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Content List. Function Overview and Split Overriding Control and Reference Generation Automatic Slow Down Strip Positioning (Head and Tail End) Reference Generation for Processing Lines Looper Positioning Main Commissioning Steps HSI example. Home. Drive. Overriding Control. e.g. BRI.

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Content List

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  1. Content List • Function Overview and Split • Overriding Control and Reference Generation • Automatic Slow Down • Strip Positioning (Head and Tail End) • Reference Generation for Processing Lines • Looper Positioning • Main Commissioning Steps • HSI example Home

  2. Drive Overriding Control e.g. BRI Torque Limits Commands Interlockings Release & S R Logic  Load Share Control Auxiliary and main speed reference Velocity reference M - Set- points Loss + Acceleration torque Acceleration reference Function Overview and Split

  3. Function Overview and Split Home

  4. Overriding control & Reference generation function Main function: • Overriding control and interlocking • Automatic sequences for threading and unthreading • Automatic slow down at pay off reel strip tail end • Strip / Weak point tracking and strip positioning • Operation mode selection • Velocity speed and dv/dt reference generation Home

  5. Overview Automatic Slow Down

  6. Characteristic Automatic Slow Down at pay off reel • Feature: • Automatic slow down to crawl speed/stop at defined remaining strip length • Slow down is a function of the remaining strip length at the pay off reel and the deceleration time of the reference generation function. • Remaining strip length =f (diameter, mandrel diameter, strip thickness)Braking distance =f (line speed, crawl speed, slope, S-time)

  7. Accuracy in a reversing mill Home

  8. Overview Strip Positioning (Head and Tail End)

  9. Characteristic Strip head or tail end positioning • Feature: • Slow down to crawl speed/stop at defined strip head or tail end position • Slow down is a function of the strip position and the deceleration slope • Remaining distance =f (reference position, actual position)Braking distance =f (line speed, crawl speed, slope)

  10. Feature: • The function calculates a velocity reference for strip positioning • For complete positioning the function switches from square-root calculation to linear calculation • V = Vsqrt = dS * 2 * a for dS distance x1 • V = Vlin = dS * b for dS <distance x1 Characteristic Strip head or tail end positioning Home

  11. Reference Generation for Processing Lines • Generation of the reference value for velocity and dv/dt for the drives at the entry-, process- and exit section by using a S-phase function generator • The function includes: • Several velocity values can be predefined by the user • Internal interlocking of the operation modes • Inputs for signals from automatic slow down and positioning • Inputs for signals from looper positioning • Group jogging operation

  12. Reference Generation for Processing Lines

  13. Typical characteristic Home

  14. Looper positioning Feature: • The looper positioning control function takes care of the actual position of the looper and the braking distance. • The function outputs a braking signal for the entry or exit and process reference generation function, so that the looper can reach the reference positions. Also signals for fast stop or emergency stop are created, if the looper reaches defined positions. • Braking distance = f (speed entry or exit, speed process, slope, S-time, strip cords) • Slow down can be done in two steps:Kind of slow down to "looper crawl" and "looper stop"

  15. Looper positioning Characteristic to slow down the entry or exit to process speed: Characteristic to slow down the process to entry or exit speed:

  16. Looper positioning Feature: • The looper in positioning control function takes care of a different actual line velocity speed between process and entry or exit section.The function outputs a velocity reference value for the entry or exit reference generation function to move the looper back into the reference position. • The function takes also care about "Positioning wobbeln”This function is used to protect DC motors in the situation • looper speed equal zero but • line speed not equal zero and • operation tension released. The function changes the reference position.First step: Ref. position = Setpoint ± wobbel distanceSecond step: Ref. position = Setpoint (and so on)

  17. Looper positioning Characteristic of the entry looper for the different phases (normal positioning, in positioning control, slow down entry, process): Characteristic of the exit looper for the different phases (normal positioning, in positioning control, slow down exit, process):

  18. Looper positioning Characteristic of the entry looper if reference positioning changes to a smaller value: Characteristic of the exit looper if reference positioning changes to a smaller value: Home

  19. Main Commissioning Steps 1. I/O, bus signals and parameter check. 2. Basic drive commissioning (current / DTC control, filed controller etc.). 3. Speed controller uncoupled. 4. Speed controller coupled 5. Test jogging forward / backward. 6. Measuring and compensation of no load losses. 7. Measuring and compensation of inertia. 8. Run from overriding control (Rolling operation) without material to check if all drives follow synchronous. 9. Run from overriding control (Rolling operation) with material. Home

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