IEC PAS 61162-100:2002 pdf download Maritime navigation and radiocommunication equipment and systems – Digital interfaces – Part 100: Single talker and multiple listeners – Extra requirements to IEC 61162-1 for the UAIS
nDefinitions
3.1Parametric sentences
(See IEC 61162-1 clause 5 Data format protocol)
These sentences start with the “$” (HEX 24) delimiter and represent the majority of approvedsentences defined by lEC 61162-1 and this PAS. This is the preferred method for conveyinginformation.Refer to clauses 5 and 6 for details.
The maximum number of characters in a sentence shall be 82, consisting of a maximum of 79characters between the starting delimiter “$” and the terminating delimiter
The minimum number of fields in a sentence is one (1). The first field shall be an address fieldcontaining the identity of the talker and the sentence formatter, which specifies the number otdata fields in the sentence, the type of data they contain and the order in which the data fieldsare transmitted. The remaining portion of the sentence may contain zero or multiple datafields.
The maximum number of fields allowed in a single sentence is limited only by the maximumsentence length and shall always be used even if data for that field is unavailable.
The basic rules for parametric sentence structures are!
The sentence begins with the“$”delimiter
Only approved sentence formatters are allowed. Formatters used by special-purposeencapsulation sentences cannot be re-used.(See lEC 61162-1, clause 6.2 (table 5).)Only valid characters are allowed. (See IEC 61162-1, clause 6.1 (tables 1 and 2).)Only approved field types are allowed. (See IEC 61162-1, clause 6.2 (table 6).)Data fields (parameters) are individually delimited, and their content is identified and oftendescribed in detail by this standard.
Encapsulated non-delimited data fields are NOT ALLOWED
3.2Encapsulation sentences
(New definition not currently in IEC 61162-1)
These sentences start with the “!” (HEX 21) delimiter. The function of this special-purposesentence structure is to provide a means to convey information, when the specific datacontent is unknown or greater information bandwidth is needed, This is similar to a modemthat transfers information without nowing how the information is to be decoded orinterpreted.
The basic rules for encapsulation sentence structures are:
The sentence begins with the “!” delimiter.
Only approved sentence formatters are allowed. Formatters used by conventionalparametric sentences can not be re-used. (See clauses 5 and 6, and IEC 61162-1, clause
6.2 (table 5)).Only valid characters are allowed. (See lEC 61162-1, clause 6.1 (tables 1 and 2).)Only approved field types are allowed. (See annex B.5 and IEC 61162-1，clause 6.2(table 6).)
Only Six bit coding may be used to create encapsulated data fields. (See annex B.5.)
The sentence contains a “Total Number Of Sentences” field. (See annex A.)
The sentence contains a “Sentence Number” field. (See annex A.)
IEC PAS 61162-100:2002 pdf download
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