HX7+ ASD Installation and Operation Manual
47
Note:
The
Terminal Board
is placed in the
Override
mode by assigning a discrete input
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.).
Frequency Control (F004)
The
Frequency Mode 1
(or the Frequency Mode 2)
setting establishes the user-selected source of the
frequency-control input for the ASD. The signal source selected here is used for speed control unless
the
Reference Priority Selection
parameter is configured to automatically switch this setting (see
) or if the
Override
feature is enabled (via communications or via the Local mode operation).
shows the hierarchy of the control sources managed by the
Override
function. The
level of the control item on the hierarchy is listed from left to right, most to least, respectively. As
indicated in the table, the
setting may be overridden by any of the other input sources.
Placing the keypad in the
Local
mode selects either the
RS232/RS485
or the
TTL
as the
Frequency
Mode 1
control source. Once in the
Local
mode, the
(Program
Communication
Communication Settings
) setting determines if the
RS232/
RS485
or the
TTL
will be used for
Frequency Mode 1
control.
Local
mode operation may be
superseded by
Communications
activity.
Example:
With the keypad set to
Local
and the
set to
TTL
, an input signal
received from the
Communication Card
or
RS232/RS485
will supersede any received
TTL
command.
The remaining control sources may be placed into the override mode using communications.
The source of the
Frequency
control signal may be selected by:
•
The
setting,
•
Placing an item from the list below in the
Override
mode via communications, or
•
Placing the keypad in the
Local
mode (places only the RS232/RS485 or TTL in the Override
mode).
Possible
Frequency
control source selections include the following:
•
Communication Card,
•
RS232/RS485,
•
TTL,
•
CN8 Option,
•
Terminal Board (default setting), or
•
setting (used if no other items are in the Override mode).
Note:
The
Terminal Board
is placed in the
Override
mode 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.
Summary of Contents for HX7+ ASD
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