When Using The Automatic Communication Function And The Communication By Dedicated Instructions (Mbrw, Mbreq) On The Same Channel - Mitsubishi QJ71MB91 User Manual

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PROGRAMMING
9.2.3 When using the automatic communication function and the
communication by dedicated instructions on the same channel
This section explains the setting and programming for using the automatic communication
function and the communication by dedicated instructions (MBRW and MBREQ
instructions) on the same channel.
(1) System configuration
9.2.3 When using the automatic communication function and the communication by dedicated instructions on the same channel
In the following system configuration, the automatic communication parameter and
dedicated instructions shall be used on the same channel.
Setting target
(master function)
GX Developer
Communicated by automatic communication function + dedicated instructions
Figure 9.20 System configuration example for use of the automatic
communication function and dedicated instructions on the same channel
* 1 The QJ71MB91 is to be mounted in slot 0 of the base unit with the head I/O No. set to "0".
MODBUS slave device
QJ71MB91*1
(station No.1)
QJ71MB91
RUN ERR.
NEU. NEU.
CH1 SD SD CH2
RD RD
CH1
RS-23 2
SDA
1
SG
2
SDB
3
(FG)
4
RDA
5
(FG)
6
RDB
7
CH2
RS-42 2
/485
CH2 (RS-422/485)
9.2 Program Example for Normal System Configuration
R
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