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SIMATIC Instructions
9-26
S7-200 Programmable Controller System Manual
C79000-G7076-C233-01
I4.0
Up
LD I4.0 //Count Up Input
LD I3.0 //Count Down Input
LD I2.0 //Reset Input
CTUD C48, 4
Timing Diagram
LAD
STL
I3.0
Down
I4.0
C48
I3.0
4
I2.0
CTUD
CU
R
CD
PV
I2.0
Reset
0
1
2
3
4
5
4
3
4
5
0
C48
(current)
C48
(bit)
C48
CTUD
CU
R
CD
PV
4
I4.0
I3.0
I2.0
FBD
Figure 9-9 Example of CTUD Counter Instruction for LAD, FBD, and STL
- 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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