Echelon NodeBuilder Errors 3120 User Manual download pdf (Page 70)

5-50 Neuron C Compiler Errors (NCC)

NCC# Description

417 Invalid declaration type for ‘properties’ clause [NCC#417]

The Neuron C Version 2 syntax permits nonsense declarations like

the following examples, but the compiler later determines that the

nv_properties clause can only apply to a network variable

declaration.

Improper uses of the nv_properties clause:

static int abc nv_properties { heartbeatTime };

SNVT_temp_f temperature

nv_properties { heartbeatTime };

Proper use of the nv_properties clause:

network output SNVT_temp_f temperature

nv_properties { heartbeatTime };

In the second "improper use" example above, the declaration may be

confused with a network variable declaration, however, it is not. The

declaration actually is just a variable declaration using the type of

the SNVT (this is a legitimate declaration, but not a network

variable, so it cannot have a property list).

418

Cannot have multiple ‘properties’ clauses on a variable

[NCC#418]

The Neuron C Version 2 syntax permits nonsense declarations like

the following example, but the compiler later determines that there

are too many properties clauses in the declaration.

Improper use of the nv_properties clause:

network output SNVT_temp_f temperature

nv_properties { heartbeatTime }

nv_properties { defaultOutput };

The properties clause is a comma-separated list, and corrected use of

the declaration above is shown below:

network output SNVT_temp_f temperature

nv_properties { heartbeatTime,

defaultOutput };

419 A ‘cp’ network variable cannot be an ‘output’ NV [NCC#419]

Configuration property network variables can only be declared as

input network variables. See the chapter describing the use of

configuration properties in the Neuron C Programmer's Guide.

420 Network variable’s property is a duplicate [NCC#420]

The L

ONMARK Application Layer Interoperability Guidelines specify

that no more than one property of any particular SCPT or UCPT type

may be used for a network variable. Consult that document for more

information.

421 Overuse of ‘cp’ network variable [NCC#421]

A configuration property implemented using a network variable may

not appear in more than one property list, unless the property list

also uses the static or global keyword. The same network variable

cannot be used as a property for the device, network variables, and

functional blocks simultaneously. See the chapter describing the use

of configuration properties in the Neuron C Programmer's Guide.

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