M7RHB2_E.PDF

Table of Contents

C Runtime Library

SIMATIC

Socket Interface

Miscellaneous

System Software

for M7-300 and M7-400

System and Standard

Functions, Volume 2

Index

Reference Manual

This manual is part of the documentation

package with the order number:

6ES7802–0FA14–8BA0

C79000–G7076–C853–02

Safety Guidelines

This manual contains notices which you should observe to ensure your own personal safety, as well as to

protect the product and connected equipment. These notices are highlighted in the manual by a warning

triangle and are marked as follows according to the level of danger:

Danger

indicates that death, severe personal injury or substantial property damage will result if proper precau-

tions are not taken.

Warning

indicates that death, severe personal injury or substantial property damage can result if proper precau-

tions are not taken.

Caution

indicates that minor personal injury or property damage can result if proper precautions are not taken.

Note

draws your attention to particularly important information on the product, handling the product, or to a

particular part of the documentation.

Qualified Personnel

Only qualified personnel should be allowed to install and work on this equipment. Qualified persons are

defined as persons who are authorized to commission, to ground, and to tag circuits, equipment, and sys–

tems in accordance with established safety practices and standards.

Correct Usage

Note the following:

Warning

This device and its components may only be used for the applications described in the catalog or the

technical description, and only in connection with devices or components from other manufacturers which

have been approved or recommended by Siemens.

This product can only function correctly and safetly if it is transported, stored, set up and installed cor-

rectly, and operated and maintained as recommended.

Trademarks

are registered trademarks of SIEMENS AG.

Some of the other designations used in these documents are also registered trademarks; the owner’s

rights may be violated if they are used by third parties for their own purposes.

, SIMATIC HMI

and SIMATIC NET

The reproduction, transmission or use of this document or its contents is not

permitted without express written authority. Offenders will be liable for

damages. All rights, including rights created by patent grant or registration of

a utility model or design, are reserved.

Disclaimer of Liability

We have checked the contents of this manual for agreement with the

hardware and software described. Since deviations cannot be preclu-

ded entirely, we cannot guarantee full agreement. However, the data in

this manual are reviewed regularly and any necessary corrections inclu-

ded in subsequent editions. Suggestions for improvement are welco-

med.

Siemens AG

Automation and Drives Group

Industrial Automation Systems

P.O.Box 4848, D- 90327 Nuremberg

System Software for M7-300 and M7-400, System and Standard Functions, Volume 2

C79000–G7076–C853–02

Siemens AG 1998

Technical data subject to change.

Index-2

Siemens Aktiengesellschaft

C79000–G7076–C853–02

SIMATIC

Table of Contents

C Runtime Library

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1

Socket Library

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Miscellaneous

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-1

Index

System Software for M7-300 and M7-400, System and Standard Functions, Volume 2

C79000–G7076–C853–02

Table of Contents

System Software for M7-300 and M7-400, System and Standard Functions, Volume 2

C79000–G7076–C853–02

C Runtime Library

In this chapter

Call

Brief Description

Page

abort

Terminate task

1-7

abs

Determine the absolute value of an integer number

1-8

access

Check file access

1-9

acos

Arc cosine

1-10

asctime

Convert date and time of the RMOS software clock to

a string

1-11

asin

Arc sine

1-13

assert

Terminate task depending on condition

1-14

atan

Arc tangent

1-15

atan2

Arc tangent of two double numbers

1-16

atexit

Define routines to be executed on completion of a task

1-17

atof

Convert a string to a double-precision number

1-18

atoi

Convert a string to an integer number

1-19

atol

Convert a string to a long integer number

1-20

bsearch

Search for an element in a sorted table

1-21

calloc

Request memory

1-23

ceil

Round up a double-precision number

1-24

changevib

Change volume identification block

1-25

chdir

Change the current working directory (CWD)

1-26

checkpoint

Store temporary buffer of file

1-27

chmod

Change file attributes

1-28

clearerr

Reset the error status of a stream

1-30

clock

Dummy Function

1-31

Close an open file, socket or unit of a loadable driver

1-32

cos

Cosine

1-33

cosh

Hyperbolic cosine

1-34

createvib

Generate new volume identification block

1-35

ctime

Convert date and time to a string

1-36

difftime

Determine the length of a time interval

1-38

dismount

Dismount a device of the HSFS file management sy-

stem

1-39

System Software for M7-300 and M7-400, System and Standard Functions, Volume 2

C79000–G7076–C853–02

1-1

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