Siemens SIMATIC FS600 Instrucciones de operaciones descargar pdf (Pagina 9)

Distributed Use of SIMATIC FS600 Laser

Scanner in Category 3 / SIL 2

Entry ID: 21330889

A&D Safety Integrated Page 9/51 AS-FE-I-010-V20-EN

21330889_as_fe_i_010_v20_en_lscanner.doc

2.1.2 Functionality of the safety functional example

The STEP 7 project (hardware configuration and sample code) to the safety

functional example comprises the following components:

• fail-safe S7-CPU (DP master)

• laser scanner SIMATIC FS600 for PROFIBUS (DP slave)

• standard and fail-safe input and output modules of ET 200S (DP slave)

In the safety functional example, a hazardous machine is simulated by an

indicator light (actuator) which is connected to a fail-safe digital output

module (F-DO). The term "machine" will be used to designate the indicator

light (actuator) in the following.

If the active detection zone of the laser scanner SIMATIC FS600 is violated

while the “machine” is switched on, the “machine” will be switched off

automatically (indicator light off). Restarting the “machine” is only possible if

an acknowledgement is given first.

The status of the sensors defines the detection zone numbers (bits 0, 1 and

2 of the cyclic output data). It defines which protection and warning zone is

active. In the safety functional example, either zone pair 1 (detection zone 1

and warning zone 1) or zone pair 2 (detection zone 2 and warning zone 2)

is active. If you want to expand the safety functional example with the aim

to work with three or four zone pairs, you can use the prepared program

sequences of the sample code (further information given in chapter 6).

The sensors for switching the detection zones are directed to a fail-safe

input module of the (F-DI). If this F-DI malfunctions, switching between the

detection zones is not possible anymore. This fault is recognized. As a

response to this fault, the fail-safe output module (F-DO) is set to fail-safe

mode (indicator light switched off).

NOTICE

In order to meet the requirements of category 3 / SIL 2, it is

obligatory for certain actuators (e.g. contactor) to read back the

process signal to the actuator.

Read-back is not implemented in this safety functional example. The

actuator is an indicator light simulating a machine. When using

different actuators, the feedback circuits have to be integrated and

evaluated by the user. Safety functional example 7 provides a

detailed description of “Read back”.

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Siemens SIMATIC FS600 Instrucciones de operaciones Pagina 9