eloProg - Vers. 1.0
64
TWO-HAND safety control
The TWO HAND function block verifies the status of
the inputs of a two hand control switch. Only if both
press-buttons are pressed within 500 msec the
output is 1 (TRUE). Otherwise the output is 0
(FALSE).
Input type
:
-
Double INPUT – Allows connection of two-hand
switch with one NO contact for each button.
-
Quadruple selector - Allows connection of two-
hand switch with two NO contact for each button.
Output test
: This is used to select which test output signals are to be sent to the component
contacts. This additional test makes it possible to detect and manage any short-circuits between
the lines. There is a choice of 4 possible test output signals, Test Output 1 - Test Output 4.
Test at start-up
: If selected this enables the test at start-up of the external component. This test is
performed by pressing the two buttons (within 500 msec) and releasing them to run a complete
function test and enable the output. This test is only requested at machine start-up (when the unit
is switched on).
Filter (ms)
: This is used to filter the signals coming from the mode selector. The filter can be
configured to between 3 and 250 ms and eliminates any bouncing on the contacts. The length of
the filter affects the calculation of the unit's total response time.
Item description
: This allows a description of the component's function to be entered. The text is
displayed in the top part of the symbol.
