Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual page 384

Condition
Command
(Pr.551
interface
setting)
Inverter reset
External
Operation command
control
—
(start, stop)
circuit
terminal
Frequency setting
○: Valid, ×: Invalid, ∆: Partially valid
*1 RS-485 communication via PU connector
*2 Follows the Pr.338 Communication operation command source and Pr.339 Communication speed command source settings. (Refer to
page 380.)
*3 At occurrence of RS-485 communication error, the inverter cannot be reset from the computer.
*4 Only PU stop is enabled. "PS" is displayed on the operation panel during PU stop. Follows the Pr.75 Reset selection/Disconnected PU
detection/PUStop selection setting. (Refer to
*5 Writing of some parameters may be disabled by the Pr.77 Parameter write selection setting and the operating condition. (Refer to
*6 Some parameters are write-enabled independently of the operation mode and command source presence/absence. Writing is also enabled when
Pr.77 = "2".
(Refer to page 328.) Parameter clear is disabled.
*7 When Pr.550 NET mode operation command source selection = "1" (RS-485 terminals enabled), or Pr.550 NET mode operation command
source selection = "9999" with no communication option connected.
*8 When Pr.550 NET mode operation command source selection = "0" (communication option enabled), or Pr.550 NET mode operation
command source selection = "9999" with communication option connected.
 Operation when a communication error occurs
Condition
Fault type
(Pr.551 setting)
Inverter fault —
2 (PU connector)
9999 (automatic
PU connector
recognition)
disconnection
Other than 2
2 (PU connector)
Communication error
at PU connector
Other than 2
1 (RS-485 terminals)
Communication error
at RS-485 terminals
Other than 1
3 (USB connector)
9999 (automatic
Communication error
recognition)
at USB connector
Other than 3
Communication error
at communication —
option
*1 Selectable with Pr.75 Reset selection/disconnected PU detection/PU stop selection.
*2 Selectable with Pr.122 PU communication check time interval, Pr.336 RS-485 communication check time interval, and Pr.548 USB
communication check time interval.
*3 The operation depends on the communication option setting.
*4 In the PU JOG operation mode, operation always stops when the PU is disconnected. The operation of PU disconnection (E.PUE) follows the
Pr.75 Reset selection/Disconnected PU detection/PUStop selection setting.
*5 When Pr.550 NET mode operation command source selection = "1" (RS-485 terminals enabled), or Pr.550 NET mode operation command
source selection = "9999" with no communication option connected.
*6 When Pr.550 NET mode operation command source selection = "0" (communication option enabled), or Pr.550 NET mode operation
command source selection = "9999" with communication option connected.
Item
PU External
operation operation
○ ○
× ○
× ○
page 320.)
Operation in each operation mode at error occurrences
External
PU operation
operation
Stop
*1*4
Stop/continued
*1
Stop/continued
Stop/
Continued
*2
continued
Continued
Stop/
Continued
*2
continued
Continued
Stop/
Continued
*2
continued
Continued
Continued
Controllability in each operation mode
Combined Combined
operation operation
mode 1 mode 2
(Pr.79 = "3") (Pr.79 = "4")
○ ○ ○
○ ×
×
× ○
×
Combined Combined
operation operation
mode 1 mode 2
(Pr.79 = 3) (Pr.79 = "4")
Stop/
*2
continued
Stop/
*2
continued
5.9 (D) Operation command and frequency command
NET operation
NET operation
(via RS-485
*8
(via option)
*7
terminals)
*2
*2
page 328.)
NET operation NET
(via RS-485 operation
*5 *6
terminals) (via option)
Continued
Continued
Stop/
Continued
*2
continued
Stop/
*3
continued
5. PARAMETERS
1
2
3
4
5
6
7
8
9
10
383