Reverse Rotation Prevention Selection; Frequency Setting Using Pulse Train Input - Mitsubishi Electric FR-A800 Series Instruction Manual

[Explanation of Terms in Table]
EXT: External terminal only
NET: Communication interface only
Combined: Either external terminal or communication interface
—: Neither external terminal nor communication interface
Compensation: Only commands given via the external terminal are valid when Pr.28 Multi-speed input compensation selection = "1".
NOTE
• The communication interface selection is determined by the setting of Pr.550 and Pr.551.
• The setting of Pr.338 and Pr.339 can be changed during operation when Pr.77 = "2". Note that the changed setting is applied
after the inverter has stopped. Until the inverter has stopped, the previous setting of the interface for the operation command
and the speed command in the Network operation mode is valid.
 Changing the command interface using a signal input via external
terminal (X67 signal)
• In the Network operation mode, the command interface for the operation command and the speed command can be
changed using the Command source switchover (X67) signal. This method may be useful to use both external terminal
and communication interface by using a different interface according to the command type.
• 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 command interface for the operation command and the speed command is the control
terminal.
X67 signal state
Signal not assigned
ON
OFF
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 reflected 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
Pr.59 Remote function
Pr.79 Operation mode
5.9.4

Reverse rotation prevention selection

This function can prevent reverse rotation fault resulting from the incorrect input of the start signal.
Pr.
78 Reverse rotation
D020 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.
5.9.5

Frequency setting using pulse train input

A pulse train input via terminal JOG can be used to set the inverter's speed command.
406
5. PARAMETERS
5.9 (D) Operation command and frequency command
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Interface for the operation
Determined by Pr.338 setting
Control terminal only
selectionpage 411
selectionpage 367
selectionpage 389
Name Initial value
0
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Interface for the speed command
command
Determined by Pr.339 setting
Setting range
0 Both forward and reverse rotations allowed
1 Reverse rotation disabled
2 Forward rotation disabled
Description