User manual

Computer Gateway User Manual 4-77 5/96
4.7.9
4.7.9 Get Single Point Request (Internal Address)
This request from the host processor is used to fetch a single value (or an array of values)
for a point and parameter specified in the ACP's calling sequence, using the internal
address.
Eight-Character Tagname Form
H
eader information: Word 1—Transaction Code = 39
Word 2—Number of Words = 13
Word 5—CG Identifier = 2
Message format: Words 1..4—ACIDP name or blank (8 ASCII characters)
Word 5—data access priority (integer) 1=control
2=noncontrol
Word 6—data type (integer) 1=real
2=integer
3=ASCII (24-character string)
4=enumeration/Boolean
5=enumeration ordinal value
7=real array
8=integer array
9=enumeration array
10=ordinal values array
13=internal entity id
14=internal entity id array
15=external entity id (ASCII name)
16=external entity id array
17=LCN internal time
18=LCN internal time array
19=ASCII (40-character string)
20=ASCII (40-char. string) array
Words 7..10—internal parameter identifier (integer array)
Word 11—internal parameter subscript (integer)
Word 12—parameter qualifier (integer)
Word 13—enumeration set identifier (integer)
Use information: Words 6 through 10, 12, and 13 must be the same as previously
obtained from the Convert Identifier Return (4.7.8). Word 11
may be changed depending on data–type specification. See
paragraph 4.7.1 for an explanation of this field’s use with single
parameters and with parameter arrays.