User manual

Computer Gateway User Manual 4-56 5/96
4.7.3
Sixteen-Character Tagname Form
Header information: Word 1—Transaction Code = 128
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
6=LCN external time (see 4.7.3)
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: Point name index must = 0
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.
4.7.3 Get LCN Time
This variation of the get single point request (28 or 128) is used to fetch the LCN time in a
format of MM/DD/YY HH:MM:SS. The header is unchanged. The data type is specified
as 6 (time type). The remaining fields are ignored.