through the System
Ramp, (see Appendix D).
Caution
Fire Mode does not override the standard Ramp features. Specifically
0497 Ramp Hold
can prevent the setpoint changing to the Fire
Mode
Setpoint
value.
