User advice and safety instructions
User advice and safety instructions
PROFIBUS manual
Version FELD-V2002.02
Page 3
1.
User advice and safety instructions
5
1.1
Important information
5
1.2
Proper use of the equipment
5
1.3
Notes on equipment configuration and installation
6
1.4
Symbols
6
1.5
Abbreviations
6
2
Technical data
7
3
Installation
8
3.1
Connection of fieldbus lines
8
3.2
Configuring a PROFIBUS DP system
10
3.3
Configuration menu in DIGIFORCE
®
type 9310
10
4
PROFIBUS
11
4.1
Overview
11
4.2
General information
13
4.3
GSD file
13
4.4
Data conversion
14
4.4.1
Description of the data formats in this manual
14
4.4.2
Handling problems that arise when reading floating-point numbers
14
5.
PROFIBUS DP data protocol
15
5.1
Transfer from master to slave
15
5.2
Message structure / Transfer from slave to master
16
5.3
Meaning of the contents of the different protocol modes
17
5.4
Message structure / data break-down
18
5.5
Byte reference list
19
5.5.1
Mode 1 (PLC-Out)
19
5.5.2
Mode 2 (PLC-Out, min. general curve data)
19
5.5.3
Mode 3 (PLC-Out, full general curve data)
20
5.5.4
Mode 4 (PLC-Out, Window 1 E/E)
22
5.5.5
Mode 5 (PLC-Out, Full general curve data, Window 1 E/E)
23
5.5.6
Mode 6 (PLC-Out, Windows 1-2 E/E)
25
5.5.7
Mode 7 (PLC-Out, Full general curve data, Windows 1-2 E/E)
26
5.5.8
Mode 8 (PLC-Out, Windows 1-3 E/E)
28
5.5.9
Mode 9 (PLC-Out, Full general curve data, Windows 1-3 E/E)
30
6.
Glossary
33
7.
Appendix A: Representation of floating-point values
36
8.
Appendix B: Byte sequence of float values
40