Property list declarations – Echelon Neuron C User Manual
Page 237
Neuron C Reference Guide
217
The functional block name can specify either a scalar or a single-dimensioned
array (like a network variable declaration). The functional block can also
optionally have an external name, and this external name can either be a string
constant or a resource file reference.
fblock-name-section
:
fblock-name
fblock-external-name
fblock-name
fblock-name
:
variable-identifier
[
constant-expr
]
variable-identifier
fblock-external-name
:
external_name (
concatenated-string-constant
)
external_resource_name (
concatenated-string-constant
)
external_resource_name (
constant-expr
:
constant-expr
)
Property List Declarations
The following is Neuron C syntax for property declarations. The property
declarations for the device, for a network variable, and for a functional block are
identical in syntax except for the introductory keyword. The keywords were
designed to be different to promote readability of the Neuron C code. Although a
network variable or a functional block can only have at most one property list,
there can be any number of device property list declarations throughout a
program, and the lists are merged into a single property list for the device. This
feature promotes modularity of code.
device-property-list-declaration
:
device_properties {
property-instantiation-list
}
nv-property-list-declaration
:
nv_properties {
property-instantiation-list
}
fblock-property-list-declaration
:
fb_properties {
property-instantiation-list
}
The property instantiation list is a comma-separated list of one or more property
instantiations. A property instantiation uses the name of a previously declared
network variable configuration property or the name of a previously declared CP
family. The instantiation can optionally be followed by either an initialization or
a range-modification, or both, in either order.
property-instantiation-list
:
property-instantiation-list
,
complete-property-instantiation
complete-property-instantiation
complete-property-instantiation
:
property-instantiation
[
property-initialization
] [
range-mod
]
property-instantiation
[
range-mod
] [
property-initialization
]
property-initialization
:
=
variable-initialization