Mitsubishi Electric FR-A720-0.4K Instruction Manual page 316

Selection of operation mode and operation location
(4) Operation at alarm occurrence
Operation
Alarm
Definition
Condition
(Pr. 551 setting)

Inverter fault
PU
2 (PU connector)
disconnection
of the PU
1 (RS-485 terminals)
connector
Communication
2 (PU connector)
alarm of PU
connector
1 (RS-485 terminals)
Communication 1 (RS-485 terminals)
alarm of RS-
485 terminals
2 (PU connector)
Communication
3 (USB connector)
alarm of USB
connector
Except for 3
Communication
alarm of

communication
option
*1 Can be selected using Pr. 75 Reset selection/disconnected PU detection/PU stop selection
*2 Can be selected using Pr. 122 PU communication check time interval, Pr. 336 RS-485 communication check time interval or Pr. 548 USB communication
check time interval.
*3 As controlled by the communication option.
*4 In the PU jog operation mode, operation is always stopped when the PU is disconnected. Whether error (E.PEU) occurrence is allowed or not is
as set in Pr. 75 Reset selection/disconnected PU detection/PU stop selection.
*5 When Pr. 550 NET mode operation command source selection = 1 (RS-485 terminals valid) or Pr. 550 NET mode operation command source selection =
9999 and the communication option is not fitted
*6 When Pr. 550 NET mode operation command source selection = 0 (communication option valid) or Pr. 550 NET mode operation command source selection
= 9999 and the communication option is fitted
306
Mode
PU External
Operation Operation
Stop/
continued
*2
Stop/
continued
*2
Stop/
continued
*2
External/PU External/PU
Combined Combined
Operation Operation Mode
Mode 1 2
(Pr. 79 = 3) (Pr. 79 = 4)
Stop
Stop/continued
Stop/continued
Stop/continued
Continued
*2
Continued
Stop/continued
Continued
*2
Continued
Stop/continued
Continued
*2
Continued
Continued
NET Operation
NET Operation
(when RS-485
communication
terminals are
option is used)
used)
*5
*1, 4
*1
Continued
Continued
Stop/continued
Continued
*2
Continued
Stop/continued
Continued
*3
(when
*6