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IEC 1131-3 Instructions
10-12
S7-200 Programmable Controller System Manual
C79000-G7076-C233-01
Off-Delay Timer
The Off-Delay Timer function block is used to delay the
setting of an output false for a fixed period of time after
the input goes false. It times up to the preset value when
the enabling input (IN) goes false. When the elapsed
time (ET) is greater than or equal to the preset time (PT),
the timer output bit (Q) turns on.
Once the preset is reached, the timer output bit turns false and the elapsed time is
maintained until the enabling input (IN) makes the transition to true. If the enabling
input (IN) makes the transition to false for a period of time shorter than the preset
time (PT), the output bit remains true.
For information about timer numbers and resolutions, refer to Table 10-3.
Inputs/Outputs Operands Data Types
IN (LAD) Power Flow BOOL
IN (FBD) I, Q, M, SM,T, C, V, S, L, Power Flow BOOL
PT (LAD & FBD) VW, IW, QW, MW, SMW, LW, SW, AIW, AC, Constant, *VD, *AC, *LD INT
Q (LAD & FBD) I, Q, M, SM, V, S, L BOOL
ET (LAD & FBD) VW, IW, QW, MW, SMW, LW, SW, AQW, AC,*VD, *AC, *LD INT
xxx refer to Table 10-3 TOF
Pulse Timer
The Pulse Timer function block is used to generate
pulses for a specific duration. As the enabling input (IN)
becomes true, the output bit (Q) turns on. The output bit
remains true for the pulse specified within the preset time
(PT). Once the elapsed time (ET) reaches preset (PT),
the output bit (Q) becomes false.
For information about timer numbers and resolutions, refer to Table 10-3.
Inputs/Outputs Operands Data Types
IN LAD) Power Flow BOOL
IN (FBD) I, Q, M, SM, T, C, V, S, L, Power Flow BOOL
PT (LAD & FBD) VW, IW, QW, MW, SMW, LW, SW, AIW, AC, Constant, *VD, *AC, *LD INT
Q (LAD & FBD) I, Q, M, SM, S, V, L BOOL
ET (LAD & FBD) VW, IW, QW, MW, SW, LW, AQW, AC, *VD, *AC, *LD INT
xxx refer to Table 10-3 TP
L
A
D
TOF
IN
xxx
F
B
D
Q
ET
222 224
333
221
PT
L
A
D
TP
IN
xxx
F
B
D
PT
Q
ET
222 224
333
221
- Qualified Personnel 2
- Correct Usage 2
- Trademarks 2
- Safety Guidelines 2
- Important Notes 3
- Scope of the Manual 4
- Agency Approvals 4
- Related Information 4
- How to Use This Manual 5
- Additional Assistance 5
- Contents 10
- Equipment Requirements 12
- S7-200 CPU 14
- Expansion Modules 15
- Installing an S7-200 PLC 17
- Installation Configuration 18
- Standard Rail Requirements 20
- Panel-Mounting Dimensions 20
- General Guidelines 25
- Connector 27
- Protecting DC Transistors 32
- 2.5 Power Considerations 34
- Programming System 37
- 3.1 Overview 38
- Pre-Installation Instructions 39
- Designing the Safety Circuits 49
- Opn_Drn_PB 51
- Drain_Sol 51
- Statement List Editor 52
- Before Load After Load 53
- Before And After And 53
- Before Or After Or 53
- Ladder Logic Editor 54
- Function Block Diagram Editor 55
- Instructions 56
- Overloaded Instructions 61
- Organizing the Program 64
- MAIN PROGRAM OB1 67
- SUBROUTINE 0 67
- INTERRUPT ROUTINE 0 67
- Reading the Digital Inputs 68
- Executing the Program 69
- Interrupting the Scan Cycle 70
- Immediate I/O 70
- STOP mode 72
- RUN mode 72
- Restricting Access to the CPU 73
- Configuring the CPU Password 74
- Forcing Specific Values 80
- Responding to Fatal Errors 83
- Representation of Numbers 88
- [timer number] 91
- [counter number] 92
- [starting byte address] 93
- [accumulator number] 94
- Using Constant Values 96
- Creating a Pointer 97
- Modifying Pointers 98
- Loses Power 101
- Retaining Memory on Power On 101
- Number of 103
- C79000-G7076-C233-01 105
- Chapter Overview 109
- Module 0 Module 1 Module 3 111
- 6.3 Pulse Catch 113
- 6.5 Analog Input Filter 117
- 6.6 High-Speed I/O 118
- High-Speed Pulse Output 120
- 6.7 Analog Adjustments 121
- Network Connector 124
- STEP 7-Micro/WIN 32 supports 125
- Communications Setup 128
- 7.4 Communicating With Modems 138
- Configure 141
- Modem Setup 142
- 7.5 Network Overview 149
- PPI Protocol 151
- MPI Protocol 151
- PROFIBUS Protocol 152
- 7.6 Network Components 153
- Network Connectors 154
- Cable for a PROFIBUS Network 155
- Network Repeaters 156
- 7.8 Network Performance 163
- Token Rotation 164
- Sending Messages 165
- Token Rotation Time 166
- Token Rotation Comparison 167
- Programming 170
