750-342 ETHERNET TCP/IP Modular I/O-System Manual
This manual describes the fieldbus coupler for ETHERNET 10/100 MBit/s of the WAGO-I/O-SYSTEM 750.
System Description:
The WAGO-I/O-SYSTEM 750 is a modular, fieldbus independent I/O system. It is comprised of a fieldbus coupler/controller (1) and connected fieldbus modules (2) for any type of signal. Together, these make up the fieldbus node. The end module (3) completes the node.
Couplers/controllers for fieldbus systems such as PROFIBUS, INTERBUS, ETHERNET TCP/IP, CAN (CANopen, DeviceNet, CAL), MODBUS, LON and others are available.
The coupler/controller contains the fieldbus interface, electronics and a power supply terminal. The fieldbus interface forms the physical interface to the relevant fieldbus. The electronics process the data of the bus modules and make it available for the fieldbus communication. The 24 V system supply and the 24 V field supply are fed in via the integrated power supply terminal. The fieldbus coupler communicates via the relevant fieldbus. The programmable fieldbus controller (PFC) enables the implementation of additional PLC functions. Programming is done with the WAGO-I/O-PRO 32 in accordance with IEC 61131-3.
Bus modules for diverse digital and analog I/O functions as well as special functions can be connected to the coupler/controller. The communication between the coupler/controller and the bus modules is carried out via an internal bus.
The WAGO-I/O-SYSTEM 750 has a clear port level with LEDs for status indication, insertable mini WSB markers and pullout group marker carriers. The 3-wire technology supplemented by a ground wire connection allows for direct sensor/actuator wiring.
Fieldbus coupler 750-342:
Description:
The fieldbus coupler 750-342 displays the peripheral data of all I/O modules in the WAGO-I/O-SYSTEM 750 on ETHERNET.
All sensor input signals are grouped in the coupler (slave) and transferred to the higher ranking controls (master) via the fieldbus. Process data linking is performed in the higher ranking controls. The controls put out the resulting data to the actuators via the bus and the node.
To be able to transmit process data via ETHERNET, the coupler supports a series of network protocols. Process data are exchanged with the aid of the MODBUS/TCP protocol.
Once the ETHERNET TCP/IP fieldbus coupler is connected, the coupler detects all I/O modules connected to the node and creates a local process image on this basis, which can be a mixed arrangement of analog (word-by-word data exchange) and digital (bit-by-bit data exchange) modules.
The local process image is subdivided into an input and an output data area.
The data of the analog modules are mapped into the process image in the order of their position downstream of the bus coupler.
The bits of the digital modules are grouped into words and also mapped into the process image as soon as mapping of the analog modules is completed. When the number of digital I/O’s exceeds 16 bits, the coupler automatically starts the next word.
Also note that all process images start at WORD 0.
Information on configuration, status and the I/O data of the fieldbus node are stored in the fieldbus coupler as HTML pages. These pages can be seen via a standard WEB browser by typing the IP address, that you assigned the coupler, into the Address field of your web browser.
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