DFE SteadyWeb Instruction Manual page 12

1.4 STANDARD FEATURES
SOME OF THESE FUNCTIONS REQUIRE CONFIGURING OR EXTERNAL WIRING. REFER TO
SECTION 5 FOR CONFIGURING AND SECTION 2.2 FOR WIRING.
! 0-10 VOLT DC TENSION OUT. Proportional to web tension. Used as an input to other control
systems, computers or data collection devices.
! 4-20mA TENSION OUT. Proportional to web tension. Used as an input to other control systems,
computers or data collection devices.
! AUTOMATIC CONTROL MODE. The controller output is determined by the difference between
web tension and the AUTO tension set knob position. The internal regulator automatically varies
the output as required to maintain set tension.
! CONTROL VOLTAGE SELECTION. Choose one of three available Control board outputs. They
are 0 to +10 VDC, 0 to -10VDC, and -10 to +10VDC. The 0 to +10VDC output operates pneumatic
(12P) and high voltage (12V) output modules when used. Any of the three outputs can be used in
the 12D version of the SteadyWeb.
! EMERGENCY STOP. Controller immediately goes to full output or zero output (selectable) upon
closure of an external contact. Normally full output is used on unwinds to stop the roll of material
quickly. Zero output is used for rewind or intermediate controllers.
! MANUAL CONTROL MODE. The controller output is determined only by the position of the
MANUAL set knob. No change occurs unless the knob is turned. Used during machine set-up or
during trouble-shooting.
! METER CORRELATION ADJUSTMENT. This causes the position of the AUTO set pot. to
correspond to the position of the needle on the analog tension meter. For example; if the AUTO
pot. is set at 4 on its dial, the tension meter would read 40% of full scale. This is important for the
proper operation of the controller.
! METER DAMPING. Eliminates vibration of the analog tension meter needle. Also minimizes flicker
of the optional digital meter.
! OUTPUT DIRECTION. Select between Normal and Reverse output. Most applications use the
Normal selection, controller output goes up when tension falls below the set level. The Reverse
selection causes output to go down when tension falls below the set level. It is used in intermediate
tension zones where the transducers are located after the nip rolls they control, and for driven
unwinds.
! OUTPUT METER. Displays the controller output, measured in 0 to 100 percent. Set 0 at left end
of scale for Version 12P, 12V and some 12D controllers. Or Set 0 at center of scale when using an
optional center-zero meter for Version 12D controllers having -10 to +10 volt outputs.
! POWER VOLTAGE SELECTION. The SteadyWeb controller is designed to operate on two ranges
of AC power; 110-120 Volts 60/50 Hz, and 220-240 Volts 60/50 Hz. A slide switch on the Power
board selects between the two.
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