- is the title 171
- on-delay 100 ms 175
- SIMATIC Instructions 177
- Standard Contacts 178
- Immediate Contacts 179
- Positive, Negative Transition 180
- Contact Examples 181
- Output Immediate 182
- Set, Reset (N Bits) 183
- No Operation 184
- Output Examples 185
- Compare Byte 186
- Compare Integer 187
- Compare Double Word 188
- Compare Real 189
- Comparison Contact Examples 190
- 1-Millisecond Resolution 194
- 10-Millisecond Resolution 194
- 100-Millisecond Resolution 194
- On-Delay Timer Example 196
- Off-Delay Timer Example 198
- Counter Examples 201
- Using the High-Speed Counter 204
- [high-speed counter number] 212
- Control Byte 214
- Status Byte 215
- HSC Interrupts 216
- High-Speed Counter Example 223
- Pulse Output 225
- PWM Operation 226
- PTO Operation 227
- PTO/PWM Control Registers 232
- PWM Initialization 235
- Math Examples 253
- Increment, Decrement Example 256
- Add Real, Subtract Real 257
- Multiply Real, Divide Real 258
- PID Loop 260
- PID Algorithm 261
- Proportional Term 263
- Integral Term 263
- Differential Term 264
- Selection of Loop Control 264
- Variables and Ranges 267
- Error Conditions 269
- Loop Table 269
- PID Program Example 270
- Square Root 274
- Block Move Example 277
- Swap Bytes 278
- Move and Swap Examples 278
- Memory Fill 279
- Fill Example 279
- Add to Table 280
- Add to Table Example 281
- Table Find 282
- Table Find Example 283
- First-In-First-Out 284
- First-In-First-Out Example 284
- Last-In-First-Out 285
- Last-In-First-Out Example 285
- Invert Example 291
- shifted 292
- Shift and Rotate Examples 298
- Shift Register Bit 299
- Shift Register Bit Example 301
- Double Integer to Real 302
- Truncate 303
- Double Integer to Integer 304
- Integer to Double Integer 304
- Byte to Integer 305
- Integer to Byte 305
- Convert Example 306
- Decode, Encode Examples 308
- Segment Example 310
- ASCII to HEX, HEX to ASCII 311
- ASCII to HEX Example 311
- Integer to ASCII 312
- Double Integer to ASCII 314
- Real to ASCII 315
- Watchdog Reset 318
- Stop, End, and WDR Example 319
- Jump to Label, Label 320
- Jump to Label Example 320
- For, Next 326
- For/Next Example 328
- Sequence Control Relay 329
- Restrictions 330
- SCR Example 331
- Divergence Control 333
- Convergence Control 335
- Return from Interrupt 343
- Interrupt Routines 343
- Interrupt Use Guidelines 343
- System Support for Interrupt 343
- Communication Port Interrupts 345
- I/O Interrupts 345
- Time-Based Interrupts 347
- Interrupt Examples 350
- Network Read, Network Write 352
- Transmit, Receive 358
- Understanding Freeport Mode 359
- Freeport Initialization 360
- Receive and Transmit Example 365
- And Load 368
- Logic Push 368
- Logic Read 368
- Logic Pop 369
- Load Stack 369
- Logic Stack Operations 369
- Logic Stack Example 370
- IEC 1131-3 Instructions 373
- 10.1 IEC Bit Logic 374
- Set, Reset 376
- Set Dominant Bistable 378
- Reset Dominant Bistable 378
- 10.2 IEC Compare Instructions 379
- Compare Not Equal 380
- Compare Less Than 380
- Compare Less Than or Equal 381
- Compare Greater Than 381
- Compare Greater Than or Equal 382
- 10.3 IEC Timer Instructions 383
- Off-Delay Timer 384
- Pulse Timer 384
- Pulse Timer Example 386
- 10.4 IEC Counter Instructions 387
- Down Counter 388
- Up/Down Counter 389
- Counter Example 390
- 10.5 IEC Math Instructions 391
- Multiply, Divide 392
- Increment, Decrement 394
- 10.6 IEC Move Instructions 396
- Block Move 397
- Move Examples 397
- 10.7 IEC Logic Instructions 398
- Real To Double Integer 406
- Byte To Integer 407
- Conversion Example 408
- S7-200 Specifications 411
- Technical Specifications 413
- Relay Electrical Service Life 415
- Proximity Sensor (Bero) 435
- A.8 Optional Cartridges 438
- A.9 I/O Expansion Cable 439
- A.10 PC/PPI Cable 440
- Error Codes 443
- B.3 Compile Rule Violations 446
- Special Memory (SM) Bits 447
- SMB1: Status Bits 448
- SMB3: Freeport Parity Error 448
- SMB4: Queue Overflow 449
- SMB5: I/O Status 449
- SMB6: CPU ID Register 450
- SMB7: Reserved 450
- SMW22 to SMW26: Scan Times 452
- SMB98 and SMB99 460
- S7-200 Troubleshooting Guide 463
- S7-200 Order Numbers 465
- Execution Times 468
- 100 ms 479
- 6ES7298-8FA20-8BH0-01 503
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