Communication Specifications - Mitsubishi Electric 800 Series Instruction Manual

NOTE
• The monitored items and parameter settings can be read during communication with the Pr.336 RS-485
communication check time interval = "0 (initial value)" setting, but such operation will become faulty once the
operation mode is changed to the NET operation mode. When the NET operation mode is selected as the start-up
operation mode, communication is performed once, then a Communication fault (inverter) (E.SER) occurs.
To perform operation or parameter writing via communication, set "9999" or a large setting value in Pr.336. (The
setting value is determined by the computer program.) (Refer to
• Always reset the inverter after making the initial settings of the parameters. After changing the communication-related
parameters, communication cannot be made until the inverter is reset.
4.4.1

Communication specifications

Item
Communication protocol
Conforming standard
Connectable units
Communication Speed
Control procedure
Communication method
Character system
Start bit
Stop bit length
Communication
specifications
Parity check
Error check
Terminator
Waiting time setting
34
PARAMETER
Mitsubishi protocol (computer link)
EIA-485 (RS-485)
1:N (maximum 32 units), setting is 0 to 31 stations
Selected among 300/600/1200/2400/4800/9600/19200/38400/57600/76800/115200
bps
Asynchronous system
Half-duplex system
ASCII (7 bits or 8 bits can be selected.)
1 bit
1 bit or 2 bits can be selected.
Check (at even or odd numbers) or no check can be selected.
Sum code check
CR/LF (presence/absence selectable)
Selectable between presence and absence
page 45.)
Description
Related
Parameter
Pr.551
—
Pr.117
Pr.331
Pr.332
—
—
Pr.333
—
Pr.333
Pr.334
—
Pr.341
Pr.337