(D) Operation command and frequency command
PARAMETERS
323
5
GROUP
D
NOTE
• The command source of communication follows the Pr.550 and Pr.551 settings.
• The Pr.338 and Pr.339 settings can be changed while the inverter is running when Pr.77 = "2". Note that the setting change
is applied after the inverter has stopped. Until the inverter has stopped, communication operation command source and
communication speed command source before the setting change are valid.
Command source switchover via external terminals (X67)
• In the Network operation mode, the start command source and speed command source can be switched over by the
command source switchover signal (X67). This can be used to control signal inputs from both the external terminals and via
communication.
• For the X67 signal, set "67" to any of Pr.178 to Pr.189 (input terminal function selection) to assign the function to a
control terminal.
• When the X67 signal is OFF, the start command source and speed command source are given via control terminals.
NOTE
• The ON/OFF state of the X67 signal is applied only during a stop. When the terminals are switched during operation, the ON/
OFF state is applied after a stop.
• When the X67 is OFF, a reset via communication is disabled.
• Changing the terminal assignment using Pr.178 to Pr.189 (input terminal function selection) may affect the other
functions. Set parameters after confirming the function of each terminal.
Pr.28 Multi-speed input compensation selection page 328
Pr.59 Remote function selection page 295
Pr.79 Operation mode selection page 306
5.9.4 Reverse rotation prevention selection
• Set this parameter to limit the motor rotation to only one direction.
• This parameter is valid for all of the reverse rotation and forward rotation keys of the operation panel and of the parameter
unit, the start signals (STF, STR signals) via external terminals, and the forward and reverse rotation commands through
communication.
X67 signal state Start command source Speed command source
Signal not assigned
According to Pr.338 According to Pr.339
ON
OFF Commands from external terminals are only valid.
This function can prevent reverse rotation fault resulting from the incorrect input of the start signal.
Pr. Name Initial value Setting range Description
78
D020
Reverse rotation prevention
selection
0
0
Both forward and reverse rotations
allowed
1 Reverse rotation disabled
2 Forward rotation disabled
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