ProSoft Technology PTQ-AFC - Manual (Page 116)

Quick Start PTQ-AFC ♦ Modicon Quantum Platform
User Manual Liquid and Gas Flow Computer for Hydrocarbon Products
Page 116 of 259 ProSoft Technology, Inc.
June 23, 2011
6.12.3 Event Id Tag
This 32-bit field has the following structure:
Bits N Meaning
31 1 0 Special, 1 Datum Point (e.g. sealable parameter)
If this bit is clear, then bits 19-00 contain a value from the Special event
tag list below; if the bit is set, then bits 19-00 have the interpretation
given here.
30 1 PLC offline; timestamp may not be accurate
This bit may also be set for a Special event.
29 1 [reserved]
28 to 24 5 Meter number, or 0 for Site
This field may also be set for a Special event.
23 to 20
4 [Meter] Stream number or 0; [Site] 0
This field may also be set for a Special event.
19 to 16 4 Datum type:
Value Mnemonic Format
0 Ubyt Unsigned byte
1 Usht Unsigned short integer
2 [reserved]
3 Ulng Unsigned long integer
4 Sbyt Signed byte
5 Ssht Signed short integer
6 [reserved]
7 Slng Signed long integer
8 Bbyt Bitmap (up to 8 bits)
9 Bsht Bitmap (up to 16 bits)
10 Bm24 Bitmap (up to 24 bits)
11 Blng Bitmap (up to 32 bits)
12 Bool Boolean (value 0 or 1)
13 DiBy Dibyte (both high and low)
14 B448 Bitfield nybble/nybble/byte
15 Flot Floating point
15 to 12 4 [reserved]
11 to 08 4 Group code
This value is one of the "measurement configuration changed" bit
numbers.
07 to 04 4 Subgroup code
This value is the ordinal number (starting at 0) of the subgroup of
parameters in the specified group.
03 to 00 4 Subgroup item code
Since a parameter subgroup may contain more than one item, this value
identifies the particular item; items are numbered from 0.