Rockwell-automation 20-COMM-R Remote I/O Adapter Manual de usuario Pagina 61
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Using Block Transfer Messaging 5-3
20-COMM-R Remote Adapter I/O User Manual
Publication 20COMM-UM004D-EN-P
See Block Transfer Read Structure to Receive Block Transfer Messages on
page 5-4 for a description of each word in a Block Transfer Read used to
receive an Explicit Message response.
Block Transfer Write Structure to Send Block Transfer Messages
Data Field Description
Word 0 Length
The least significant byte contains the length of the Explicit Message. The most
significant byte is always zero. This is the length of the actual message in bytes, not
the size of the BTW in words.
This length excludes the two bytes of word 0, but includes words 1 and 2, and all of
the data in the main body of the message to be sent. If using a scattered read or
write with class code 0x93, the length includes the zero(s) after the last parameter as
place holders. See pages C-9…C-14.
Word 1 0x81 and DPI Port
The least significant byte contains the value 0x81. The most significant byte is the
DPI port. For PowerFlex drives, you can access:
0 - Drive
1 - Device at Port 1 (HIM)
2 - Device at Port 2
3 - Device at Port 3
4 - Device at Port 4
5 - Device at Port 5 (adapter)
6 - Device at Port 6
Word 2 CIP Service
The least significant byte contains a CIP service. The most significant byte is always
zero (0). CIP services include the following:
0x0E - Get Attribute Single
0x10 - Set Attribute Single
0x4B - Get Attributes Scattered
0x4C - Set Attributes Scattered
Word 3 CIP Class
See Appendix C
, CIP Objects for a list of classes.
Word 4 CIP Instance
See Appendix C
, CIP Objects for an instances in each class.
Word 5 CIP Attribute
See Appendix C
, CIP Objects for a list of attributes in each class.
Word 6…19
Word 6…29
Word 6…59
Data or Padding
Data required for the message. The message must be either 20 words, 30 words, or
60 words. If it is not, pad the message with zeros.
- User Manual 1
- Important User Information 2
- Summary of Changes 3
- Table of Contents 5
- About This Manual 7
- Rockwell Automation 8
- Additional Resources 8
- Resource Description 9
- About This Manual P-3 9
- P-4 About This Manual 10
- Getting Started 11
- Features 12
- Compatible Products 13
- Required Equipment 13
- User-Supplied Equipment 14
- Safety Precautions 15
- Quick Start 16
- Installing the Adapter 17
- Commissioning the Adapter 18
- Connecting the Adapter to 20
- Applying Power 24
- 2-10 Installing the Adapter 26
- Configuring the Adapter 27
- Using the PowerFlex 7-Class 28
- HIM to Access Parameters 28
- Setting the Rack Address 29
- Setting the Baud Rate 30
- Setting the Starting Module 30
- Setting the Last Rack 31
- Setting the Rack Size 31
- Setting the I/O 32
- Configuration 32
- Setting a Fault Action 33
- Resetting the Adapter 34
- Viewing the Adapter Status 35
- Using Parameters 35
- Updating the Adapter 36
- Firmware 36
- Chapter 4 37
- Understanding the I/O Image 38
- Discrete I/O Image 40
- Size Valid Values 41
- 16-bit -32768 to 32767 41
- Block Transfer I/O Image 43
- Rules for Using Datalinks 44
- Datalink Scaling 45
- Example Ladder Logic 47
- Program Information 47
- ControlLogix Controller 48
- PLC-5 Controller Example 51
- Block Transfer Read 53
- Block Transfer Write 54
- All Controller Versions 55
- Chapter 5 59
- About Block Transfer 60
- Messaging 60
- Formatting Block Transfer 60
- Messages 60
- Executing Block Transfers 63
- Example Programs 64
- Ladder Logic Program 66
- SLC 500 Controller 69
- Examples 69
- Troubleshooting 75
- PORT Status Indicator 76
- MOD Status Indicator 76
- NET A Status Indicator 77
- Viewing Adapter Diagnostic 77
- Viewing and Clearing 79
- Table 6.B Adapter Events 80
- Specifications 81
- Regulatory Compliance 82
- Adapter Parameters 83
- CIP Objects 87
- Common Messages 88
- DPI Device Object 89
- DPI Parameter Object 91
- Descriptor Attributes 93
- Formulas for Converting 94
- Object-Specific Services 94
- DPI error code 95
- DPI Fault Object 101
- Instance Attributes 102
- DPI Alarm Object 103
- DPI Time Object 105
- C-20 CIP Objects 106
- Logic Command/Status Words 107
- Logic Status Word 108
- PowerFlex 700S (Phase II 109
- Control) and 700L (with 109
- 700S Control) Drives 109
- PowerFlex 750-Series Drives 111
- PowerFlex Digital DC Drives 113
- Glossary 115
- D Datalinks 116
- F Fault Action 117
- I Idle Action 118
- L Last RIO Rack 118
- N NVS (Nonvolatile Storage) 118
- R Rack Address 119
- S Scanner 120
- U Update 120
- Z Zero Data 120
- Rockwell Automation Support 128
- Documentation Feedback 128
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