Mitsubishi Electric FR-D720 K Series Instruction Manual page 182

Selection of operation mode and operation location
(2) Controllability through communication
Controllability through communication in each operation mode is shown below.
Monitoring and parameter read can be performed from any operation regardless of operation mode.
Operation Condition
Location (Pr. 551 Setting)
2
(PU connector)
Control by
RS-485
communication
from PU
connector
Other than the
above
Control circuit
external —
terminals

As set in Pr.338 Communication operation command source and Pr. 339 Communication speed command source (Refer to page 177.)

At occurrence of RS-485 communication error, the inverter cannot be reset from the computer.

Enabled only when stopped by the PU. At a PU stop, PS is displayed on the operation panel. As set in Pr. 75 PU stop selection. (Refer to page 161.)

Some parameters may be write-disabled according to the Pr. 77 Parameter write selection setting and operating status. (Refer to page 164.)

Some parameters are write-enabled independently of the operation mode and command source presence/absence. When Pr. 77 = "2", write is enabled.
(Refer to the parameter list on page 60) Parameter clear is disabled.

Available with multi-speed setting and terminal 4-5 (valid when AU signal is ON).
(3) Operation at error occurrence
Operation
Error Definition
Condition
(Pr. 551 setting)
Inverter
—
fault
2 (PU connector)
PU 9999 (automatic
disconnection of recognition)
the PU Other than the
above
RS-485
2 (PU connector)
communication
error of the PU Other than the
connector above

Can be selected using Pr. 75 Reset selection/disconnected PU detection/PU stop selection.

Can be selected using Pr. 122 PU communication check time interval.

In the PU JOG operation mode, operation is always stopped when the PU is disconnected. Whether fault (E.PUE) occurrence is allowed or not is as set in
Pr. 75 Reset selection/disconnected PU detection/PU stop selection.
178
Operation
Mode
PU
Operation
Item

Run command (start)
Run command (stop) 
Running frequency

setting

Parameter write 
Inverter reset 
Run command (start)
Run command (stop)
Running frequency
setting

Parameter write
Inverter reset

Inverter reset
Run command
(start, stop)
Frequency setting
Mode
External
PU Operation
Operation
Stop
Stop/continued 
Stop/continued
Stop/
Continued
continued
Continued
External/PU
External
Combined
Operation Mode 1
Operation
(Pr. 79 = 3)
 
 


  

 
  
  
  
 
  
 

 
 

: Enabled, : Disabled, : Some are enabled

External/PU External/PU
Combined
Operation Mode Operation Mode
1
(Pr. 79 = 3)
Stop/continued —
External/PU
Combined
Operation Mode 2
(Pr. 79 = 4)



 










Combined
NET Operation
2
(Pr. 79 = 4)
Stop/continued
NET Operation













 


