Fieldbus coupler/controller |
• 31 |
Fieldbus controller 750-819 |
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3.2 Fieldbus controller 750-819
This chapter includes:
3.2.1 |
Description...................................................................................... |
32 |
3.2.2 |
Software for the controller .............................................................. |
32 |
3.2.3 |
Hardware......................................................................................... |
33 |
3.2.3.1 |
View ......................................................................................... |
33 |
3.2.3.2 |
Device supply........................................................................... |
34 |
3.2.3.3 |
Fieldbus connection.................................................................. |
34 |
3.2.3.4 |
Display elements ...................................................................... |
35 |
3.2.3.5 |
Configuration and programming interface ............................... |
35 |
3.2.3.6 |
Operating mode switch............................................................. |
36 |
3.2.3.7 |
Hardware address ..................................................................... |
37 |
3.2.4 |
Operating system............................................................................. |
38 |
3.2.4.1 |
Start-up..................................................................................... |
38 |
3.2.4.2 |
PLC cycle ................................................................................. |
39 |
3.2.5 |
Process image.................................................................................. |
41 |
3.2.6 |
Data exchange ................................................................................. |
42 |
3.2.6.1 |
Memory areas ........................................................................... |
43 |
3.2.6.2 |
Addressing................................................................................ |
45 |
3.2.7 |
Starting-up LON fieldbus nodes ..................................................... |
49 |
3.2.8 |
Programming the PFC with WAGO-I/O-PRO 32 .......................... |
49 |
3.2.8.1 |
LON library elements for WAGO-I/O-PRO 32 ....................... |
50 |
3.2.8.2 |
IEC 61131-3 Program transfer ................................................. |
52 |
3.2.9 |
LED display .................................................................................... |
55 |
3.2.9.1 |
Blink code ................................................................................ |
56 |
3.2.9.2 |
Fieldbus status.......................................................................... |
56 |
3.2.9.3 |
Node status ............................................................................... |
57 |
3.2.9.4 |
Fault message via the blink code of the I/O LED .................... |
59 |
3.2.9.5 |
Supply voltage status................................................................ |
60 |
3.2.10 |
Fault behavior ................................................................................. |
60 |
3.2.10.1 |
Fieldbus failure......................................................................... |
60 |
3.2.10.2 |
Internal bus fault....................................................................... |
60 |
3.2.11 |
Technical Data ................................................................................ |
61 |
Modular I/O System
LONWORKS®
32 • Fieldbus coupler/controller Fieldbus controller 750-819
3.2.1 Description
The programmable fieldbus controller 750-806 (short: PFC) combines the LON interface connection with that of a programmable logic control (PLC).
The application program is created with WAGO-I/O-PRO 32 in accordance with IEC 61131-3.
According to the IEC 61131-3 programming, data processing occurs locally in the PFC. The link results created in this manner can be put out directly to the actuators or transmitted to the higher ranking control system via the bus.
The data is transmitted with network variables.
In the initialization phase the fieldbus controller determines the physical structure of the node and creates a process image from this with all inputs and outputs. This could involve a mixed arrangement of analog (word by word data exchange) and digital (byte by byte data exchange) modules.
The local process image is subdivided into an input and output data area.
The data of the analog modules are mapped into the PDOs according to the order of their position downstream of the bus coupler. The bits of the digital modules are compiled to form bytes and also mapped into PDOs. Should the number of digital I/Os exceed 8 bits, the coupler automatically starts another byte.
The programmer has access to all fieldbus and I/O data.
Attention
An application program meeting IEC 61131-3 standards is necessary for the fieldbus controller to operate. The bus module data must be copyed on the PFC variables (fieldbus variables) via the IEC 61131-3 application program, in order to be read.
3.2.2 Software for the controller
PLC applications on the programmable fieldbus controller 750-819 can be achieved with the programming and visualization tool WAGO-I/O-PRO 32 (Item-No.: 759-332/000-001) meeting IEC 61131-3 standards.
The LNS-based Plug-In TOPLON® PRIO (Item-No.: 759-340/000-002) is used to connect the LON network with the programmable fieldbus controller. TOPLON® PRIO is used to link the programming tool WAGO-I/O-PRO 32 and to assign the IEC 61131-3 variables to the network variables.
The abbreviation "PRIO" means "Programmable Remote I/O".
Modular I/O System
LONWORKS®