User manual

Computer Gateway User Manual 4-72 5/96
4.7.7
Sixteen-Character Tagname Form
Header information: Word 1—Transaction Code = 141
Word 2—Number of Words = 31
Word 5—CG Identifier = 2
Message format: Words 1..8—ACIDP name or blank (16 ASCII characters)
Word 9—data access priority (integer) 1=control
2=noncontrol
Word 10—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
Word 11—LCN PIN node ID (2 ASCII characters)
Words 12..19—point name (16 ASCII characters)
Word 20—point name index (integer)
Words 21..24—parameter name (8 ASCII characters)
Word 25—parameter index x (integer)
Word 26—parameter index y (future use)
Words 27..31—reserved for future use (fill with integer zeros)
Use information: The internal address value for a given point/parameter can change
whenever additions or deletions are made to the LCN database.
Point name index must = zero
Content of the field "parameter array pointer/size" depends on
data-type specification. See paragraph 4.7.1 for an explanation of
this field's use with single parameters and with parameter arrays.