Rockwell-automation 1770-KF2 Data Highway or Highway Plus Interface Mo Manual de usuario Pagina 103
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Valorado. / 5. Basado en revisión del cliente
Message Packet Formats
Chapter 5
5-24
Enable Scan
This command restarts the PLC processor’s program scanner after a
physical write operation has been performed. Note that you must always
use the enable scan command to restart the PLC processor after a physical
write command.
Command
Format:
Reply Format:
TNSSTSCMD
07
SRCDST
TNSSTSCMD
47
SRCDST
FNC
03
Physical Read
This command reads bytes of data from the PC data table or program
memory. Use this command to upload the contents of PLC memory to
your computer.
Use the SIZE field to specify the number of bytes to be read. To specify a
number of PC words, SIZE should be an even value because PC words are
two bytes long.
Command
Format:
Reply Format:
TNSSTSCMD
04
SRCDST
TNSSTSCMD
44
SRCDST
ADDR
DATA
— Max. of 244 Bytes
SIZE
- Interface Module 1
- Important User Information 2
- Table of Contents 3
- Table of Contentsii 4
- Introduction 5
- Figure 1.1 7
- 1770-KF2 7
- Chapter 1 8
- Specifications 8
- Communication Concepts 13
- Figure 2.1 15
- Highway Network 15
- Figure 2.2 17
- Network Connected to V 17
- Installation 25
- Figure 3.2 28
- Figure 3.5 33
- Dimensions 33
- Chapter 3 39
- Figure 3.10 42
- Diagnostic 42
- (LED) Indicators 42
- Asynchronous Link Protocols 44
- Figure 4.1 47
- Figure 4.3 50
- Software 50
- Implementation of Data Paths 50
- Figure 4.6 52
- Protocol 52
- Environment 52
- Figure 4.7 54
- Logic for Implementing T 54
- Chapter 4 55
- Figure 4.13 62
- Message T 62
- Figure 4.14 67
- Figure 4.15 70
- Figure 4.24 78
- Message Sink Full, Case 2 78
- DLE ENQ STN BCC DLE EOT 79
- Message Packet Formats 80
- Figure 5.1 81
- Chapter 5 87
- Command Packet: 110
- Command Format: 116
- Data Encoding and Addressing 138
- Figure 6.1 139
- Numbers 139
- Figure 6.2 140
- Representation, Number 239 141
- Figure 6.3 141
- Figure 6.4 142
- Hexadecimal 142
- Figure 6.5 143
- 00100000 00000000 146
- First Byte Second Byte 146
- 00110100 00000000 151
- 00 0010100010 152
- 00 0000 0001000110 152
- Error Reporting 156
- Chapter 7 159
- Local Error Codes 164
- EXT STS byte 196
- Switch Settings 197
- Appendix A 198
- Message Formats 200
- (STS, EXT STS) 201
- Detailed Flowcharts 205
- Appendix D 206
- Data Link Layer 228
- Figure E.1 229
- Transition at Master Station 229
- Worldwide representation 235
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