gefran TPD32-EV-...-4B - Page 10

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6.16.2 Option 2 ...................................................................................................................................................................... 281
6.16.3 PID Function ............................................................................................................................................................... 283
6.16.3.1 General................................................................................................................................................................................. 284
6.16.3.2 Inputs / Outputs .................................................................................................................................................................... 284
6.16.3.3 Feed - Forward ..................................................................................................................................................................... 285
Figure 6.16.3.1: Feed-forward block description ............................................................................................................................................... 285
6.16.3.4 PID function ......................................................................................................................................................................... 287
Figure 6.16.3.2: PID blocks description ............................................................................................................................................................. 287
6.16.3.5 Proportional - integral block.................................................................................................................................................. 289
Figure 6.16.3.3: PI block description ................................................................................................................................................................. 289
6.16.3.6 Proportional - Derivative control block.................................................................................................................................. 293
Figure 6.16.3.4: PD block description ............................................................................................................................................................... 293
6.16.3.7 Output reference .................................................................................................................................................................. 295
Figure 6.16.3.5: Output reference block description .......................................................................................................................................... 295
6.16.3.8 Function of calculation for Initial diameter ........................................................................................................................... 297
Figure 6.16.3.6: Diameter calculation block description ................................................................................................................................... 297
Figure 6.16.3.7: Diameter calculation ................................................................................................................................................................ 298
6.16.3.9 Procedure of calculation for initial diameter ......................................................................................................................... 299
6.16.3.10 Examples of application ..................................................................................................................................................... 300
Figure 6.16.3.8: Nip-roll control with dancer ..................................................................................................................................................... 300
Figure 6.16.3.9: Nip-rolls control with load cell ................................................................................................................................................. 303
Figure 6.16.3.10: Winder/Unwinder control with dancer ................................................................................................................................... 306
Figure 6.16.3.11: Diameter calculation .............................................................................................................................................................. 310
Figure 6.16.3.12: Winder/unwinder control with sensor diameter ..................................................................................................................... 311
Figure 6.16.3.13: Relation between transducer signal and coil signal ............................................................................................................... 311
Figure 6.16.3.14: Pressure control for pumps and extruder .............................................................................................................................. 313
6.16.3.11 Generic PID ........................................................................................................................................................................ 316
6.16.3.12 Application note ................................................................................................................................................................. 318
Figure 6.16.3.15: Example with small and large diameter ................................................................................................................................. 318
Figure 6.16.3.16: Relation between PI I gain PID and PI I output PID ............................................................................................................... 319
Figure 6.16.3.17: General description of the PID blocks .................................................................................................................................... 320
6.17 TORQUE WINDER FUNCTION ......................................................................................................... 321
6.17.1 Diameter calculation ................................................................................................................................................... 322
6.17.2 Torque calculation ......................................................................................................................................................326
6.17.2.1 Compensations and closing of the tension loop ................................................................................................................... 327
Figure 6.17.1: Acceleration and deceleration indication ................................................................................................................................... 328
6.17.2.2 Taper function ....................................................................................................................................................................... 330
Figure 6.17.2: Relation among the Taper function parameters.......................................................................................................................... 330
6.17.3 Calculation of the speed reference ............................................................................................................................. 331
Figure 6.17.3: Operative sequence of the functioning status ............................................................................................................................. 333
Figure 6.17.4: Functioning with Jog TW enable ................................................................................................................................................ 335
6.17.4 Typical connection diagrams ......................................................................................................................................336
Figure 6.17.5: Winder with an automatic switch and a closed loop tension regulation ..................................................................................... 336
Figure 6.17.6: Winder with an automatic switch and a closed loop tension regulation ..................................................................................... 337
Figure 6.17.7: Winder with an automatic switch and a closed loop tension regulation ..................................................................................... 338
Figure 6.17.8: Winder with an automatic switch and a closed loop tension regulation ..................................................................................... 339
6.17.5 Control logic ...............................................................................................................................................................340
Diameter initialization ......................................................................................................................................................................... 340
Initial phase ........................................................................................................................................................................................ 340
Figure 6.17.9: Initial phase with a stopped line ................................................................................................................................................. 340
Automatic switching............................................................................................................................................................................ 341
Figure 6.17.10: Automatic switching between two coils during a winding/unwinding period ........................................................................... 341
Reel stop ............................................................................................................................................................................................ 341
Figure 6.17.11: Coil stop after the automatic switching .................................................................................................................................... 342
Jog function ........................................................................................................................................................................................ 342
Figure 6.17.12: Jog function to prepare the machine ........................................................................................................................................ 342
6.17.6 Application example ...................................................................................................................................................343
Provisions ........................................................................................................................................................................................... 353