Echelon LonTal Stack - Manual (Page 182)

170 Appendix C: Appendix C
Neuron C Syntax for the
Model File
The Network Variable Initializer
initial-value
or
initializer-list
Specifies an initial value (or values) for the network
variable. All network variables, especially input network
variables, should be initialized to a reasonable default
value.
The initial value should be chosen such that if a device is reset, the initial value
can be used for subsequent calculations prior to the variable’s being updated from
the network, and these calculations will not cause the device to create a
hazardous condition or to create an error condition. Initializers should not be
propagated over the network, regardless of whether the network variables are
declared input or output. See Network Variable and Configuration Property
Declarations for more information about initializers.
Example:
network input SNVT_temp nv_temp = 2960; // 23 C, 73.4 F
The Network Variable Property List
A network variable property list declares instances of configuration properties
defined by CP family declarations and configuration network variable
declarations that apply to a network variable.
The syntax for the nv-property-list specification is:
nv_properties { property-reference-list }
property-reference-list :
property-reference-list , property-reference
property-reference
property-reference :
property-identifier [ = initializer ] [ range-mod ]
property-identifier [ range-mod ] [ = initializer ]
range-mod : range_mod_string ( concatenated-string-constant )
property-identifier : [ property-modifier ] identifier [ constant-expression ]
[ property-modifier ] identifier
property-modifier : static | global
The network variable property list begins with the nv_properties keyword. It
then contains a list of property references, separated by commas, exactly like the
device property list and functional block property lists. Each property reference
must be the name of a previously declared CP family or the name of a previously
declared configuration network variable. The rest of the syntax is very similar to
the device property list and functional block property list syntax.
Following the property-identifier, there can be an optional initializer, and an
optional range-mod.
You cannot have more than one configuration property of any given SCPT or
UCPT type that applies to the same network variable.