42
WX9 ASD Installation and Operation Manual
Control Method Priority
Command
and
Frequency
control may be carried out using any one of several control methods (signal
sources) or combinations thereof. In the event that multiple control commands are received
simultaneously, the signal sources are assigned priority levels. Typically, the control method for
Command
and
Frequency
control uses the settings of
, respectively.
Figure 29. Default Control Method Priority Levels.
Override Operation
Any or all of the
Command
and
Frequency
control sources may be placed in the
Override Mode
to
alter the default priority assignments.
lists the input conditions and the resulting output control
source selections for
Command
and
Frequency
control
Override
operation. The
WX9 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.
Once placed in the
Override Mode
, the setting is valid until it is cancelled, the power supply is turned
off, or the ASD is reset.
Table 7. Command and Frequency Control Hierarchy.
The Override control setting supersedes the setting of the
Command
mode setting (
Frequency
mode setting (
). However, the
settings will be used in the event that the
scan returns the condition that none of the listed items have the
Override
feature enabled.
Note:
The
Terminal Board
is placed in the
Override
mode for
Command
functions by
assigning a discrete terminal to
Terminal Command Priority
and connecting the
terminal to
CC
. Upon activation (Run command required), the
Terminal Board
settings will be used for
Override Command
control (F, R, Preset Speeds, etc.).
Note:
The
Terminal Board
is placed in the
Override
mode for
Speed
control functions by
assigning a discrete input terminal to
VI/II Terminal Frequency Priority
and
connecting the terminal to
CC
. Upon activation,
VI/II
is used as the
Terminal Board
Override
control item.
Command/
Frequency Mode
Communication
Card
RS232/
RS485
TTL
Terminal Board
(Binary/BCD Input)
F003/F004
Setting
Communication Card
1
X
X
X
X
RS232/RS485
0
1
X
X
X
TTL
0
0
1
X
X
Terminal Board
0
0
0
1
X
F003/F004 Setting
0
0
0
0
Setting
0 = Override inactive
1 = Override active
X = Don’t care
COMMAND/
FREQUENCY
MODE
Priority 1
Priority 2
Priority 3
Priority 4
Priority 5
Communication
Card
RS232/RS485
TTL
Terminal Board
(Binary/BCD
Input)
F003/F004
Setting
Highest Priority
Lowest Priority
Summary of Contents for WX9 ASD
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