Toshiba HX7+ ASD - Frequency Control (F004) Setup

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
F200) or if the Override feature is enabled (via communications or via the Local mode operation).
Table 12 on page 48 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
F004 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
LCD Port Connection (Program 
Communication  Communication Settings  LCD Port Connection) 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superseded by Communications activity.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 LCD Port Connection 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 F004 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
• F004 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.