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Using Math Instructions
8–1
8
Using Math Instructions
This chapter contains general information about math instructions and explains how
they function in your logic program. Each of the math instructions includes
information on:
• what the instruction symbol looks like
• typical execution time for the instruction
• how to use the instruction
In addition, the last section contains an application example for a paper drilling
machine that shows the math instructions in use.
Math Instructions
Instruction
Purpose
Page
Mnemonic Name
Purpose
Page
ADD Add Adds source A to source B and stores the result in
the destination.
8–4
SUB Subtract Subtracts source B from source A and stores the
result in the destination.
8–5
MUL Multiply Multiplies source A by source B and stores the
result in the destination.
8–8
DIV Divide Divides source A by source B and stores the result
in the destination and the math register.
8–9
DDV Double Divide Divides the contents of the math register by the
source and stores the result in the destination and
the math register.
8–10
CLR Clear Sets all bits of a word to zero. 8–11
SQR Square Root Calculates the square root of the source and places
the integer result in the destination.
8–11
SCL Scale Data Multiplies the source by a specified rate, adds to an
offset value, and stores the result in the destination.
8–12
Programming
- 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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