52 •
Fieldbus coupler/controller
Fieldbus coupler 750-319
L
ON
W
ORKS
®
3.1.5 Data exchange
With LON, the transmission and exchange of data is made using objects net-
work variables.
A network variable (NV) is a type based variable in the
Neuron-C
program-
ming 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 net-
work 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 net-
work input and output variables. This number depends on the selected Neu-
ron-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 avail-
able for further processing in the software configuration.
i
More information
Please find a detailled description on Hard- and Software configuration han-
dling 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 pro-
vide important basic-functions for operation with a controll system, as reading
of digital and analog inputs and writing on digital and analog outputs.
i
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