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Reference
Understanding the Communication Protocols
D–1
D
Understanding the Communication
Protocols
Use the information in this appendix to understand the differences in
communication protocols. The following protocols are supported from the RS-232
communication channel:
• DF1 Full-Duplex and DF1 Half-Duplex Slave
All MicroLogix 1000 controllers support the DF1 full-duplex protocol. Series
D or later discrete and all MicroLogix 1000 analog controllers also support DF1
half-duplex slave protocol.
• DH-485
Series C or later discrete and all MicroLogix 1000 analog controllers can
communicate on DH-485 networks using an AIC+ Advanced Interface
Converter.
For information about required network connecting equipment, see chapter 3,
Connecting the System.
- MicroLogix 1000 1
- Programmable 1
- Controllers 1
- Allen-Bradley 1
- Important User Information 2
- Table of Contents 3
- toc–iii 5
- Summary of Changes 9
- • the purpose of this manual 11
- • Allen-Bradley support 11
- Who Should Use this Manual 12
- Purpose of this Manual 12
- Contents of this Manual 13
- Glossary 14
- Related Documentation 15
- Allen-Bradley Support 16
- Installing Your Controller 17
- EMC Directive 18
- • EN 50081-2 18
- • EN 50082-2 18
- Hardware 19
- Hardware Overview 19
- Master Control Relay 20
- Schematic (Using IEC Symbols) 22
- Using Surge Suppressors 24
- Recommended Surge Suppressors 26
- Safety Considerations 27
- Power Distribution 28
- Power Considerations 29
- Preventing Excessive Heat 31
- Controller Spacing 32
- Mounting the Controller 32
- Using Mounting Screws 34
- Wiring Your Controller 35
- Grounding Guidelines 36
- Sinking and Sourcing Circuits 37
- Wiring Recommendations 38
- 1761-L16AWA Wiring Diagram 41
- 1761-L32AWA Wiring Diagram 42
- HardwareHardware 43
- 1761-L32AAA Wiring Diagram 49
- 0V dc 5V dc 51
- 26.4V dc @ 55° C (131° F) 51
- 0V dc 26.4V dc20.4V dc 51
- 1761-L20AWA-5A Wiring Diagram 52
- 85–264 VAC 53
- 0V dc 5V dc 14V dc 54
- 0V dc 125V dc5V dc 54
- 0V ac 264V ac5V ac 54
- Grounding 55
- O/4 O/5 O/6 56
- I/10 I/11 56
- Analog Voltage Input Range 57
- Analog Current Input Range 57
- Analog Voltage Output Range 57
- Analog Current Output Range 57
- Applications 58
- Connecting the System 59
- Connecting the DF1 Protocol 60
- Constructing 62
- DH-485 Communication Cable 64
- Connecting the AIC+ 67
- DH-485 Network Connection 68
- DF1 Isolated Modem Connection 69
- 1761-CBL-PM02 71
- 1761-CBL-AP00 71
- supplied cable 71
- connector Port 3 72
- DB-9 RS-232 Port 1 72
- Powering the AIC+ 73
- Establishing Communication 75
- DeviceNet Communications 76
- Programming Overview 77
- Principles of Machine Control 78
- Maximum) 80
- (8 Maximum) 80
- Accessed 82
- Power Down 84
- Power Up 84
- Addressing Data Files 86
- Specifying Indexed Addresses 88
- Developing 91
- Development 92
- Program Development 92
- Checklist 92
- Using Analog 93
- I/O Image 94
- I/O Configuration 95
- Input Filter and Update Times 95
- Update Examples 96
- Input Channel Filtering 96
- Converting Analog Data 97
- Converting Analog Output Data 98
- Using Basic Instructions 99
- About the Basic Instructions 100
- Bit Instructions Overview 101
- Programming 101
- Examine if Closed (XIC) 102
- Examine if Open (XIO) 102
- Output Energize (OTE) 103
- Using OTL 104
- Using OTU 104
- One-Shot Rising (OSR) 105
- Timer Instructions Overview 106
