ACE-tronics G9 ASD Installation and Operation Manual
49
control, respectively. If no items are detected as being in the Override mode, the settings of
F003
and
F004
will be used for Command and Frequency control, respectively.
Any or all of the Command and Frequency control input sources may be placed in the Override mode.
Placing the ASD in the Local mode (Local/Remote LED on) via the EOI places the RS485 2-Wire
control selection in the Override mode for Command and Frequency input (see the section titled
Override Operation on pg. 49
for the proper setting). The Local/Remote control Override feature for
Command and Frequency (or either) may be enabled/disabled at Program
Utilities
Prohibition
Local/Remote key (Command or Frequency) Override.
Communications may be used to place the remaining Command and eligible Frequency control input
sources in the Override mode. Once placed in the Override mode this setting is valid until it is cancelled,
the power supply is turned off, or the ASD is reset.
Override Operation
The signal sources of
Table 5
are scanned from left to right in the order that they are listed to determine
which input sources are in the Override mode (active Command or Frequency command present). The
first item detected as having the Override function turned on is the selection that is used for Command 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
register scan returns the condition that none of the listed items have the Override feature turned on or a
discrete input terminal is set to Serial/Local Switch and is activated.
Command and Frequency-Control Override Hierarchy
Table 5
lists the input conditions and the resulting output control source selections for Command and
Frequency control Override operation.
The ASD software reads the memory locations of the listed control sources 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 5. Command and Frequency Control Hierarchy.
1
2
3
4
5
6
Priority Level
Forced F003/
F004 by I/P
Terminal
(Assign to Serial/
Local Switch)
Comm.
Board
RS485
EOI
Keypad
Terminal Board
(Binary/BCD Input)
F003/F004
Command/
Frequency Mode
1
X
X
X
X
X
F003/F004 Setting
0
1
X
X
X
X
Communication Board
0
0
1
X
X
X
RS485
0
0
0
1
X
X
EOI Keypad
0
0
0
0
1
X
Terminal Board
0
0
0
0
0
F003/F004
Setting
F003/F004 Setting
Note: 1 = Override feature is turned on for that control input source; 0 = Override Off; X = Don’t Care.
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