Mitsubishi QJ71MB91 User Manual page 27

2
SYSTEM CONFIGURATION
(2) Using the QJ71MB91 as a slave station
(a) Connecting to a master station (1:1) with a RS-232 line
(b) Connecting to a master station (1:1) with a RS-422/485 line
(c) Connecting to master stations (1:1) with RS-232 and RS-422/485 lines
(d) Connecting to a master station (1:n)
R
MODBUS master device
RS-232
Figure 2.5 Connecting to a master station (1:1) with a RS-232 line
R
MODBUS master device
RS-422/485
Figure 2.6 Connecting to a master station (1:1) with a RS-422/485 line
R
MODBUS master device
R
MODBUS master device
Figure 2.7 Connecting to master stations with RS-232 and RS-422/485 lines
* 1 The same station number is used for both RS-232 and RS-422/485 interfaces.
R
MODBUS master device
R
MODBUS
slave device
Figure 2.8 Connecting to a master station (1:n)
QJ71MB91 (Slave function)
QJ71MB91
RUN ERR.
NEU. NEU.
CH1 SD SD CH2
RD RD
CH1
RS-232
SDA
1
SG
2
SDB
3
(FG)
4
RDA
5
(FG)
6
RDB
7
CH2
RS-422
/485
QJ71MB91 (Slave function)
QJ71MB91
RUN ERR.
NEU. NEU.
CH1 SD SD CH2
RD RD
CH1
RS-232
SDA
1
SG
2
SDB
3
(FG)
4
RDA
5
(FG)
6
RDB
7
CH2
RS-422
/485
QJ71MB91 (Slave function) *
QJ71MB91
RUN ERR.
NEU. NEU.
CH1 SD SD CH2
RD RD
RS-232
CH1
RS-232
RS-422/485
SDA
1
SG
2
SDB
3
(FG)
4
RDA
5
(FG)
6
RDB
7
CH2
RS-422
/485
RS-485
QJ71MB91
RUN ERR.
NEU. NEU.
CH1 SD SD CH2
RD RD
CH1
RS-232
SDA
1
SG
2
SDB
3
(FG)
4
RDA
5
(FG)
6
RDB
7
CH2
RS-422
/485
QJ71MB91 (Slave function)
2.2 Network Configuration
1
R
MODBUS slave
device
2
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