Communication Specifications - Mitsubishi Electric 800 Series Instruction Manual

NOTE
• Terminals SD, SE and 5 are common terminals for I/O signals. (All common terminals are isolated from each other.) Do not
earth (ground) these terminals. Avoid connecting terminals SD and 5 and terminals SE and 5.
• Terminal SD is a common terminal for the contact input terminals (STF, STR, RH, RM, RL, MRS, and RES) and the pulse
train output terminal (FM). The open collector circuit is isolated from the internal control circuit by photocoupler.
• Terminal 5 is a common terminal for the frequency setting signal (terminal 2 or 4). Use a shielded or twisted cable to protect
the terminal from external noise.
• Terminal SE is a common terminal for the open collector output terminals (RUN and FU). The contact input circuit is isolated
from the internal control circuit by photocoupler.
1.6

Communication specifications

Item
Communication Mitsubishi inverter protocol (computer link
protocol communication)
Conforming
EIA-485 (RS-485)
standard
Number of
1:N (maximum 32 units), for stations No. 0 to
connectable
31
units
Communication
Selected among 4800/9600/19200/38400/57600/76800/115200 bps.
speed
Control
Asynchronous method
procedure
Communication
Half-duplex system, full-duplex system
method
Terminating
100 Ω (The availability can be switched by terminating resistor switch.)
resistor
18
PRE-OPERATION INSTRUCTIONS
Description
MODBUS RTU protocol
1:N (maximum 32 units), for stations No.
0 to 247
BACnet MS / TP protocol
255 (up to 32 for one segment,
addition with a repeater
available)
Selected among 9600/19200/
38400/57600/76800/115200
bps.
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