120
of 216
6.3.3.2 Trapezoid
You can set the "Trapezoid" graphical evaluation element to be of type "Trapezoid X" or "Trapezoid Y".
The "Trapezoid X" type is specified by fixed vertical X-limits (Xmin, Xmax) and the "Trapezoid Y" type by
fixed horizontal Y-limits (Ymin, Ymax). You can configure up to two trapezoids in one measurement
program, At the end of the measurement phase, the DIGIFORCE
®
9311 outputs an OK/NOK result and
calculates the entry and exit coordinates for each trapezoid.
Unlike a "Window", the measurement curve is only allowed to pass through a "Trapezoid" in one
direction, vertical for the trapezoid of type "Trapezoid X" and horizontal for the trapezoid of type
“Trapezoid Y”.
Diagram 51: Examples of “Trapezoid X”
If the trapezoid is of type "Trapezoid Y", however, then the measurement curve must pass from bottom to
top or top to bottom.
Diagram 52: Examples of “Trapezoid Y”
If the curve passes through the "Trapezoid" concerned in a different direction then this counts as a
violation and is assessed as NOK by the DIGIFORCE
®
9311.
Whatever its orientation, the "Trapezoid" graphical evaluation element outputs the following results data:
Individual evaluation
or
The DIGIFORCE
®
9311 can only output the evaluation result from a single
trapezoid at the Fieldbus interface.
Summary of Contents for DIGIFORCE 9311
Page 3: ...3of 216...