Mitsubishi QJ71MB91 User Manual

9
PROGRAMMING
9.2 Program Example for Normal System Configuration
9.2.3 When using the automatic communication function and the communication by dedicated instructions on the same channel
9 - 18
9
PROGRAMMING
10
DEDICATED INSTRUCTIONS
11
TROUBLESHOOTINGAPPENDICESINDEX
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
In the following system configuration, the automatic communication parameter and
dedicated instructions shall be used 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".
Figure 9.20 System configuration example for use of the automatic
communication function and dedicated instructions on the same channel
GX Developer
MODBUS slave device
(station No.1)
R
Setting target
4
2
5
3
1
6
7
(FG)
(FG)
RS-232
/485
RS-422
CH2
RDB
RDA
SDB
SG
SDA
CH1
QJ71MB91
RUN
RD
NEU.
SD
NEU.
RD
SD
CH1
CH2
ERR.
QJ71MB91*1
(master function)
CH2 (RS-422/485)
Communicated by automatic communication function + dedicated instructions

Mitsubishi QJ71MB91 Specifications

General

Brand	Mitsubishi
Model	QJ71MB91
Category	Controller
Language	English