Allen-Bradley MicroLogix 1400

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Publication 1766-RM001A-EN-P - October 2008

Communications Instructions 395

• DF1 Radio Modem

• Modbus RTU Master

• Ethernet

For a description of valid communication protocols, see Knowledgebase

Quick Starts on page 629.

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Default Chapter5
- Table of Contents5
Preface13
- Common Techniques Used in this Manual15
- Purpose of this Manual15
- Who Should Use this Manual15
Chapter 1 I/O Configuration Embedded I/O16
- Related Documentation16
- Rockwell Automation Support16
I/O Configuration18
- Micrologix 1400 Expansion I/O19
- Micrologix 1400 Expansion I/O Memory Mapping20
- I/O Addressing29
- I/O Forcing31
- Input Filtering31
- Analog Inputs32
- Analog Outputs34
- Latching Inputs35
- Configure Expansion37
Controller Memory and File Types39
- Types Data Files40
Chapter 249
- Protecting Data Files During Download49
- Static File Protection51
- Password Protection52
- Clearing the Controller Memory53
- Allow Future Access Setting (OEM Lock)54
- Web View Disable54
- LCD Edit Disable55
Chapter 3 Function Files Overview58
Function Files58
- Real-Time Clock Function File59
- RTA - Real Time Clock Adjust Instruction61
- Memory Module Information Function File62
- Base Hardware Information Function File64
- Communications Status File65
- Ethernet Communications Status File82
- Input/Output Status File91
- Publication 1766-RM001A-EN-P - October92
- Instruction Set93
- Using the Instruction Descriptions94
Chapter 5 High-Speed Counter Overview101
- Programmable Limit Switch Overview101
- High-Speed Counter (HSC) Function File102
- High-Speed Counter Function File Sub-Elements Summary104
- HSC Function File Sub-Elements105
- HSL - High-Speed Counter Load132
- RAC - Reset Accumulated Value133
- Programmable Limit Switch (PLS) File134
Chapter 6141
PTO - Pulse Train Output141
- Pulse Train Output Function141
- Pulse Train Outputs (PTOX) Function File145
- Pulse Train Output Function File Sub-Elements Summary146
- PWM - Pulse Width Modulation160
- Pulse Width Modulation (PWMX) Function File161
- PWM Function161
- Pulse Width Modulated Function File Elements Summary162
XIC - Examine if Closed XIO - Examine if Open169
Chapter 7171
- OTE - Output Energize171
- OTL - Output Latch OTU - Output Unlatch172
- ONS - One Shot173
- OSR - One Shot Rising OSF - One Shot Falling174
Chapter 8177
- Timer Instructions Overview177
- TON - Timer, On-Delay181
- TOF - Timer, Off-Delay182
- RTO - Retentive Timer, On-Delay183
- How Counters Work184
- CTU - Count up CTD - Count down187
- RES - Reset188
Chapter 9192
Using the Compare Instructions192
- EQU - Equal NEQ - Not Equal193
- GRT - Greater than LES - Less than193
- GEQ - Greater than or Equal to LEQ - Less than or Equal to194
- MEQ - Mask Compare for Equal195
- LIM - Limit Test196
Math Instructions199
Chapter 10 Using the Math Instructions200
- Updates to Math Status Bits202
- Using the Floating Point (F) Data File203
- ADD - Add SUB - Subtract207
- DIV - Divide207
- MUL - Multiply207
- ABS - Absolute Value208
- CLR - Clear208
- NEG - Negate208
- SCL - Scale210
- SCP - Scale with Parameters211
- SIN - Sine213
- SQR - Square Root213
- COS - Cosine216
- TAN - Tangent218
- ASN - Arc Sine220
- ACS - Arc Cosine222
- ATN - Arc Tangent223
- DEG - Radians to Degrees225
- RAD - Degrees to Radians227
- LN - Natural Log229
- LOG - Base 10 Logarithm231
- XPY - X Power y233
- CPT - Compute236
Chapter 11239
- RHC - Read High Speed Clock239
- RPC - Read Program Checksum241
- TDF - Compute Time Difference242
Application Specific Instructions239
Chapter 12 Using Decode and Encode Instructions245
Conversion Instructions245
- DCD - Decode 4 to 1-Of-16246
- ENC - Encode 1-Of-16 to 4247
- Publication 1766-RM001A-EN-P - October247
- FRD - Convert from Binary Coded Decimal (BCD)248
- TOD - Convert to Binary Coded Decimal (BCD)252
- GCD - Gray Code255
Chapter 13 Using Logical Instructions257
- Updates to Math Status Bits258
- AND - Bit-Wise and259
- OR - Logical or260
- XOR - Exclusive or261
- NOT - Logical NOT262
Chapter 14 MOV - Move263
- MVM - Masked Move266
Chapter 15 CPW - Copy Word270
- Chapter 15 File Instructions CPW - Copy Word270
- COP - Copy File271
- FLL - Fill File273
- BSL - Bit Shift Left274
- BSR - Bit Shift Right276
- FFL - First In, First out (FIFO) Load279
- FFU - First In, First out (FIFO) Unload281
- LFL - Last In, First out (LIFO) Load284
- LFU - Last In, First out (LIFO) Unload286
- SWP - Swap288
Chapter 16 Sequencer Instructions SQC- Sequencer Compare290
