Siemens SIMATIC TIWAY 1 Manual do Utilizador descarregar pdf (Página 56)

NIM Primitives

4-3

SIMATIC TIWAY I Series 500 NIM User Manual

4.2 Primitive Functions

Primitives serve as the command structure that a TIWAY I Primary uses to

access (read or write) information in a TIWAY I Secondary. The Primitives

defined in the following paragraphs serve these basic functional needs:

• To access and retrieve data

• To ascertain the status and configuration of attached devices

• To perform control operations on the attached device

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   1
   1
MANUAL PUBLICATION HISTORY 3
LIST OF EFFECTIVE PAGES 4
Contents 5
Chapter 4 NIM Primitives 6
Contents v 7
List of Figures 8
List of Tables 9
TIWAY I Overview 12
1.1 TIWAY I System Overview 13
Network Design Considerations 19
2.4 Local Line Biasing 33
Installation 36
3.1 General Requirements 37
3.2 Installing the NIM 38
3.4 Setting the Dipswitches 41
3.5 Series 500 NIM Self Tests 49
3.6 Module Login Verification 52
4.1 TIWAY I Primitives 55
4.2 Primitive Functions 56
 59
 59
 59
4.4 Primitive Logical Groups 62
** Format 67
2x, 3x, and 4x = IBM format 67
6x, 7x, and 8x = IEEE format 67
 86
 94
(repeated) 96
NIM Primitives 101
      102
 102
Download Examples 111
Primitives 111
PM550 CIM Requirements 118
A.1 Introduction 119
A.2 Local Line Length 120
Floating Point Numbers 123
B.1 Introduction 124
B.2 IBM Format 125
IBM Format (continued) 126
 126
B.3 IEEE Format 127
IEEE Format (continued) 128
Appendix C 129
DATA DEFINITION TABLE 130
Network Evaluation Form 131
Specifications 133
Primitive Examples 134
Customer Response 136
FIRST CLASS 137
PERMIT NO.3 137
JOHNSON CITY, TN 137

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