Rockwell-automation 1775-KA PLC-3 Communication Adapter Module User Ma Manual de usuario Pagina 177
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Message Formats
Appendix A
A15
Word Range Read
Use this read command with a word symbol, a file symbol plus a word
offset, or a block address as a starting address. This starting address must
point to a word in a file. This read command can read a block of data.
The function code is 1. A special case of this command is the
single–word read, where the number of bytes to read is only two bytes
(one word).
Command Format:
A. Word symbol address
DLE
SRC C
0
S
TNS
MD
F
TS
TNS
STX
FNC PACKET
01
ASCII symbol
(8 characters max)
DLE ETX
BCC
00
W/F
00
SIZE
OFFSET
TOTAL
TRANS
00DST
B. File symbol address plus word offset
DLE
SRC C
0
S
TNS
MD
F
TS
TNS
STX
FNC PACKET
01
ASCII symbol
(8 characters max)
DLE ETX
BCC
00
W/F
00
SIZE
OFFSET
TOTAL
TRANS
00DST
WORD
OFFSET
C. Logical Address
DLE
SRC C
0
S
TNS
MD
F
TS
TNS
STX
FNC PACKET
01
PLC-3 logical symbol
(2-51 bytes)
DLE ETX
BCC
SIZE
OFFSET
TOTAL
TRANS
DST
Reply Format:
This is the same as he reply packet format for all reads.
A. Format when successful execution
DLE
C
S
TNS
MD
TS
TNS
STX
DLE ETX
BCC
DATA - Max of 244 bytes or 122 words
DST
SRC
4F
- User Manual 1
- Table of Contents 2
- Table of Contentsii 3
- Table of Contents iii 4
- Figure 1.1 9
- Communication 9
- Introduction 11
- Chapter 1 11
- Figure 1.3 12
- Modem Application 12
- Installation 13
- Figure 2.1 14
- Figure 2.2 15
- Switches 15
- Figure 2.3 18
- Two PLC-3 Controllers 18
- Chapter 2 19
- Figure 2.7 22
- Figure 2.10 29
- Connection 29
- Data Highway Communication 46
- #H024$B12:37 = 15 48
- $B45:21 = $I12:33 51
- Chapter 3 52
- Addressing Rules and Examples 57
- 10017-I 58
- Figure 4.4 61
- $N 15 : 0, 20 64
- @FILE_A:16/8 66
- $B1:5/012 66
- #H024$015,4 67
- #H015$0121/010 68
- #H 020 $ B 15:9 68
- #H 020 @ WORD_9 68
- Chapter 5 77
- Message Procedure Commands 79
- NUM = 0 86
- LOOP: $B50:(NUM) = NUM 86
- NUM = (NUM +1) 86
- $D:12 = TO_BCD (27) 88
- COUNT = FROM_BCD ($D:12) 88
- Figure 6.3 89
- for Comments 89
- Error Reporting 90
- Chapter 7 92
- Programming Examples 95
- Chapter 8 96
- Computer to PC Communication 100
- Figure 9.1 102
- Computer to PC Communiation 103
- Chapter 9 103
- Full-Duplex Protocol 105
- Figure 10.1 108
- Chapter 10 111
- Figure 10.7 114
- Transmitter 114
- for Full-Duplex Protocol 114
- 110046–I 121
- Figure 10.12 124
- Message T 124
- Half-Duplex Protocol 128
- Chapter 11 132
- Figure 11.4 140
- Figure 11.8 143
- with Message Returned 143
- Figure 11.9 144
- Duplicate 144
- Figure 11.11 146
- Sink Full, Case 2 146
- Figure 12.2 150
- Message Packet Format 150
- Figure 12.3 151
- Reply Message Packet Format 151
- Figure 12.4 158
- PLC/PLC-2 158
- Data Table Byte Addressing 158
- Chapter 12 160
- 0 0 0 0 0 0 0 0 161
- A8 A7 A6 A5 A4 A3 A2 A1 161
- Message Formats 163
- Appendix A 165
- Figure A.2 166
- Reply Format: 173
- Error Codes 193
- 1773-KA Module 196
- Appendix B 196
- Local and Reply Error Codes 196
- Diagnostic Counter Block 209
- Diagnostic Port Counters 210
- Appendix C 210
- Modem Port Counters 210
- Detailed Flowcharts 211
- Appendix D 212
- Figure D.11 220
- Figure D.20 227
- SLEEP and W 227
- AKEUP Interaction 227
- Figure D.21 228
- Routine 228
- Worldwide representation 239
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