Q9 Plus ASD Installation and Operation Manual
37
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
Q9 Plus ASD
. The signal source selected here is used for speed control
unless the
Reference Priority Selection
parameter is configured to switch this setting automatically
(see
F200
) or if the
Override
feature is enabled.
Table 3 on pg. 38
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
Override
setting may supersede the selection at
F004
.
Placing the EOI in the
Hand
mode selects the
RS485
(2-Wire) as the
Frequency Mode 1
control
source.
Hand
mode operation may be superseded by other
Override
settings.
Example:
With the EOI set to
Hand
,
Communication Card
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
Frequency
control signal may be selected by:
• The
F004
setting,
• Placing an item from the list below in the
Override Mode
via communications, or
• Placing the EOI in the
Hand
mode (places only the
RS485
[2-wire] in the Override Mode).
Possible
Frequency
control source selections include the following:
• Communication Card,
• RS485 (2-Wire),
• RS485 (4-Wire),
• Panel Keypad Option,
• Terminal Block (default setting), or
•
F004
setting (used if no other items are in the override mode).
Note:
The
Terminal Board
is placed in the
Override Mode
for
Speed
control functions by
assigning a discrete terminal to
V/I Terminal Priority
and connecting the terminal to
CC
. Once the discrete terminal is activated,
V/I
is used as the
Terminal Board
Override
control item.
Command and Frequency Control Selections
Any or all of the
Command
and
Frequency
control sources may be placed in the
Override Mode
.
Placing the
Q9 Plus ASD
in the
Hand
mode (Hand/Auto LED on) places the
RS485
(2-Wire) control
selection in the
Override Mode
for
Command
and
Frequency
input.
Communications
may be used to place the remaining
Command
and eligible
Frequency
control 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 Q9 Plus ASD is reset.
Command
and
Frequency
control changes may be disabled at parameter
F736
.
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.
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