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2.7
Communication connectors and terminals
2.7.1
RS-485 terminals (connector)
Communication operation
• The RS-485 terminals enable communication operation from a personal computer, etc. When the PU connector is
connected with a personal, FA or other computer by a communication cable, a user program can run to monitor the inverter
or read and write parameters.
Communication can be performed with the Mitsubishi inverter protocol (computer link communication), the MODBUS RTU
protocol, or the BACnet MS/TP protocol.
For details, refer to the FR-E800 Instruction Manual (Communication).
Control circuit terminals (connector) layout
Pin number
1
SDA (RS-485)
2
SDB (RS-485)
3
SG (RS-485)
NOTE
• For information on other pin numbers and connection cables, refer to
Terminating resistor switch
Initially-set to "OPEN".
Set only the terminating resistor switch of
the remotest inverter to the "100Ω" position.
OPEN
100Ω
Viewed from the bottom of the inverter
22
21
20
19
11
10
9
Terminal symbol
Pin number
12
13
18
17
16
15
14
8
7
6
5
4
3
Terminal symbol
RDB (RS-485)
RDA (RS-485)
page
54.
2.7 Communication connectors and terminals
13
12
2
1
2. Installation and Wiring
1
2
3
4
5
6
7
8
9
10
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