Modbus(R) Device Assignment Parameter - Mitsubishi QJ71MB91 User Manual

7
PARAMETER SETTING

7.3 MODBUS(R) Device Assignment Parameter

Using MODBUS
with the programmable controller CPU device memory.
This allows direct access from the MODBUS compatible master device to the
programmable controller CPU device memory.
Programmable
controller CPU
No sequence
program required
Device
1234
D300
H
7
- 11 7.3 MODBUS(R) Device Assignment Parameter
device assignment parameters, the MODBUS
QJ71MB91 (Slave function)
R
MODBUS device assignment parameter
Device memory
MODBUS device R
D299 400499
D300 400500
D301 400501
RS-232, RS-422 or RS-485
Figure 7.6 MODBUS device and programmable controller CPU device
Request message (Write 1234
holding register 400500)
devices are correlated
MODBUS
R
Master device
to
H