34 Q9 ASD Installation and Operation Manual
Override Operation
The status of the listed control sources of Table 3 are read to determine which input sources are in the
Override Mode. The outcome is used for Command and/or Frequency control input.
The Override control setting supersedes the setting of the Command mode setting (F003) and the
Frequency mode setting (F004). However, the F003 and F004 settings will be used in the event that the
scan returns the condition that none of the listed items have the Override feature turned on (See Table 3)
or a discrete input terminal is set to Local Priority and is activated.
Command and Frequency-Control Override Hierarchy
Table 3 lists the input conditions and the resulting output control source selections for Command and
Frequency control Override operation. The Q9 ASD reads the command registers of the listed control
items from the left to the right.
The first item to be read that has the Override feature turned on will be used for Command or Frequency
control.
Table 3. Command and Frequency Control Hierarchy.
Forced F003/
F004 by I/P
Terminal
(Assign to Local
Priority)
Communication
Card
RS485
(4-Wire)
RS485
(2-Wire)
Panel
F003/F004
(Setting)
Actual Command/
Frequency Mode
1 X X X X X F003/F004 Setting
0
1 X X X X Communication Card
00
1 X X X RS232/485
000
1 X X Common Serial
0000
1 X Panel
00000
1 F003/F004 Setting
Note: 1 = Override feature is active for that input; X = Don’t care; and 0 = Override Off
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