Fieldbus coupler /controller • 47
Fieldbus controller 750-842
Modular I/O System
ETHERNET TCP/IP
3.2 Fieldbus controller 750-842
This chapter includes:
3.2.1
Description ..................................................................................... 48
3.2.2
Hardware ........................................................................................ 49
1.1.1.1
View......................................................................................... 49
1.1.1.2
Device supply .......................................................................... 50
1.1.1.3
Fieldbus connection ................................................................. 51
1.1.1.4
Display elements...................................................................... 51
1.1.1.5
Configuration and programming interface............................... 52
1.1.1.6
Operating mode switch ............................................................ 52
1.1.1.7
Hardware address (MAC-ID) .................................................. 53
3.2.3
Operating system ............................................................................ 54
1.1.1.8
Start-up .................................................................................... 54
1.1.1.9
PLC cycle................................................................................. 54
3.2.4
Process image ................................................................................. 56
1.1.1.10
Example of a process input image ........................................... 57
1.1.1.11
Example of a process output image ......................................... 58
1.1.1.12
Process data architecture for MODBUS/TCP ......................... 59
3.2.5
Data exchange................................................................................. 65
1.1.1.13
Memory areas .......................................................................... 66
1.1.1.14
Addressing ............................................................................... 67
1.1.1.15
Data exchange between master and I/O modules .................... 70
1.1.1.16
Data exchange between PLC functionality (CPU) and I/O
modules.................................................................................... 71
1.1.1.1
Data exchange between master and PLC functionality (CPU) 72
1.1.1.17
Common access of MODBUS master and PLC functionality to
outputs ..................................................................................... 73
3.2.6
Starting up ETHERNET TCP/IP fieldbus nodes............................ 75
1.1.1.18
Note the MAC-ID and establish the fieldbus node.................. 75
1.1.1.19
Connecting PC and fieldbus node............................................ 75
1.1.1.20
Determining IP addresses ........................................................ 76
1.1.1.21
Allocating the IP address to the fieldbus node ........................ 76
1.1.1.22
Testing the function of the fieldbus node ................................ 79
1.1.1.23
Viewing the HTML pages ....................................................... 80
3.2.7
Programming the PFC with WAGO-I/O-PRO 32 .......................... 82
1.1.1.24
WAGO-I/O-PRO 32 library elements for ETHERNET .......... 82
1.1.1.25
IEC 61131-3-Program transfer ................................................ 84
3.2.8
LED Display ................................................................................... 87
1.1.1.26
Blink code................................................................................ 87
1.1.1.27
Fieldbus status ......................................................................... 88
1.1.1.28
Node status............................................................................... 88
1.1.1.29
Fault message via blink code from the I/O-LED ..................... 90
1.1.1.30
Supply voltage status ............................................................... 91
3.2.9
Fault behavior ................................................................................. 92
1.1.1.31
Fieldbus failure ........................................................................ 92
1.1.1.32
Internal bus fault ...................................................................... 92
3.2.10
Technical Data................................................................................ 93