Echelon Neuron C - Manual (Page 186)

166 Network Variable, Configuration Property, and Message Tag Declarations
page 171. A range-modification string provided in the instantiation of a CP
family member overrides any range-modification string provided in the
declaration of a CP family.
Unlike device properties, network variable properties can be shared between two
or more network variables. The use of the global keyword creates a CP family
member that is shared between two or more network variables. The use of the
static keyword creates a CP family member that is shared between all the
members of a network variable array, but not with any other network variables
outside the array. See the discussion of network variable properties in the
Neuron C Programmer’s Guide for more information.
A configuration network variable cannot, itself, also have a network variable
property list. That is, you cannot define configuration properties that apply to
other configuration properties.
Configuration Network Variable Arrays
A configuration network variable array that is a configuration property can be
used in one of two ways. Each element of the array can be treated as a separate
configuration property, or all elements of the array can be treated as a single
configuration property taken together.
To use each network variable array element as a separate, scalar configuration
property, specify the starting index of the first array element in the properties
list, as in Example 1 below. The example shows elements [2] through [5] of the
cpMaxSendT array used as properties for nvoValue[0] through nvoValue[3],
respectively, with the remaining elements of cpMaxSendT being unused.
Example 1:
network input cp SCPTmaxSendT cpMaxSendT[10];
network output SNVT_lev_percent nvoValue[4]
nv_properties
{
cpMaxSendT[2]
};
To use the entire network variable array as a single property, do not specify any
index in the properties list, as in Example 2 below. The entire array
cpMaxSendT becomes a single property of nvoValue.
Example 2:
network input cp SCPTmaxSendT cpMaxSendT[10];
network output SNVT_lev_percent nvoValue
nv_properties
{
cpMaxSendT
};
Similarly, a single network variable array element, or the entire network
variable array can be used as a device property (see Device Property Lists on
page 173).
A configuration network variable array must be shared with the static or global
keyword if it applies to a network variable array.
Example 3:
network input cp SCPTmaxSendT
cpMaxSendT[10];