Rockwell Automation WebPak 3000 DC Drive Application Workbook Version 1.1 - Manual (Page 54)

9-4 WebPak 3000 DC Drive Application Workbook, Verson 1.1
The linear function is based on the equation:
Taper Percent = (Instantaneous Roll Dia. – Empty Core Dia.) / (Full Roll Dia. – Empty Core Dia.)
HYPERBOLIC - Provides a taper profile decreasing from core to full roll based
on the equation:
Taper Percent = (1- Empty Core Dia. / Instantaneous Roll Dia.) / (1 – Empty Core Dia. / Full Roll Dia.)
TAPER REGISTER - Provides the capability to generate the taper curve external
to the WebPak 3000 drive and input the curve over the network interface.
TENSION DEMAND (P.844) is the composite outer control loop reference as modified by
the taper function.
9.2 Dancer Loading
When the outer control loop is configured for position control, the pneumatic loading of
the dancer can be electrically programmed by a voltage/current-to-pneumatic
transducer. See Appendix A in this manual for more information.
DANCER LOADING (P.820) is the rate-limited and scaled value of TENSION DEMAND
(P.844).
þ
To configure dancer loading:
▲
Set DANCER ACCEL TIME (P.873) to specify the minimum time in which the
dancer loading output (P.820) can change from MIN DANCER LOAD (P.832) to
MAX DANCER LOAD (P.831).
▲
Set DANCER DECEL TIME (P.819) to specify the maximum time in which the
dancer loading output (P.820) can change from MAX DANCER LOAD (P.831) to
MIN DANCER LOAD (P.832).
▲
Set MAX DANCER LOAD (P.831) and MIN DANCER LOAD (P.832) to specify the
operating range of the dancer consistent with maximum and minimum tension
and with the electro-pneumatic characteristics of the transducer. Note that
MAX DANCER LOAD (P.831) must be greater than MIN DANCER LOAD (P.832) .
▲
Set ANLG OUT 3 SELECT (P.418) to DANCER LOADING (P.820).
Range: LINEAR , HYPERBOLIC , TAPER REGISTER P.863 =
Range: 0.1 to 60.0 SECONDS P.873 = SECONDS
Range: 0.1 to 60.0 SECONDS P.819 = SECONDS
Range: -4095 to 4095 COUNTS P.831 = COUNTS
Range: -4095 to 4095 COUNTS P.832 = COUNTS
Range: SEE SOFTWARE MANUAL (D2-3444) P.418 =
'$1&(5
/2$',1*