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5 Extending the Safety Program – Application Examples
In the following sections the safety program created in chapter 4 is extended by
application examples for preset execution and error analysis.
However, the examples are not customer-specific solutions, but are only intended as
an aid for different automation tasks.
The function blocks presented should facilitate the integration of the measuring
system into an application.
In the following application example
● Preset execution
the error states are output by the function block presented here. The associated error
handling is not included in the examples and must be implemented by the user.
Conditions of use for software examples in chapter 2.4 must be observed!
5.1 Preset execution
The preset block for execution of the preset adjustment function sets the current
safety position of the measuring system to any new value within its measuring range.
The preset block indicates whether the preset adjustment function could be executed
via the ERROR and VALID bits. The preset adjustment function can only be executed
as long as no passivation of the measuring system is present. If the preset adjustment
function already was executed for the adjustment of a safety-related-position, for the
rest of the safety-related-positions the preset adjustment function is blocked. At the
same time only one preset instance can be execute. Via the status bit READY it is
displayed if the preset adjustment function can be executed or not. Also see chap.: 6.4
"Measuring system - Passivation and user acknowledgment" on page 143.
The preset block does not carry out a check of the new position. This must be
implemented by the user!
Printed in the Federal Republic of Germany
12/17/2020
TR - ECE - TI - DGB - 0340 - 01
TR-Electronic GmbH 2019, All Rights Reserved
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