Mitsubishi Electric QJ71MB91 User Manual page 22

1
OVERVIEW
(3) Link operation function
(4) Supporting high-speed communication of 115200 bps.
(5) Easy setting by GX Configurator-MB
1
- 4 1.1 Features
The master connected to the CH1 side (RS-232) can communicate with multiple
slaves connected to the CH2 side (RS-422/485) via the QJ71MB91.
This function allows the MODBUS master device with RS-232 interface (for one-on-
one communication) to communicate with multiple MODBUS slave devices.
Request
message
RS-232
Response
Message
MODBUS master device
(Third party programmable
controller)
Figure 1.4 Communication using the link operation function
The total transmission speed of up to 115200bps is available for Channel 1 and 2.
GX Configurator-MB, which is separately available, allows easy configuration of the
QJ71MB91.
It can reduce programing steps for sequence programs, and the setting and operating
states of each module can be checked easily.
Therefore, GX Configurator-MB is recommended to be used for the QJ71MB91.
By setting various parameters in GX Configurator-MB, the QJ71MB91 can
communicate without creating sequence programs.
The request message/response message
can be relayed between channel 1 and 2.
Request
message
RS-485
Response
Message
MODBUS slave device
(Third party remote I/O, etc)
MODBUS slave device
(Third party sensor, etc)