S-MAT (switch mat)
Using the S-MAT function block the status of
the inputs for a switch mat is checked. If the
there is a person on the footmat, the OUTPUT
output is "0" (FALSE), otherwise, i.e. if the
footmat is clear, the OUTPUT output is "1"
(TRUE).
Parameters
Manual Reset: If selected, a reset can be re-
quested on every activation of the switch mat.
Otherwise the activation of the output will cor-
respond directly to the input conditions.
There are two types of reset: "Manual" and
"Monitored". On the selection of the manual
reset, the system only checks the signal transi-
tion from 0 to 1. With the monitored reset the
double transition from 0 to 1 and then back to
0 is checked.
If Manual Reset is selected, the next Input must be used. Example: If Input1 and In-
put2 are used for the function block, Input3 must be used for the reset input.
The usage of two test outputs is obligatory. Each OUT TEST output can only be con-
nected to one S-MAT input (it is not allowed to connect two inputs in parallel).
The S-MAT function block cannot be used for two-wire components or terminating
resistors.
Output Test: Using this option you can select which test output signals are to be sent to
the S-MAT contact. Short circuits between the wires can be detected and rectified by
means of this additional check. For this purpose it is necessary to configure the test out-
put signals (from the test output signals available). The test signals are obligatory.
StartUp Test: If selected, the test is undertaken on switching on the external components.
This test is undertaken by standing on and clearing the switch mat to carry out one com-
plete function test and to activate the output. This test is only requested on starting the
machine (on switching on the module).
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