Echelon LonTal Stack - Manual (Page 176)

164 Appendix C: Appendix C
Neuron C Syntax for the
Model File
network output SNVT_amp nvoAmpere;
network output polled SNVT_time_stamp nvoInstallDate;
fblock SFPTopenLoopSensor {
nvoAmpere implements nvoValue;
nvoInstallDate implementation_specific(128)
nvoInstall;
} fbAmpereMeter external_name("AmpereMeter")
fb_properties
{
cpDefaultOutput, // optional CP
cpDisplayBrightness = {50.0, 1} // impl-specific
};
Network Variable Syntax
The syntax for declaring a single network variable object is:
network input | output [ netvar-modifier ] [ storage-class ] type
[
connection-info ] identifier
[ = initial-value ] [ nv-property-list ] ;
The syntax for declaring an array of network variables is:
network input | output [ netvar-modifier ] [ storage-class ] type
[
connection-info ] identifier [ array-bound ]
[ = initializer-list ] [ nv-property-list ] ;
The brackets around array-bound are shown in bold type. The brackets do not,
in this case, indicate an optional field. They are a required part of the syntax for
declaring an array, and must be entered into the program code.
Network variable arrays can only be single dimension. The array-bound must be
a constant. Each element of the array is treated as a separate network variable
for purposes of events, transmissions on the network, and so on. Therefore, each
element counts individually towards the maximum number of network variables
on a given device. Each element of the array is a separately bindable network
variable.
Keywords
network
Declares a network variable of a specific type and with a specific identifier.
input | output
Defines the direction (input or output) for the network variable, from the
point of view of the Echelon Smart Transceiver or Neuron Chip.
The Network Variable Modifier
The optional netvar-modifier specification for a network variable includes the
following keywords: