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QJ71MT91
Mitsubishi QJ71MT91 User Manual
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4 - 13
4 -
13
MELSEC-Q
4 MODBUS
R
STANDARD FU
NCTIONS
(W
hen comple
ted with an er
ror)
Data
Function code
Function code
(8F
H
)
Exception
code*
: W
hen com
pleted
with an
erro
r, the ex
cept
ion c
ode and
error c
ode ar
e stor
ed
into the buf
fer m
emor
y.
Refe
r to Se
ction 11
.3 for th
e stor
age locat
ion,
confir
mation
method an
d more
deta
ils.
51
53
Table of Contents
Default Chapter
3
Safety Precautions
3
Revisions
7
Table of Contents
8
Compliance with the EMC and Low Voltage Directives
12
The Manual's Usage and Structure
13
About the Generic Terms and Abbreviations
15
Meanings and Definitions of Terms
16
Product Configuration
16
1 Overview
17
Features
17
2 System Configuration
22
Applicable Systems
22
Devices Necessary for Network Configuration
25
System Configuration and Access Range
26
Precautions for System Configuration
28
How to Check the Function Version and Software Version
29
3 Specifications
31
Performance Specifications
31
I/O Signals for Programmable Controller CPU
32
I/O Signal List
32
Applications and Assignment of Buffer Memory
34
Buffer Memory List
34
Modbusr Standard Functions
40
4 Modbus Standard Functions
40
Modbus
40
Standard Function Support List
40
Frame Specifications
42
PDU Formats by Functions
43
Read Coils (FC: 01)
45
Read Discrete Inputs (FC: 02)
46
Read Holding Registers (FC: 03)
47
Read Input Registers (FC: 04)
48
Write Single Coil (FC: 05)
49
Write Single Register (FC: 06)
50
Write Multiple Coils (FC: 15)
51
Write Multiple Registers (FC: 16)
53
Read File Record (FC: 20) (SC: 06)
54
Write File Record (FC: 21) (SC: 06)
56
Mask Write Register (FC: 22)
58
Read/Write Multiple Registers (FC:23)
59
5 Functions
60
Function List
60
Master Function
62
Automatic Communication Function
62
Dedicated Instructions
68
Slave Function
69
Automatic Response Function
69
MODBUS Device Assignment Function
70
Keepalive Function
71
Router Relay Function
73
GX Developer Connection Function
74
6 PRE-OPERATIONAL PROCEDURES and SETTING 6- 1 to
75
Handling Precautions
75
Pre-Operational Procedures and Setting
75
Part Names
78
Connection to Ethernet
80
Unit Tests
82
Hardware Test
82
Self-Loopback Test
83
Intelligent Function Module Switch Setting
84
Communication Starting Conditions Depending on Basic Parameter/Modbus
89
Device Assignment
94
Parameter Starting Method Setting
94
7 Parameter Setting
94
Parameter Settings and Setting Procedure
94
Basic Parameters
99
Basic Parameters Details
99
TCP/UDP/IP Setting
99
GX Developer Connection Information Setting
100
MODBUS ® /TCP Setting
110
Automatic Communication Parameters
112
Automatic Communication Parameters Details
112
MODBUS Device Assignment Parameters
116
MODBUS ® Device Sizes
118
MODBUS ® Device Assignment Parameters Details
119
Default Assignment Parameters
122
MODBUS ® Extended File Register Assignment
124
QJ71MT91 Buffer Memory Assignment
125
8 UTILITY PACKAGE (GX Configurator-MB)
127
Functions of the Utility Package
127
Installing and Uninstalling the Utility Package
128
Operating Environment
130
Utility Package Operation
132
Operation Overview
135
Starting the Intelligent Function Module Utility
137
Initial Setting
137
Auto Refresh Setting
141
Monitor/Test
143
X/Y Monitor/Test
143
Automatic Communication Status
150
Error Log
152
Communication Status
153
PING Test
155
Parameter Setting Using GX Configurator-MB
156
Basic Parameters
156
Automatic Communication Parameters
159
MODBUS Device Assignment Parameters
161
9 Programming
163
Parameter Setting
163
Basic Parameter Setting
163
Automatic Communication Parameter Setting
166
MODBUS ® Device Assignment Parameter Setting
169
Program Example for Normal System Configuration
173
System Configuration and Program Conditions
173
Program Using Utility Package
180
Program Without Using Utility Package
184
Program Example for Use in MELSECNET/H Remote I/O Network
191
System Configuration and Program Conditions
191
Program Using Utility Package
197
Program Without Using Utility Package
201
10 Dedicated Instructions
212
Dedicated Instruction List and Available Devices
212
Z(P).Mbrw
213
Z(P).Mbreq
222
11 Troubleshooting
230
Confirming QJ71MT91 Status
239
Error Codes
242
Error Code Storage Areas
242
Exception Code List
248
Error Code List
250
Turning off the COM.ERR. LED
266
From GX Configurator-MB
266
Program Example for Use of Sequence Program
269
Conducting PING Test to Check QJ71MT91 Connection
270
From GX Configurator-MB
271
Program Example for Use of Sequence Program
275
Appendices
278
Appendix 1 External Dimensions
278
Appendix 2 Processing Time
279
Appendix 3 GX Developer Connection Setup Example
282
5
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Mitsubishi QJ71MT91 Specifications
General
Brand
Mitsubishi
Model
QJ71MT91
Category
Controller
Language
English
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