Computer Expressions 40CG Manual do Utilizador descarregar pdf (Página 81)

Computer Gateway User Manual 4-45 5/96

4.6.2

4.6.2 Get Data Request (Internal DDT in Host Processor)

This message from the host processor is used when no copy of the Internal DDT is kept by

the CG, and the Internal DDT becomes part of the request message.

Eight-Character Tagname Form

Header information: Word 1—Transaction Code = 4

Word 2—Number of Words = 5 plus size of the Internal DDT

Word 5—CG Identifier = 2

Message format: Words 1..4—ACIDP or blank (8 ASCII characters)

Word 5—data access priority (integer) 1=control

2=noncontrol

Word 6—start of Internal DDT formatted as explained in

paragraph 4.5.2

Use information: The Internal DDT used by this request must be previously created

(messages 6 and 9) with no errors reported.

Sixteen-Character Tagname Form

Header information: Word 1—Transaction Code = 104

Word 2—Number of Words = 14 plus size of the Internal DDT

Word 5—CG Identifier = 2

Message format: Words 1..8—ACIDP or blank (16 ASCII characters)

Words 9..13—reserved for future use (fill with integer zeros)

Word 14—data access priority (integer) 1=control

2=noncontrol

Word 15—start of Internal DDT formatted as explained in

paragraph 4.5.2

Use information: The Internal DDT used by this request must be previously created

(messages 106 and 9) with no errors reported.

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Computer Expressions 40CG Manual do Utilizador Página 81