Mitsubishi Electric 800 Series Instruction Manual page 479

 Two-wire type connection
• If the computer is 2-wire type, a connection from the inverter can be changed to 2-wire type by passing wires across
reception terminals and transmission terminals of the RS-485 terminals.
NOTE
• A program should be created so that transmission is disabled (receiving state) when the computer is not sending and
reception is disabled (sending state) during sending to prevent the computer from receiving its own data.
5.12.3 Initial setting of operation via communication
Set the action when the inverter is performing operation via communication.
• Set the communication protocol. (Mitsubishi inverter protocol/MODBUS RTU protocol)
• Set the action at fault occurrence or at writing of parameters
Pr.
549 Protocol selection
N000
342 Communication EEPROM
N001 write selection
*1 Communication reset
349
selection/Ready bit status
selection/Reset selection
after inverter faults are
cleared/DriveControl writing
restriction selection
Communication reset
*1
N010
selection
*1 Ready bit status selection
N240
502 Stop mode selection at
N013 communication error
779 Operation frequency during
N014 communication error
*1 The setting is available only when a communication option is installed.
478
5. PARAMETERS
5.12 (N) Operation via communication and its settings
Computer
Transmission
enable
Reception
enable
Name Initial value
0
0
0
0
0
0
9999
Inverter
TXD+
TXD-
RXD+
RXD-
Pass a wire
SG
SG
Setting range
0 Mitsubishi inverter protocol (computer link)
1 MODBUS RTU protocol
2 BACnet MS/TP protocol
0 Parameter values written by communication are written to the
EEPROM and RAM.
1 Parameter values written by communication are written to the
RAM.
0 Enables the error reset function in any operation mode.
1 Enables the error reset function only in the Network operation
mode.
100, 101 For details, refer to
1000, 1001, For details, refer to
1100, 1101,
10000, 10001,
10100, 10101,
11000, 11001,
11100, 11101
0 Enables the error reset function in any operation mode.
1 Enables the error reset function only in the Network operation
mode.
0 The status of Ready bit in communication data can be
changed.
1
0 to 4 Select the operation at a communication error occurrence.
0 to 590 Hz Set the frequency to be run at a communication error
occurrence.
9999 The motor runs at the frequency used before the
communication error.
Description
page 641 and page 643.
page 641.