Programmable Field Bus Controller 750-833; Description - WAGO I/O SYSTEM 750 750-833 Manual

3 Programmable Field Bus Controller 750-833

3.1 Description

The programmable Field Bus Controller 750-833 combines the
PROFIBUS DP-functionality of the Field Bus Coupler 750-333 with that of a
programmable logic control (PLC). The application program is created with
WAGO-I/O-PRO in accordance with IEC 61131-3. The programmer has
access to all field bus and I/O data.
• Load relief for the central controls using decentral processing units
• Dividing complex applications into individual testable units
• Programmable fault reaction in the case of a field bus system failure
• Load relief of the communication system PROFIBUS DP by signal
• Reduction of reaction times by direct access to the periphery (without
• Stand Alone, smallest scale control (station address 0)
• Use for decentral and central control
• Programmable in accordance with IEC 61131-3 in all 5 languages: IL, LD,
In the initialization phase, the coupler determines the physical structure of the
node and creates the process image of all inputs and outputs on this basis.
In this process, it looks at all of the byte-orientated (complex) terminals from
the point of view of the internal PLC (CPU) and allocates them to the
appropriate process image (input and/or output image) in its order from the
bus controller to the final terminal.
Afterwards, all binary bus terminals are allocated to each process image after
appearing on the node. This takes place continuously in one byte array.
The PROFIBUS process image mirrors the physical arrangement of the bus
terminals. It is also possible to combine terminals with a granularity of 2 or 4
bits into bytes.
The physical structure of the field bus node may be individually adapted to the
configuration of each system without changing the addressing of a global
control application. This is done by parameterizing the modules accordingly
with the aid of the planning environment (for instance, WAGO NETCON,
COM PROFIBUS, STEP7, Profi-Map, etc.).
WAGO-I/O-SYSTEM 750
Bus System
preprocessing
having pass through the field bus system PROFIBUS DP)
FBD, ST and SFC.
Programmable Field Bus Controller 750-833 • 49
Description