32 G7 ASD Operation Manual
• Use Communication Card, or
•F003 setting (is used if no signal sources are in the Override mode).
Note: The Control Terminal Strip is placed in the Override mode by assigning a discrete
terminal to Command Control Terminal Strip Priority and connecting the terminal
to CC. Once activated (Run command required), the Control Terminal Strip 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 Se le ct i o n parameter is
configured to automatically switch this setting (see
F200) or if the Override feature is enabled (via
communications or via the Local mode operation).
Table 5 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 Local mode selects either the RS232/RS485 or the Common Serial (TTL) as
the Frequency Mode #1 control source. Once in the Local mode, the LCD Port Connection setting
determines if the RS232/RS485 or the Common Serial (TTL) will be used for Frequency Mode #1
control. Local mode operation may be superseded by other Communications Override settings.
Example: With the EOI set to Local and the LCD Port Connection set to Common Serial (TTL) ,
setting the Communication Card or RS232/RS485 control to Override will supersede the Common
Serial (TTL) setting.
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 fro m the list below in the Override mode via communications, or
• Placing the EOI in the Local mode (places only the RS232/RS485 or Common Serial in the
Override mode).
Possible Frequency control source selections include the following:
• Communication Card,
• RS232/RS485,
• Common Serial (TTL),
•LED Keypad,
• Control Terminal Strip (default setting), or
•F004 setting (used if no other items are in the Override mode).
Note: The Control Terminal Strip is placed in the Override mode by assigning a discrete
terminal to VI/II Terminal Priority and connecting the terminal to CC. Once the
discrete terminal is activated, VI/II is used as the Control Terminal Strip Override
control item.