Communication Specifications - Mitsubishi Electric 800 Series Instruction Manual

4.5.1

Communication specifications

• The communication specifications are given below.
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
MODBUS RTU protocol
EIA-485 (RS-485)
1:N (maximum 32 units), setting is 0 to 247 stations
Selected among 300/600/1200/2400/4800/9600/19200/38400/57600/76800/115200
bps
Asynchronous system
Half-duplex system
Binary (fixed at 8 bits)
1 bit
Select from the following three types:
No parity check, stop bit length selectable between 1 bit and 2 bits
Odd parity check, stop bit length 1 bit
Even parity check, stop bit length 1 bit
CRC code check
Not used
Not used
Description
Related
parameter
Pr.549
—
Pr.331
Pr.332
—
—
—
—
Pr.333
Pr.334
—
—
—
61
PARAMETER
4