Chapter 16 SQC- Sequencer Compare290
- SQO- Sequencer Output293
- SQL - Sequencer Load296
Chapter 17 JMP - Jump to Label299
- JSR - Jump to Subroutine300
- LBL - Label300
- SBR - Subroutine Label300
- RET - Return from Subroutine301
- SUS - Suspend301
- TND - Temporary End301
- END - Program End302
- MCR - Master Control Reset302
- Publication 1766-RM001A-EN-P - October303
Input and Output Instructions IIM - Immediate Input with Mask305
Chapter 18307
- IOM - Immediate Output with Mask307
- REF- I/O Refresh308
Chapter 19 Information about Using Interrupts309
Using Interrupts309
- INT - Interrupt Subroutine314
- User Interrupt Instructions314
- STS - Selectable Timed Start315
- UID - User Interrupt Disable316
- UIE - User Interrupt Enable317
- UIF - User Interrupt Flush318
- Using the Selectable Timed Interrupt (STI) Function File320
- Using the Event Input Interrupt (EII) Function File324
Chapter 20 The PID Concept331
Process Control Instruction331
- The PID Equation332
- PD Data File333
- PID - Proportional Integral Derivative334
- Input Parameters335
- Output Parameters339
- Tuning Parameters341
- Runtime Errors351
- Analog I/O Scaling352
- Application Notes353
- Application Examples358
Chapter 21 General Information363
- Instruction Types and Operation364
- Protocol Overview365
- String (ST) Data File366
- Control Data File367
- ACL - ASCII Clear Buffers369
- AIC - ASCII Integer to String370
- AWA - ASCII Write with Append371
- AWT - ASCII Write374
- ABL - Test Buffer for Line376
- ACB - Number of Characters in Buffer377
- ACI - String to Integer378
- ACN - String Concatenate380
- AEX - String Extract381
- Publication 1766-RM001A-EN-P - October382
- AHL - ASCII Handshake Lines383
- ARD - ASCII Read Characters385
- ARL - ASCII Read Line386
- ASC - String Search388
- ASR - ASCII String Compare389
- Timing Diagram for ARD, ARL, AWA, and AWT Instructions391
- Using In-Line Indirection391
- ASCII Instruction Error Codes392
- ASCII Character Set394
ASCII Instructions363
Communications Instructions Messaging Overview395
Chapter 22398
- SVC - Service Communications398
- MSG - Message400
- The Message Element401
- Timing Diagram for the MSG Instruction409
- Communication Servicing Selection and Message Servicing Selection412
- MSG Instruction Ladder Logic413
- Local Messages415
- Configuring a Local Message416
- Local Messaging Examples425
- Remote Messages441
- Configuring a Remote Message444
- Configuring a Multi-Hop Remote Message on Ethernet/Ip Communication Channel447
- Configuring a Micrologix 1400 CIP Generic Message Via Ethernet463
- MSG Instruction Error Codes468
- Special Function with MSG Instruction470
- Configure MSG Setup Screen to Send SMTP Message476
Chapter 23 Overview481
- Socket Interface Architecture481
- Communicate with the Socket Object Via a MSG Instruction487
- Programming Considerations491
- Socket Object Services493
- Possible Error Codes for Socket Services510
Chapter 24 RCP - Recipe513
- Data Logging520
- Queues and Records520
- Configuring Data Log Queues525
- Publication 1766-RM001A-EN-P - October526
- DLG - Data Log Instruction527
Micrologix 1400 Memory527
- Data Log Status File528
- Retrieving (Reading) Records530
- Accessing the Retrieval File531
- Conditions that will Erase the Data Retrieval File534
Chapter 25 LCD Overview535
- LCD Function File536
- LCD Function File Sub-Elements Summary537
- LCD Function File Sub-Elements538
- LCD - LCD Instruction544
Appendix A547
- Programming Instructions Memory Usage and Execution Time547
- Scan Time Calculation552
Appendix B Status File Overview554
- Status File Details555
- Identifying Controller Faults579
Appendix C Contacting Rockwell Automation for Assistance587
Appendix D Communication Protocol590
- DF1 Full-Duplex Protocol594
- DF1 Half-Duplex Protocol595
- DF1 Radio Modem Protocol606
- Modbus RTU Protocol613
- ASCII Driver625
- Ethernet Driver627
- Knowledgebase Quick Starts # 17444 "Quick Start" Pulse Train Output (PTOX)631
- 17446 "Quick Start" Pulse Width Modulation (PWMX)634
- 17447 "Quick Start" High Speed Counter (HSC)636
- 17465 "Quick Start" Message (MSG)640
- 17501 "Quick Start" Selectable Timed Interrupt (STI)644
- 17503 "Quick Start" Real Time Clock (RTC)646
- 17558 "Quick Start" User Interrupt Disable (UID)648
- 18465 "Quick Start" RTC Synchronization between Controllers649
- Publication 1766-RM001A-EN-P - October649
- 18498 "Quick Start" Data Logging (DLG)652
Appendix 26 Binary Numbers663
- Hexadecimal Numbers665
- Hex Mask667
Glossary669

Allen-Bradley MicroLogix 1400 - Page 397

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