Mitsubishi QJ71MB91 User Manual

7
PARAMETER SETTING
7.2 Automatic Communication Parameter
7.2.1 Automatic communication parameter details
7 - 8
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) Type specification of the target MODBUS device
Specify the types of the read/write target MODBUS devices.
(a) Setting range
Available combinations of the read and write targets are as shown in the table
below.
No other combinations are available.
* 1 To perform only read or write, set "0" to each of the following:
Head buffer memory address ( This section (6))
Target MODBUS device head number ( This section (7))
Access points ( This section (8))
* 2 Reading and writing can be performed simultaneously with one instruction only when 0505
H
(Read/write multiple registers) is set.
* 3 Broadcast can be performed with 0001
H (Write multiple coils) and 0005H (Write multiple registers)
only.
Figure 7.5 Structure for Type specification of the target MODBUS device
Table7.2 Type specification of the target MODBUS device
Setting value
Target MODBUS device type
00H No specification
01H Coil
02H Input
04H Input register
05H Holding register
Table7.3 Setting range for Type specification of the target MODBUS device
Type specification of the target MODBUS device
Function code
Setting
value
Read target Write target
0100
H
Coil
No specification
*1
01 Read coils
0200
H
Input 02 Read discrete inputs
0400
H
Input register 04 Read input registers
0500
H
Holding register 03 Read holding registers
0001
H
No specification
*1
Coil
*3
15 Write multiple coils
0005
H
Holding register
*3
16 Write multiple registers
0505
H
Holding register
*2
Holding register 23 Read/write multiple registers
b15 b8 b7 b0
Read target Write target

Mitsubishi QJ71MB91 Specifications

General

Brand	Mitsubishi
Model	QJ71MB91
Category	Controller
Language	English