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Details of the tension control
(3)
Initial winding diameter measurement (X91 signal, Y51 signal)
When resuming a winding operation with a medium-size-roll (not a bare roll) after a pause, the actual winding diameter is
different from what is recognized by the inverter. The initial winding diameter must be set. For such a case, perform the
initial winding diameter measurement with an external contact signal.
Measured winding diameter input signal (X91)
To use the measured winding diameter input signal, set "91" in any of Pr. 180 to Pr. 189 (input terminal function selection).
Winding diameter calculation completion signal (Y51)
The winding diameter calculation completion signal turns ON when the winding measurement started by the ON of the
measured winding diameter input signal is completed.
After the winding diameter calculation completion signal turns ON, turn OFF the measured winding diameter input signal.
To use the measured winding diameter calculation completion signal, set "51" in any of Pr. 190 to Pr. 196 (output terminal
function selection).
Winding diameter hold
Start command
(Input signal)
X91 (measured winding
diameter input)
(Input signal)
Winding diameter calculation
Y51 (winding diameter calculation completion)
(Output signal)
60
Line speed [m/min]
Pr.797(winding diameter calculation start speed)
Winding diameter
measurement
Normal winding
Winding diameter hold
diameter calculation
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