User Manual

Siemens Building Technologies VISONIK DCS Functions and System Messages VVS18 CM2U8567E / 04.1999
Landis & Staefa Division Function DPO 2-89
2.11.9 Validity Marker
Every stored value is complemented with a 'Validity Marker'. Upon listing in tabular
format, Validity Markers are shown as hexadecimal numbers enclosed in brackets and
in long format as an abbreviation with three letters.
Tabular Format Long Format
-------------- -----------
22.8 (94) ! 22.8 (?HW) 0
Validity Marker Structure
Validity Markers are dimensioned with 8 bits (1 Byte).
B7 B6 B5 B4 B3 B2 B1 B0
|-----|-----|-----|-----|-----|-----|-----|-----|
| 1 | 1 | 1 | 1 | 1 | 1 | 1/0 | 1/0 | LIST
|-----|-----|-----|-----|-----|-----|-----|-----| |TFRM|LFRM|
| | | | | | | | -----------
| | | | | | | --> 2**0 = | 1 |0..3|
| | | | | | --------> 2**1 = | 2 |0..3|
| | | | | --------------> 2**2 = | 4 |Hnd |
| | | | --------------------> 2**3 = | 8 |Lim |
| | | --------------------------> 2**4 = | 10 |NEv |
| | --------------------------------> 2**5 = | 20 |OSV |
| --------------------------------------> 2**6 = | 40 |Nov |
--------------------------------------------> 2**7 = | 80 |?HW |
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> Hexadecimal
Legend
Faults are marked by logical 1 | Ex. of fault messages in |
| LI, LFRM |
---------------------------------------|---------------------------|
B7 : HW trouble --> log. 1 | ! (?HW) |
B6 : No value --> log. 1 | ^ (NoV) |
B5 : OSV (out of service) --> log. 1 | | (OSV) |
B4 : No Event --> log. 1 | | (NEv) |
B3 : Limit under/overflow --> log. 1 | | (Lim) |
B2 : Hand input --> log. 1 | | (Hnd) |
B1 : Flag value --> (1/0) | | ( ) 1..3 |
B0 : Flag value --> (1/0) | | ( ) 1..3 |
Validity Marker Description
Two bits signal the Flag status which means four different Flag values 0, 1, 2, 3 can be
set for a Flag Point (e.g. $F2). If no Flag address has been defined in Function
DPO,GEN then Flag value 0 is given for each logged value.
Only one Flag address can be defined in Operation GEN. The Flag value must be set in
the associated Flag Point.
This "Hnd" marker is set if a manual entry has been made through Operation MOD.
This "Lim" marker is set if, for example, a ME point violates its HIL or LOL limits.
B0+B1 (Flag status)
Note
B2 --> Hnd
(Hand input)
B3 --> Lim
(Limit under/overflow)