Rockwell-automation 1769-SM2 Compact I/O DSI/Modbus Communication Modu Manual de usuario Pagina 65
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Chapter 5
Understanding Explicit Messaging
This chapter provides information about explicit messaging.
Explicit messaging is used to read/write data that is not part of the
module’s I/O Image (Chapter
4), such as:
• Reading/writing drive parameters.
• Operating as a Modbus RTU Master and initiating Request/Response
messages to Modbus RTU Slave devices, such as PowerFlex 7-Class
drives with 20-COMM-H adapters.
The following table shows various products that can be used with the
1769-SM2 module and whether they support explicit messaging:
Contact your local Rockwell Automation, Inc. representative for
inquiries about the explicit message capabilities of products not
specified above.
Topic Page
Formatting Explicit Messages
5-2
Modbus RTU Master Operation Messages 5-9
Products
Supports Explicit Messaging
Yes No
MicroLogix 1500 LRP Series A and B, and
LSP processors
✔
MicroLogix 1500 LRP Series C (or newer) and
RSLogix 500 v6.30 (or higher)
Important: This LRP processor supports messaging
only for the first two I/O modules capable of messaging.
✔
RSLogix 500 versions prior to v6.30 ✔
Enhanced CompactLogix processors such as the -L31,
-L32E, and -L35E
✔
CompactLogix -L20 and -L30 processors ✔
1769-ADN DeviceNet adapter (see documentation for
possible future explicit messaging support)
✔
!
ATTENTION: Hazard of equipment damage exists. If Explicit
Messages are programmed to write parameter data to Non-Volatile
Storage (NVS) frequently, the NVS will quickly exceed its life cycle
and cause the drive to malfunction. Do not create a program that
frequently uses Explicit Messages to write parameter data to NVS.
- PowerFlex 1769-SM2 1
- Compact I/O DSI/Modbus 1
- Communications Module 1
- Important User Information 2
- Summary of Changes 3
- Table of Contents 5
- About This Manual 9
- Rockwell Automation Support 10
- P-4 About This Manual 12
- Getting Started 13
- Features 14
- Powerflex 4-Class Drives 15
- 1769-SM2 15
- Getting Started 1-5 17
- HVAC adapters 17
- Compatible Products 18
- Required Equipment 18
- Safety Precautions 19
- Quick Start 21
- Status Indicators 22
- Installing the Module 23
- Removing Power 24
- Mounting the Module 28
- Installing the Module 2-7 29
- ±0.4 mm (0.016 in.) 29
- DIN Rail Mounting 30
- Single Mode 32
- Grounding the Module 34
- To Drive 1 To Drive 2 35
- Network Cable Strain Relief 36
- Applying Power 36
- 2-16 Installing the Module 38
- Configuring the Module 39
- Configuration Tools 40
- Configuration Methods 41
- Controller Mode 41
- Before v6.30 42
- Parameter Mode 50
- DIAG PA R AM DSEL MEM SEL 51
- DIAG PARAM DSEL MEM SEL 51
- VALUE LIMITS SEL 51
- Changing the Idle Action 53
- Setting the RTU Baud Rate 55
- Selecting the RTU Format 55
- Setting the RTU Rx Delay Time 56
- Setting the RTU Tx Delay Time 56
- Resetting the Module 58
- Configuring the Module 3-21 59
- Flash Updating the Module 60
- Understanding the I/O Image 61
- Module Control Word 62
- Module Status Word 63
- Using Logic Command/Status 64
- Using Reference/Feedback 64
- Chapter 5 65
- Formatting Explicit Messages 66
- PowerFlex 4/40 Drives 82
- MicroLogix 1500 Controller 82
- CompactLogix Example Ladder 103
- Programs 103
- PowerFlex 40 Settings 104
- 1769-SM2 Settings 104
- CompactLogix Example Program 106
- Read Message (Rung 14) 109
- Write Message (Rung 17) 110
- Multi-Drive Mode 112
- PowerFlex 70 Setting 113
- 20-COMM-H Settings 114
- CH1 Drive 0: 123
- Modbus RTU operation 124
- Example Ladder Program 131
- Using RSLinx Classic 132
- Using RSNetWorx for DeviceNet 133
- Setting Up the 1769-ADN 134
- Example Program Data Table 151
- Troubleshooting 153
- MODULE Status Indicator 154
- CH1…CH3 Status Indicators 155
- Troubleshooting 9-5 157
- Viewing and Clearing Events 158
- Troubleshooting 9-7 159
- 9-8 Troubleshooting 160
- Specifications 161
- Environmental 162
- Regulatory Compliance 162
- DSI Cable Requirements 162
- Module Parameters 163
- B-2 Module Parameters 164
- Module Parameters B-3 165
- B-4 Module Parameters 166
- Module Parameters B-5 167
- B-6 Module Parameters 168
- Module Parameters B-7 169
- B-8 Module Parameters 170
- CIP/DSI Objects 171
- Supported Data Types 172
- CIP Identity Object 173
- CIP Parameter Object 174
- Instance Attributes 175
- (Continued) 175
- Services 176
- DSI Device Object 177
- DSI Device Object (Continued) 178
- DSI Parameter Object 180
- Descriptor Attributes 182
- CIP/DSI Objects C-13 183
- DSI Fault Object 184
- DSI Fault Object (Continued) 185
- DSI Diagnostic Object 186
- C-18 CIP/DSI Objects 188
- Command/Status Words 189
- Logic Status Word 190
- Glossary 191
- F Flash Update 192
- I Idle Action 193
- L Logic Command/Logic Status 193
- N NVS (Non-Volatile Storage) 193
- O Objects 193
- R Reference/Feedback 194
- S Scanner 195
- Z Zero Data 195
- Glossary-6 196
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