Safety Application Examples; Overview - ABB AC500-S Safety User Manual

Safety application examples

Overview

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7 Safety application examples
7.1 Overview
In this chapter, application examples based on PLCopen Safety POUs are presented with the
main goal to give an explanation on how PLCopen Safety POUs can be used in typical safety
applications. Examples are used from
Initialization procedures for handling PROFIsafe start-up behavior and AC500-S specific POUs
are not listed in these examples, but have to be included in the final safety application pro-
grams.
As an example of the usage of safety functions, the following production line is used. The
PLCopen FBs described below can be used to easily realize the safety application program for
this production line.
Fig. 126: Example of safety functionalities in a production line
1 Centralized control cabinet, including the safety
related part of the control system where the safety
related function blocks are running.
2 Infeed of material. In this part, no special safety
related functions are used. However, safety func-
tionalities like muting to separate between products
and persons could be used.
3 Cutting of the material. For manual control, a two
hand control safety function (unit is in front of the
machine) is added combined with a 2-fold door
monitoring system (attached to the door on the
machine)
4 Automatic printing station, with door monitoring as
safety function in case of service access (attached
to the door on the machine)
5 First cartoning machine with door monitoring as
safety function in case of service access (attached
to the door on the machine). Sometimes, the
manual operation is necessary. In this case, the
operator can run the machine with a safely limited
speed controlled by an enabling device which, when
released, initiates a safe stop.
In addition, every station is equipped with an emergency stop.
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Ä [7] with a permission from PLCopen organization.
6 Second cartoning machine, guarded by an electro-
sensitive protective equipment, ESPE. In this case,
it is a light curtain.
7 Palletizing function, guarded by safety mats. This
functionality could be coupled to the ESPE safety
function.
8 Foil wrapping station of the palletized products with
an exit of the production line. This area is safe-
guarded by several combined light beams, coupled
to the ESPE safety function.
3ADR025091M0208, 12, en_US 2020/06/19