Siemens SIMATIC NET Manuel de service télécharger pdf (Page 17)

Description of the Architecture

Introduction to PROFIBUS on Industrial PC

C79000-G8976-C068

3.5.2 FMS Programming Interface

The Siemens implementation of the FMS programming interface is

known as SAPI-FMS.

The acronym SAPI-FMS stands for:

•

SAPI -

imple

pplication

rogrammers

nterface

•

FMS -

ieldbus

essage

pecification - the layer 7 communications

protocol of PROFIBUS.

SAPI-FMS

•

represents a simple C programming interface,

•

provides access to the FMS 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-FMS programming interface has the following advantages:

•

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

•

The SAPI-FMS programming interface uses asynchronous

procedures.

•

SAPI-FMS handles sequential services such as the transfer of a

communication relationship list automatically.

•

SAPI-FMS converts variable data automatically into the format of

the local CPU.

•

SAPI-FMS supports troubleshooting with an integrated trace

function.

•

The SAPI-FMS programming interface is compatible with other

SAPI programming interfaces.

•

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

programs, for example BASIC or Pascal programs.

SAPI-FMS

What Does SAPI-

FMS Mean?

What Is SAPI-FMS?

Advantages of the

SAPI-FMS

Programming

Interface

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Siemens SIMATIC NET Manuel de service Page 17

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