38
P9 ASD Installation and Operation Manual
Command Mode and Frequency Mode
Control
Command
control includes instructions such as
Stop
,
Run
,
Jog
, etc. The source of the
Command
signal must be established for normal operation.
Frequency
commands control the output speed of the P9 ASD. The source of the frequency control
signal must be established for normal operation.
The source of the command control and frequency control may be either internal or external. Once the
source signal is selected for either function, the system may be configured to use the selected signal all
of the time or switch under user-defined conditions.
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, the signal
sources are assigned priority levels. The primary control method for
Command
and
Frequency
control
uses the settings of
, respectively.
Command Control (
The
Command Mode
establishes the
primary source of the command input for the ASD.
However, the
Override
feature may supersede the
setting as indicated in
shows the hierarchy of the control sources
managed by the
Override
function. The level of the
control item of the hierarchy is listed from left to right,
most to least, respectively. As indicated in the table, the
Override
setting may supersede the
setting.
Placing the EOI in the
Hand
mode selects the
RS485
(2-wire) as the
Command Mode
control source.
Hand
mode operation may be superseded by other
Override
settings.
Example:
With the EOI set to
Hand
,
Communication Board
input or
RS485
(4-wire) input will
supersede EOI control input.
The remaining control sources may be placed into the
Override Mode
using communications.
The source of the
Command
control signal may be selected by:
setting,
• Placing an item from the
Command
signal source selections in the
Override Mode
via
communications, or
• Placing the EOI in the
Hand
mode (places only the RS485 [2-wire] or the RS485 [4-wire] in the
Override Mode).
Possible
Command
signal source selections include the following:
• Terminal Block (default),
• EOI Keypad,
• RS485,
• Communication Option Board, or
•
setting (used if no signal sources are in the Override Mode).
Note:
The
Terminal Board
is placed in the
Override Mode
for
Command
functions by
activating a discrete terminal that is assigned to
Command Terminal Board Priority
.
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