Mitsubishi QJ71MB91 User Manual page 28

2
SYSTEM CONFIGURATION
(3) Connecting master and slave stations separately through each interface
2
- 7 2.2 Network Configuration
(e) Connecting to a master station (1:n) with the link operation function
R
MODBUS master device
RS-232
Figure 2.9 Connecting to a master station (1:n) with the link operation function
(a) Using the RS-232 interface as the master station and the RS-422/485 interface as
the slave station
R
MODBUS master device
Figure 2.10 Using the RS-232 interface as the master station and the RS-422/485
(b) Using the RS-232 interface as the slave station and the RS-422/485 interface as
the master station
R
MODBUS master device
RS-232
Figure 2.11 Using the RS-232 interface as the slave station and the RS-422/485 interface
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
MODBUS
slave device
QJ71MB91
QJ71MB91
RUN ERR.
NEU. NEU.
CH1 SD SD CH2
RD RD RS-232
(Master function)
CH1
RS-232
SDA
1
SG
2
(Slave function)
SDB
3
(FG)
4
RDA
5
(FG)
6
RDB
7
CH2
RS-422
/485
RS-485
interface as the slave station
QJ71MB91
QJ71MB91
RUN ERR.
NEU. NEU.
CH1 SD SD CH2
RD RD
(Slave function)
CH1
RS-232
SDA
1
SG
2
SDB
3
(FG)
4
RDA
(Master function) 5
(FG)
6
RDB
7
CH2
RS-422
/485
MODBUS
slave device
as the master station
RS-485
R R
MODBUS
slave device
MODBUS
slave device
R R
MODBUS MODBUS
slave device slave device
RS-485
R R
MODBUS
slave device
R