GE Industrial Solutions DV-300 DC Drive Users Manual - Manual (Page 324)

GEI-100332Ga
——— FUNCTION DESCRIPTION ———
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Automatic switching
This sequence carries out an automatic switching between two coils during a winding/unwinding period.
Diam calc Dis
Spd match compl
(digital output)
Diam reset
Torque winder En
Speed match
Start (drive)
Figure 6.17.10: Automatic switching between two coils during a winding/unwinding period
a) Commands referring to the old coil:
During the star rotation phase it is advisable to disable the diameter calculation of the coil functioning as
Diam calc dis = 1 in order to avoid errors in the diameter calculation.
b) Commands referring to the new coil:
Initialize the diameter value as stated above.
Enable the command Speed match, Torque winder en and give the start command to the drive. The motor
will increase the coil speed till a peripheral speed has been reached which corresponds to the line speed for
Spd match gain with the ramp set to Spd match acc. After reaching such speed, the drive indicates the end
of the launching phase with the parameter Spd match compl.
Disable the command Spd match simultaneously to the switching between the two coils.
Enable the diameter calculation: Diam calc dis = 0.
Reel stop
This sequence is used to stop the ended reel after carrying out the automatic switching.
Disabled the diameter calculation Diam calc Dis = 1 and Start command. The reel will decrease up to zero
speed with the time set on Spd match dec .
At speed = 0 disabled Torque winder en.