22 • Fieldbus coupler/controller Fieldbus coupler 750-319
3.1.4 Operating system
Following is the configuration of the master activation and the electrical installation of the fieldbus station.
After switching on the supply voltage, the coupler performs a self test of all functions of its devices, the I/O module and the fieldbus interface. Following this the I/O modules and the present configuration is determined, whereby an external not visible list is generated.
In the event of a fault the coupler changes to the "Stop" condition. The "I/O" LED flashes red. After clearing the fault and cycling power, the coupler changes to the "Fieldbus start" status and the "I/O" LED lights up green.
Switching on the supply voltage
Initialization, Determination of the I/O modules
and the configuration,
“I/O” LED is blinking red
Test o.k.? |
No |
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Yes |
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Fieldbus coupler is |
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Stop |
in operating mode |
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red “I/O” LED indicates |
“I/O” LED is shining green |
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blink code |
Fig. 3-5: Operating system 750-319 |
g012920e |
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Modular I/O System
LONWORKS®
Fieldbus coupler/controller |
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Fieldbus coupler 750-319 |
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3.1.5 Data exchange
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With LON, the transmission and exchange of data is made using objects network variables.
A network variable (NV) is a type based variable in the Neuron-C programming language for the realisation of logical communication channels between LON®- nodes. If data is transferred from a node to the network, this is made using the network output variable (nvo), if data is transferred from the network to a node this is made using the network input variable (nvi).
For the exchange of I/O data the coupler provides an assigned value of network input and output variables. This number depends on the selected Neuron- C application (TOPLON® IF or TOPLON® PRIO), respectively on the network interface of the Neuron-C application.
For data access a hardware configuration in WAGO TOPLON® IF and in the RIO (Remote I/O)-function of TOPLON® PRIO will be done.
Thereby the I/O module constellation will be automatically dertermined and entered in the particular plug-in.
Subsequent to this all existing digital and analog inputs and outputs are available for further processing in the software configuration.
More information
Please find a detailled description on Hardand Software configuration handling in the corresponding manual to the plug-in WAGO TOPLON® IF and WAGO TOPLON® PRIO (Item no.: 759-123/000-002 part 4 (IF) respectively part 5 (PRIO)).
If you want futhermore program special own Neuron-C applications, you can use a set of ready functions of the TOPLON®-I/O Library. These functions provide important basic-functions for operation with a controll system, as reading of digital and analog inputs and writing on digital and analog outputs.
More information
You can download the functions of the I/O library for TOPLON® excempt from charges from the Internet under: http://www.wagotoplon.com/html/eng/support/downloads/index.htm
Modular I/O System
LONWORKS®
24 • Fieldbus coupler/controller Fieldbus coupler 750-319
3.1.6 Starting-up LON fieldbus nodes
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The general procedure for starting up a WAGO LON fieldbus node with the |
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buscoupler 750-319 is described step-by-step for TOPLON® IF and for the |
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Remote I/O (RIO) -function of TOPLON® PRIO in the brief instructions |
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WAGO TOPLON® (Quickstart, Item no.: 759-123/000-002 part 7). |
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These should form a guideline for further projects. |
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More information |
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The brief instructions WAGO TOPLON® (Quickstart, |
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Item no.: 759-123/000-002 part 7) can be found in the Internet under: |
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http://www.wagotoplon.com/html/eng/service/manual/index.htm |
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Attention |
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This description is given as an example and is limited to the execution of a |
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local start-up of an individual LON fieldbus node with TOPLON® IF or with |
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the Remote I/O function of TOPLON® PRIO. |
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Modular I/O System
LONWORKS®