Two output test signals are mandatory. Each output OUT TEST can be connected to
only one input S-MAT (it is not allowed parallel connection of 2 inputs).
The function block S-MAT can not be used with 2-wire components and termination
resistance.
Output test: This is used to select which test output signals are to be sent to the s-mat
contact. This additional control permits detection and management of any short-circuits
between the lines. To enable this control, the test output signals must be configured
(amongst those available). Test signals are mandatory.
Test at start-up: If selected this enables the test at start-up of the external component.
This test is performed by pressing and releasing the safety mat 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 external contacts. 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.
Enable Error Out: If selected reports a fault detected by the function block.
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.
SWITCH function block verifies the input status
of a pushbutton or switch (NOT SAFETY
SWITCHES). If the pushbutton is pressed the
output is 1 (TRUE). Otherwise, the output is 0
(FALSE).
Parameters
Manual reset: If selected this enables the request
to reset each time the device is activated.
Otherwise, enabling of the output directly follows
the input conditions.
There are two types of reset: Manual and
Monitored. When Manual is selected the system
only verifies the signal's transition from 0 to 1.
If Monitored is selected the double transition from 0 to 1 and then back to 0 is verified.
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