Echelon Neuron C - Manual (Page 185)

Neuron C Reference Guide 165
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-qualifier ] cpnv-prop-ident
[ property-qualifier ] cp-family-prop-ident
property-qualifier : static | global
cpnv-prop-ident : identifier [ constant-array-index-expr ]
identifier
cp-family-prop-ident : identifier
Example:
// CP for heartbeat and throttle (default 1 min each)
SCPTmaxSndT cp_family cpMaxSendT = { 0, 0, 1, 0, 0 };
SCPTminSndT cp_family cpMinSendT = { 0, 0, 1, 0, 0 };
// NV with heartbeat and throttle:
network output SNVT_lev_percent nvoValue
nv_properties
{
cpMaxSendT,
// override default for minSendT to 30 seconds:
cpMinSendT = { 0, 0, 0, 30, 0 }
};
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. 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 syntax
discussed above.
Following the
property-identifier , there can be an optional initializer , and an
optional range-mod . These optional elements can occur in either order if both are
specified. If present, the instantiation initializer for a CP family member
overrides any initializer provided at the time of declaration of the CP family;
thus, using this mechanism, some CP family members can be initialized
specially, with the remaining CP family members having a more generic initial
value. If a network variable is initialized in multiple places (in other words, in
its declaration as well as in its use in a property list), the initializations must
match.
You cannot have more than one configuration property of any given SCPT or
UCPT type that applies to the same network variable. A compilation error occurs
when a particular configuration property type is used for more than one property
in the network variable’s property list.
Finally, each property instantiation can have a range-modification string
following the property identifier. The range-modification string works identically
to the
range-mod described in Configuration Property Modifiers (cp-modifiers) on