Cleveland Motion Controls Quantum Tension Controller REV A - Manual (Page 33)

Menu OUTPUTS
6.4 ALARM management function
Principle
Two digital outputs have been designed to provide two different alarm signals:
Regulation fault: When the Measurement - Set point difference is over the pre-set tolerance, it
means that there is something wrong in the process.
Min. Diameter: Diameter measurement threshold available to alert the operator before the real end
of the bobbin.
How does it work
Error range parameter: The digital output AL1 will be closed for an actual Measurement - Set
point difference higher than the chosen percentage.
Diam Threshold parameter: The digital output AL2 will be closed for an actual Diameter
measurement below the chosen percentage of full scale diameter.
Example
Error range:
For a 5 kg set point and 10 % Error range, the AL1 output will be closed for a measurement out of
the 4.5 to 5.5 kg range ( +/- 10 % of the current set point)
Diam Threshold :
Diameter range = 0.2 to 1.0 m
Actual working range = 1.0 - 0.2 = 0.8 m
For 5 % Diam threshold, the AL2 output will be closed as soon as the actual diameter is lower
than 0.24 m
Alarm diameter = core diameter + (Actual working range x Diameter threshold) 0.2 + (0.8 x 5%)
= 0.24m
Process
AL1 and / or AL2 digital outputs remain closed until the time that the related measurements are
out of the correct range.
CAUTION: AL1 and AL2 are driven by optocoupling components. The common (0 V) point for both
is AL-
Max output capability: Vceo = 300 V
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