Echelon Neuron C - Manual (Page 242)

222 Syntax Summary
Primary Expressions, Built-in Variables, and Built-in
Functions
In addition to the ANSI C definitions of a primary expression, Neuron C adds
some built-in variables and built-in functions. Neuron C removes float-constant
from the standard list of primary expressions.
primary-expr :
parenthesized-expr
integer-constant
concatenated-string-constant
variable-identifier
property-reference
builtin-variables
builtin-functions actual-parameters
msg-call-kwd ( )
concatenated-string-constant :
concatenated-string-constant string-constant
string-constant
property-reference :
[ postfix-expr ] :: variable-identifier
postfix-expr :: director actual-parameters
postfix-expr :: global_index
postfix-expr :: nv_len
builtin-variables :
one of activate_service_led
config_data
cp_modifiable_value_file
cp_modifiable_value_file_len
cp_readonly_value_file
cp_readonly_value_file_len
cp_template_file | cp_template_file_len
fblock_index_map
input_is_new | input_value
msg_tag_index
nv_array_index | nv_in_addr | nv_in_index
read_only_data | read_only_data_2
msg-name-kwd . variable-identifier
msg-name-kwd :
one of msg_in | msg_out | resp_in | resp_out
builtin-functions :
one of abs | addr_table_index
bcd2bin | bin2bcd