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QJ71MB91
Mitsubishi QJ71MB91 User Manual
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11
TROUBLESHOOTING
11.3 Checkin
g the Communic
ation Status of QJ71MB91
11
- 18
9
PROGRAMMING
10
DEDICA
TED
INSTRUCTIONS
11
TROUBLESHOOTING
APPENDICES
INDEX
* 1 The NAK count defined by the MODBUS
protocol is stored in the Received N
AK count.
Note that this count is different from the NAK LED on the QJ71MB91.
* 2 It does not count when the request me
ssage is sent by the MBREQ in
struction.
322
324
Table of Contents
Default Chapter
3
Safety Precautions
3
Revisions
7
Table of Contents
8
Compliance with the EMC and Low Voltage Directives
13
The Manual's Usage and Structure
14
Troubleshooting •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••
15
About the Generic Terms and Abbreviations
16
Meanings and Definitions of Terms
17
Product Configuration
17
Chapter1 Overview
18
Features
18
Chapter2 System Configuration
22
Applicable Systems
22
Network Configuration
25
Precautions for System Configuration
29
How to Check the Function Version/Software Version
30
Chapter3 Specifications
33
Performance Specifications
33
Interface Specification
35
Connector Specification
35
Cable Specification
37
RS-422/485 Interface Specification
38
RS-422/485 Terminal Block Specification
38
RS-422/485 Cable Specification
39
Precautions When Transferring Data Using RS-422/485 Line
40
I/O Signals for Programmable Controller CPU
42
I/O Signal List
42
Applications and Assignment of Buffer Memory
45
Buffer Memory List
45
Chapter4 Modbus(R) Standard Functions
56
MODBUS(R) Standard Function Support List
56
Frame Specifications
65
Frame Mode
66
Protocol Data Unit Formats by Functions
70
Read Coils (FC: 01)
73
Read Discrete Inputs (FC: 02)
74
Read Holding Registers (FC: 03)
75
Read Input Registers (FC: 04)
76
Write Single Coil (FC: 05)
77
Write Single Register (FC: 06)
78
Read Exception Status (FC: 07)
79
Diagnostics (FC: 08)
80
Return Query Data (Sub-Function Code: 00)
80
Restart Communications Option (Sub-Function Code: 01)
81
Return Diagnostic Register (Sub-Function Code: 02)
83
Change ASCII Input Delimiter (Sub-Function Code: 03)
85
Force Listen Only Mode (Sub-Function Code: 04)
86
Clear Counters and Diagnostic Register (Sub-Function Code: 10)
88
Return Bus Message Count (Sub-Function Code: 11)
90
Return Bus Communication Error Count (Sub-Function Code: 12)
91
Return Bus Exception Error Count (Sub-Function Code: 13)
92
Return Slave Message Count (Sub-Function Code: 14)
93
Return Slave no Response Count (Sub-Function Code: 15)
94
Return Slave NAK Count (Sub-Function Code: 16)
95
Return Slave Busy Count (Sub-Function Code: 17)
96
Return Bus Character Overrun Count (Sub-Function Code: 18)
97
Return IOP Overrun Error Count (Sub-Function Code: 19)
98
Clear Overrun Counter and Flag (Sub-Function Code: 20)
99
Get Communications Event Counter (FC: 11)
100
Get Communications Event Log (FC: 12)
102
Write Multiple Coils (FC: 15)
105
Write Multiple Registers (FC: 16)
107
Report Slave ID (FC: 17)
108
Read File Record (FC: 20) (SC: 06)
110
Write File Record (FC: 21) (SC: 06)
112
Mask Write Register (FC: 22)
114
Read/Write Multiple Registers (FC: 23)
115
Chapter5 Functions
116
Function List
116
Master Function
118
Automatic Communication Function
118
Communication by Dedicated Instructions
131
Slave Function
132
Automatic Response Function
132
MODBUS(R) Device Assignment Function
133
Link Operation Function
136
Chapter6 Pre-Operational Procedures and Settings
138
Handling Precautions
138
Pre-Operational Procedures and Settings
138
Part Names
141
Unit Tests
143
Hardware Test
143
Self-Loopback Test
145
Connection to a Target Device
148
How to Connect the RS-232 Interface
149
How to Connect the RS-422/485 Interface
151
Intelligent Function Module Switch Setting
156
Maintenance, Inspection
161
When Removing or Installing the Module
161
Chapter7 Parameter Setting
162
Parameter Settings and Setting Procedure
162
Automatic Communication Parameter
165
Automatic Communication Parameter Details
165
MODBUS(R) Device Assignment Parameter
172
MODBUS(R) Device Assignment to the Programmable Controller CPU Device Memory
174
Register
176
QJ71MB91 Buffer Memory Assignment
185
Specifying the Error Status Read Device
187
Specifying Access Target When Mounted to MELSECNET/H Remote I/O Station
190
Specifying the CPU Response Monitoring Timer
191
CHAPTER8 UTILITY PACKAGE (GX Configurator-MB)
193
Functions of the Utility Package
193
Installing and Uninstalling the Utility Package
194
Handling Precautions
194
Operating Environment
197
Utility Package Operation
199
Common Utility Package Operations
199
Operation Overview
202
Starting the Intelligent Function Module Utility
204
Initial Setting
207
Automatic Communication Parameter
209
MODBUS(R) Device Assignment Parameter
211
Auto Refresh Setting
214
Monitor/Test
216
X/Y Monitor/Test
221
MODBUS(R) Device Assignment Parameter Status
223
Automatic Communication Status
224
Error Log
226
Communication Status
227
Chapter9 Programming
230
Parameter Setting
230
Automatic Communication Parameters
230
MODBUS(R) Device Assignment Parameters
233
Program Example for Normal System Configuration
237
Automatic Communication Parameters
237
MODBUS(R) Device Assignment Parameters
243
When Using the Automatic Communication Function and the Communication by Dedicated Instructions (MBRW, MBREQ) on the same Channel
247
Program Examples for Use in MELSECNET/H Remote I/O Network
254
Automatic Communication Parameters
254
MODBUS(R) Device Assignment Parameters
266
Chapter10 Dedicated Instructions
274
Dedicated Instruction List and Available Devices
274
Z(P).Mbrw
275
Z(P).Mbreq
287
Zp.uini
298
Chapter11 Troubleshooting
306
Checking QJ71MB91 Status
316
Contents••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• a
318
Checking the Communication Status of QJ71MB91
322
Error Codes
326
Error Code Storage Area
326
Exception Code List
333
Error Code List
335
Turning off the ERR. LED
346
Turning off the ERR. LED by GX Configurator-MB
346
Turning off the ERR. LED by Sequence Program
350
Turning off the ERR. LED by Request Message from the Master
352
4
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Mitsubishi QJ71MB91 Specifications
General
Brand
Mitsubishi
Model
QJ71MB91
Category
Controller
Language
English
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