- Timer On-Delay (TON) 109
- Timer Off-Delay (TOF) 110
- Retentive 112
- Counter Instructions Overview 113
- Entering Parameters 114
- Addressing Structure 114
- Count Up (CTU) 116
- Count Down (CTD) 117
- Reset (RES) 118
- Application Example 119
- Using Comparison Instructions 123
- Indexed Word Addresses 124
- Equal (EQU) 125
- Not Equal (NEQ) 125
- Less Than (LES) 125
- Less Than or Equal (LEQ) 126
- Greater Than (GRT) 126
- Greater Than or Equal (GEQ) 126
- Using Math Instructions 133
- About the Math Instructions 134
- Math Instructions Overview 134
- Add (ADD) 136
- Subtract (SUB) 137
- Multiply (MUL) 140
- Divide (DIV) 141
- Double Divide (DDV) 142
- Clear (CLR) 143
- Square Root (SQR) 143
- Scale Data (SCL) 144
- Convert to BCD (TOD) 151
- Convert from BCD (FRD) 153
- Decode 4 to 1 of 16 (DCD) 156
- Encode 1 of 16 to 4 (ENC) 157
- Using FLL 160
- • Length is the number of wor 160
- Overflow Trap Bit, S:5/0 162
- Move (MOV) 163
- Masked Move (MVM) 164
- And (AND) 166
- Exclusive Or (XOR) 168
- Not (NOT) 169
- Negate (NEG) 170
- Operation 174
- Using Program Flow Control 179
- Instructions 179
- Jump (JMP) and Label (LBL) 180
- Return (RET) 182
- Using SBR 184
- Using RET 184
- Master Control Reset (MCR) 185
- Temporary End (TND) 186
- Suspend (SUS) 186
- Machine Application Example 188
- Using Application Specific 189
- • Bit Address 192
- Bit Shift Left (BSL) 193
- Bit Shift Right (BSR) 194
- Using SQO 198
- Sequencer Load (SQL) 201
- Selectable 203
- Between instruction updates 204
- Between communication packets 204
- At start and end 204
- Interrupt Subroutine (INT) 208
- Using High-Speed Counter 215
- High-Speed Counter (HSC) 220
- High-Speed Counter Load (HSL) 232
- (µsec) when: 236
- True False 236
- 56.00 6.00 236
- Execution Times 236
- Using HSD 238
- Example 1 240
- Example 3 242
- Using the Message Instruction 249
- Types of Communication 250
- Message Instruction (MSG) 251
- • Control Block Address 252
- MSG Instruction Error Codes 258
- SLC500/ML1000 263
- TIMER ON DELAY 264
- Timer T4:0 264
- Time Base 0.01 264
- Preset 400 264
- Example 5 266
- Troubleshooting Your System 269
- When Operating Normally 270
- Troubleshooting 271
- Identifying Controller Faults 274
- • controller LED status 278
- Hardware Reference 279
- Controller Specifications 280
- Reference 281
- General Output Specifications 283
- Analog Input Specifications 284
- Analog Output Specifications 284
- -L32BBB controllers) 286
- -L32AAA controllers) 286
- Controller Dimensions 287
- Replacement Parts 288
- Programming Reference 289
- NA = Not Applicable 302
- ReferenceReference 307
- User Interrupt Latency 312
- Execution Time Worksheet 314
- Available 316
- Available Addressing Modes 317
- ➀ Indexed 322
- , C, or R addresses 322
- Protocols 329
- DF1 Full-Duplex Protocol 331
- Modem Modem Modem 335
- Ownership Timeout 336
- DH-485 Communication Protocol 339
- DH-485 Token Rotation 340
- • baud rate 346
- Typical 3-Node Network 348
- Network 348
- (not expandable) 348
- Application Example Programs 351
- Drill Mechanism Operation 354
- Conveyor Operation 354
- Drill Calculation and Warning 354
- Bottle Line Example 371
- Bottle Line Ladder Program 372
- Conveyor 374
- On/Off Circuit Ladder Program 384
- Spray Booth Ladder Program 388
- Adjustable 391
- Calibration 393
- Calibration Procedure 395
- Worldwide 422
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