EasyManuals Logo

Mitsubishi QJ71MB91 User Manual

Mitsubishi QJ71MB91
372 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #133 background imageLoading...
Page #133 background image
5
FUNCTIONS
5.3 Slave Function
5.3.2 MODBUS(R) device assignment function
5 - 18
1
OVERVIEW
2
SYSTEM
CONFIGURATION
3
SPECIFICATIONS
4
MODBUS(R) STANDARD
FUNCTIONS
5
FUNCTION
6
PRE-OPERATIONAL
PROCEDURES AND
SETTINGS
7
PARAMETER SETTING
8
UTILITY PACKAGE
(GX Configurator-MB)
5.3.2 MODBUS(R) device assignment function
The MODBUS device assignment function automatically converts access to a slave
(QJ71MB91) MODBUS device into access to a programmable controller CPU device.
This allows direct access from the MODBUS compatible master device to the
programmable controller CPU device memory.
Supporting the MODBUS devices of large capacity, the QJ71MB91 allows all device
memories of the programmable controller CPU to be assigned.( Section 7.3.1)
(1) MODBUS device assignment parameter setting
Set the MODBUS device assignment parameters to the slave (QJ71MB91).
The following settings are possible for the MODBUS device assignment
parameters.
(a) Correlating the MODBUS device to the programmable controller CPU device
memory.
When a message requesting an action such as write coil is received from the
master, the access to the MODBUS device is automatically converted into
access to the programmable controller CPU device.( Section 7.3.1 to Section
7.3.3)
Figure 5.13 MODBUS device and programmable controller CPU device
D300
R
R
D299 400499
D300 400500
D301 400501
Device
Programmable
controller CPU
No sequence
program required
QJ71MB91 (Slave function)
MODBUS device assignment parameter
Device memory
MODBUS device
Request message (Write 1234H to holding
register 400500)
MODBUS
Master
device
RS-232, RS-422 or RS-485
1234
H
R

Table of Contents

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the Mitsubishi QJ71MB91 and is the answer not in the manual?

Mitsubishi QJ71MB91 Specifications

General IconGeneral
BrandMitsubishi
ModelQJ71MB91
CategoryController
LanguageEnglish

Related product manuals