Siemens SIMATIC FS600 Instrucciones de operaciones descargar pdf (Pagina 43)

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Category 3 / SIL 2

Entry ID: 21330889

A&D Safety Integrated Page 43/51 AS-FE-I-010-V20-EN

21330889_as_fe_i_010_v20_en_lscanner.doc

Network 5 and network 6

A zone pair will always become active in the safety functional example if

the following conditions are met simultaneously:

• the associated position switch (NC) switches (“0“ signal)

• the other position switch (NC) and the memory bits (dummies) all have

the “1“ signal.

During changeover (e.g. from zone pair 1 to zone pair 2) this condition is

not true for a certain duration of time. During this time the zone pair set last

remains active (e.g. zone pair 1). The following figure illustrates this.

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Siemens SIMATIC FS600 Instrucciones de operaciones Pagina 43