Output test: This is used to select which test output signals are to be sent to the
component contacts. 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 at start-up: If selected this enables the test at start-up of the external component.
This test is performed by opening and activating the enable key 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.
With Simultaneity: If selected this activates the test to verify concurrent switching of the
signals coming from the external contacts.
Simultaneity (ms): This is only active if the previous parameter is enabled. It defines the
maximum time (in msecs) between the switching of two different signals from the
external contacts.
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.
ESPE function block verifies an optoelectronic
safety light curtain (or laser scanner) inputs
state. If the area protected by the light curtain
is occupied, (light curtain outputs FALSE) the
output is 0 (FALSE). Otherwise, with the area
clear and outputs to 1 (TRUE) the output is 1
(TRUE).
Parameters
Enable reset: If selected this enables the
request to reset each time the area protected
by the safety light curtain is occupied.
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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