Eurotherm Drives 590 DRV Digital, Product Manual, Page: 303 / 318

590 DRV Digital DC Drive Product Manual
App. M - 23
Appendix M Special Blocks and Application Notes
M
Tension Feedback
The loadcell tension feedback or dancer position signal is connected to terminal A3, TENSION FEEDBACK. Full ten-
sion should be scaled to be +9 volts to allow 10 percent over range. When a dancer is used, the drive requires a mini-
mum range of three volts.
Line Speed Reference
A line speed reference is required for the diameter calculator to work. It should be scaled to p10 volts at full
speed and connected into terminal A4, LINE SPEED REF. If this signal comes from a source other than a Eurotherm
Drives motor controller, it may need to be scaled and isolated. This signal is connected to parameter SETUP
PARAMETERS::SPECIAL BLOCKS::DIAMETER CALC.::LINE SPEED. If type 5703 Peer-to-Peer Communica-
tions Modules are used, digital line speed signal may be substituted for the 0 - 10 volt analog signal.
Tension Setpoint
The tension setpoint of 0 to +10 volts (scaled internally to 90 percent using parameter ANIN 4 (A5):: CALIBRATION)
is connected to terminal A5, TENSION SP. Typically this signal could come from a potentiometer supplied from the
drive’s +10 volt terminal, B3. This signal is connected to parameter SETUP PARAMETERS::SPECIAL
BLOCKS::TAPER CALC.::TENSION SPT. If the serial communications option is installed, the tension setpoint could
be generated by a PLC, supervisory computer, or 5721 operator station.
Taper Setpoint
A taper setpoint, if required, of 0 to +10 volts should be connected to A6, TAPER SETPOINT. The range of taper can
be set by the MAX VALUE and MIN VALUE for the analog input in the CONFIGURE I/O menu. This signal is con-
nected to parameter SETUP PARAMETERS:: SPECIAL BLOCKS:: TAPER CALC.:: TAPER. If the serial communi-
cations option is installed, the taper setpoint could be generated by a PLC, supervisory computer, or 5721 operator sta-
tion.
Overwind/Underwind
Digital input terminal C6, OVERWIND, selects the winding direction, ON for overwinding and OFF for
underwinding. If only unidirectional winding is required, set the winding direction manually using parameter SETUP
PARAMETERS:: SPECIAL BLOCKS::OVER WIND. Remember to disconnect terminal C6 by changing its
DESTINATION TAG to 0 in the CONFIGURE I/O menu.
Preset Enable
24 VDC at digital input terminal C7, PRESET ENABLE, selects the PRESET ENABLE. When ON, the diameter
memory is preset to the diameter preset input value or minimum diameter as described earlier.
For a simple rewind, the operator can use a pushbutton to reset to core when the full roll is removed and a new roll is
started. For an unwind, the operator presets the new roll diameter using either a potentiometer, a 5570 Ranger ultra-
sonic transducer, or some other diameter input device.
Tension Enable
Digital input C8, TENSION ENABLE, switches the drive from strict speed control to closed-loop, tension regulation
control. This input should be ON when the winder is started and OFF when it is jogged.
Jog
JOG is selected by digital input C4. The jog direction can be selected by terminal C6, OVERWIND.