User manual

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.