Toshiba DN-68249-003 Installation & Operation Manual Download Page 45

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CMOD/FMOD Control

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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 Q9 Plus ASD. The source of the frequency
(speed) control signal must be established for
normal operation.

The command and speed reference may come from

either internal or external sources

. Once the signal

source 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. In the event that
multiple control commands are received, only the
user-configured signal source is recognized. The
primary control method for command and
frequency control are selected at

F003

and

F004

respectively.

Figure 28. on pg. 34

depicts the

command and frequency control sources and the
system throughput applicables.

Command Control

The Command Mode selection of

F003

establishes

the primary command source of the ASD when
operating in the Remote mode. While operating in
the Local mode the EOI is the command source.

Placing the EOI in the Local mode selects the EOI
Keypad as the Command Mode source. Local
mode operation may be superseded by other
settings.

Example:

With the EOI set to Local, an activated

discrete input terminal set to Serial/Local Switch
places the system in the Remote mode and the
settings of

F003

and

F004

become the source of

control.

Once the discrete input terminal is no longer
activated the system will return to the command of
the EOI and run at the commanded EOI value.

The source of the Command

control signal may be

selected by:

• The

F003

setting,

• Via communications, or

• Placing the EOI in the Local mode.

Possible Command signal source selections
include the following (

F003

• Terminal Board (default setting),

• EOI Keypad,

• RS485/BACnet, or

• Communication Option Board.

Note:

See

Table 9 on page 252

for the

available discrete input terminal
functions that may be used to change
the active control source (i.e., Serial/
Local Switch, V/I Terminal Priority,
etc.).

Frequency Control

The

Frequency Mode 1 (or Frequency Mode 2)

setting establishes the primary source of the
frequency-control input for the Q9 Plus ASD.
Frequency Mode 1 is used for speed control unless
the Reference Priority Selection parameter is
configured to switch this setting under user-defined
conditions (see

F200

Figure 28. on pg. 34

shows the relationship

between the frequency-control sources. As
indicated in the figure, other items may supersede
the selection at

F004

Placing the EOI in the Local mode selects EOI
Keypad as the frequency source. Operating in Local
mode may be superseded by other settings.

Example:

With the EOI as the frequency-control

source because the Local/Remote setting is set to
Local, activating a discrete input terminal that is set
to

V/I Terminal Priority enables the V/I terminal as

the frequency-control source for the duration of the

activation.