Siemens SIMATIC NET Manual de Serviço descarregar pdf (Página 20)

Description of the Architecture

Introduction to PROFIBUS on Industrial PC

C79000-G8976-C068

3.5.4 S7 Programming Interface

SAPI-S7 is the C programming interface for access to the S7

communications protocol on PGs/PCs.

The acronym SAPI-FMS stands for:

•

SAPI -

imple

pplication

rogrammers

nterface

•

S7 layer 7 communications protocol for SIMATIC S7 systems.

SAPI-S7

•

Represents a simple C programming interface,

•

Provides access to the S7 services on PCs and PGs and

•

Is available as a C library and is operated with SIMATIC NET

drivers and SIMATIC NET communications processors.

The SAPI-S7 programming interface has the following advantages:

•

SAPI-S7 is a simple but flexible and powerful interface.

•

The SAPI-S7 programming interface uses asynchronous

procedures.

•

SAPI-S7 handles sequential services such as the active and

passive establishment of an S7 connection.

•

SAPI-S7 supports troubleshooting with an integrated trace function.

•

The SAPI-S7 programming interface is compatible with other SAPI

programming interfaces.

•

The SAPI-S7 programming interface can also be used by other

programs, for example BASIC or Pascal programs.

SAPI-S7

What Does SAPI-S7

Mean?

What Is SAPI-S7?

Advantages of the

SAPI-S7

Programming

Interface

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