Mitsubishi Electric QJ71MB91 User Manual page 169

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