Mitsubishi Electric 800 Series Instruction Manual page 222

[Explanation of terms in table]
External (EXT): Commands from external terminal are only valid.
NET: Commands via communication are only valid.
Combined: Command from both external terminal and communication is valid.
―: Command from either of external terminal and communication is invalid.
Compensation: Commands are valid only from external terminal signals when Pr.28 Multi-speed input compensation
selection = "1".
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.
X67 signal state Start command source
Signal not assigned According to Pr.338
ON
OFF Commands from external terminals are only valid.
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.
Parameters referred to
Pr.28 Multi-speed input compensation selection
Pr.59 Remote function selection
Pr.79 Operation mode selection
5.6.4 Reverse rotation prevention selection
This function can prevent reverse rotation fault resulting from the incorrect input of the start signal.
Pr. Name
78 Reverse rotation prevention
D020 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.
Speed command source
According to Pr.339
page 226
page 197
page 204
Initial value
0
Setting range
0 Both forward and reverse rotations
allowed
1 Reverse rotation disabled
2 Forward rotation disabled
5.6 (D) Operation command and frequency command
Description
221
5. PARAMETERS
3
4
5
5
5
6
7
8
9
10