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Transmitting parameter data
Reading a parameter (example)
8
Networking via system bus (CAN)
8.4
8.4.3
L
8.4−5
EDSPM−TXXX−9.0−11/2009
8.4.3 Reading a parameter (example)
An I/O system IP20 has the node address 2. For the first module (4×analog output)
the function of the A.0 output is to be read.
Formula Information
Identifier = Basic identifier + node address
= 1536 + 2 =1538 = 602
h
· Basic identifier for parameter channel 1 (output) = 1536
· Node address of the I/O system IP20 = 2
Instruction
code:
= 40
h
· Command Read Request" (request for reading a
parameter of the I/O system IP20)
Index = I3001
h
· Index first analog module
Subindex = 1 · Subindex = 1 (function for output A.0 among others)
Data 1
Data 2
Data 3
Data 4
Data 1 ... 4
= 00
h
= 00
h
= 00
h
= 00
h
= 00 00 00 00
h
· Read request only
11 bits 8 bytes of user data
Identifier
Instruction
code:
Index
Subindex Data 1 Data 2 Data 3 Data 4
LOW byte HIGH byte
602
h
40
h
01
h
30
h
1 00
h
00
h
00
h
00
h
L
0
1
L
Read Request
Read Response
Identifier = 1538
Identifier = 1410
epm−t119
Fig. 8.4−2 Reading a parameter
Formula Information
Identifier = Basic identifier + node address
= 1408 + 2
= 1410
· Basic identifier for parameter channel 1 (input) = 1408
· Node address of the I/O system IP20 = 2
Instruction
code:
= 43
h
· Command Read Response" (response to the read
request with the current value)
Index = Index of the read request
Subindex = Subindex of the read request
Data 1
Data 2
Data 3
Data 4
Data 1 ... 4
= 00
h
= 00
h
= 05
h
= 3B
h
= 00 00 05 3B
h
· Assumption: Analog output A.0 outputs a voltage signal
0 ... +10 V at a 12 bit resolution.
11 bits 8 bytes of user data
Identifier
Instruction
code:
Index
Subindex Data 1 Data 2 Data 3 Data 4
LOW byte HIGH byte
1410 43
h
01
h
30
h
0 00
h
00
h
05
h
3B
h
(LSB) (MSB)
Task
Telegram to the I/O system IP20
Telegram from the I/O system
IP20 (value of the requested
parameter):
- I/O−System IP20 1
- Contents 10
- 1 Preface 11
- 1.1 The I/O system IP20 13
- How to use this System Manual 16
- Document history 17
- 1.2.3 Document history 17
- 1.3 Legal regulations 19
- Legal regulations 20
- Safety instructions 21
- Technical data 25
- The modular system 100
- The compact system 113
- EPM-T831 1A.10 127
- EPM-T833 1A.10 135
- 02413567 143
- Mechanical installation 147
- Electrical installation 155
- 8.1 Via system bus (CAN) 171
- 8.2 Network management (NMT) 173
- Network management (NMT) 174
- 8.3 Transmitting process data 175
- Transmitting process data 176
- PDO1-TX PDO1-RX 178
- 2. 3. 4 178
- Transmitting parameter data 188
- Telegram structure 188
- Identifier = 1538 190
- Identifier = 1410 190
- 8.6 Node Guarding 195
- Node Guarding 196
- 8.7 Heartbeat 197
- Heartbeat 198
- 8.8 Reset node 199
- 8.9 Monitoring 201
- Monitoring 202
- Digital output monitoring 202
- 8.10 Diagnostics 205
- Diagnostics 206
- Emergency telegram 206
- 8.10.1 Emergency telegram 206
- Status of the digital outputs 208
- Via the index I6401 209
- Via the index I6411 209
- Network via CANopen 211
- Networking via PROFIBUS−DP 255
- Commissioning 283
- 12.1 Important notes 295
- Parameterising analog modules 300
- Parameter data 300
- Diagnostic data 304
- 12.3.2 Diagnostic data 304
- 12.3−11 309
- 12.3−12 310
- 12.3−13 311
- 12.3−16 314
- 12.3−17 315
- 12.3−18 316
- Input data / output data 325
- 2 x 32 bit counter (mode 0) 326
- Encoder (modes 1, 3, and 5) 328
- Counter 0 332
- Counter 1 332
- 12.4−13 333
- 12.4−14 334
- 12.4−15 335
- 12.4−16 336
- 12.4−17 337
- 12.4−18 338
- 12.4−19 339
- 12.4−20 340
- 12.4−21 341
- 12.4−22 342
- 12.4−23 343
- 12.4−24 344
- 12.4−25 345
- 12.4−26 346
- 12.4−27 347
- 12.4−28 348
- 12.4−30 350
- 12.4−31 351
- 12.4−32 352
- 12.4−33 353
- 12.4−34 354
- 12.4−35 355
- 12.4−36 356
- 12.4−37 357
- 12.4−38 358
- 12.4−39 359
- 12.4−40 360
- 12.4−41 361
- 12.4−42 362
- 12.4−43 363
- 12.4−44 364
- 12.4−45 365
- 12.4−46 366
- 12.4−47 367
- 12.4−48 368
- 12.4−49 369
- 12.4−50 370
- 12.4−51 371
- 12.4−52 372
- 12.4−53 373
- 12.4−54 374
- 12.4−55 375
- 12.4−56 376
- Parameterising SSI interface 379
- EDSPM−TXXX−9.0−11/2009 384
- 12.5−11 387
- Encoder (mode 0) 395
- 12.6.3 Encoder (mode 0) 395
- 32 bit counter (mode 1) 397
- 12.6−10 400
- 12.6−11 401
- 12.6−12 402
- 12.6−13 403
- Measuring the period (mode 4) 404
- 12.6−15 405
- 12.8 Loading default setting 409
- · Example: 413
- 13.1−11 423
- 13.1−12 424
- 13.1−14 426
- 13.1−16 428
- 13.1−17 429
- 13.1−18 430
- Gateway Counter 438
- Data to module 438
- Data from module 438
- In3/In6 (DIR) 446
- 13.2−13 447
- 13.2−14 448
- 13.2−15 449
- Counter access 450
- 13.2−17 451
- 13.2−18 452
- 13.2−19 453
- 13.2−20 454
- 13.2−21 455
- 13.2−22 456
- 13.2−23 457
- 13.2−24 458
- 13.2−25 459
- 13.2−26 460
- 13.2−27 461
- 13.2−29 463
- 13.2−30 464
- 13.2−31 465
- 13.2−32 466
- 13.2−33 467
- 13.2−34 468
- 13.2−36 470
- 13.2−37 471
- 13.2−38 472
- 13.2−40 474
- In3/In6 (B) 475
- 13.2−42 476
- 13.2−43 477
- 13.2−44 478
- 13.2−46 480
- 13.2−47 481
- 13.2−48 482
- 13.2−49 483
- 13.2−50 484
- 13.2−52 486
- 13.2−54 488
- 13.2−55 489
- 13.3.1 Parameter data 491
- Gateway SSI-Interface 493
- 13.4.1 Parameter data 495
- Gateway Counter/Dig In 496
- 13.4.3 Encoder (mode 0) 498
- Signal characteristic 503
- 13.4−10 504
- 13.4−11 505
- 13.4−12 506
- 13.4−14 508
- 14.1 Fault messages 511
- Appendix 513
- 10987654321 544
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