Siemens SIPART PS2 PA 6DR55 Series, Operating Instructions Manual

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Functions/operations using PROFIBUS PA
11.3 Cyclic data transfer
SIPART PS2 with PROFIBUS communication
Operating Instructions, 09/2007, A5E00127926-07
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11.3.4.3 Definition of the status
Status byte
The status is used to provide information about the quality of the input and output values.
This information is classified into four stages. Quality stages such as "Bad", "Uncertain",
"Good" and "Good (cascade)" are accompanied with further information. In this case, it deals
with the sub-status and the limit bits. The status byte has the following structure:
Status byte structure
7 6 5 4 3 2 1 0
Quality Sub-status Limit bits
Quality 00 Bad
01 Uncertain
10 Good
11 Good (cascade)
Limit bits 00 Good
01 Lower limit reached
10 Upper limit reached
11 Value is constant.
The meaning of the sub-status depends on whether the condensed status is activated or not.
The sub-status is therefore specified separately for both the cases.
11.3.4.4 Sub-status for deactivated condensed status
Bit
7 6 5 4 3 2 1 0
Name profile German name
0 0 0 0 0 0 x x Bad, non specific Schlecht
0 0 0 0 0 1 x x Bad, configuration error Schlecht, Konfigurationsfehler
0 0 0 0 1 0 x x Bad, not connected Schlecht, keine Verbindung
0 0 0 0 1 1 x x Bad, device failure Schlecht, Gerätefehler
0 0 0 1 0 0 x x Bad, sensor failure Schlecht, Sensorfehler
0 0 0 1 1 1 x x Bad, out of service Schlecht, Außer Betrieb
0 1 0 0 0 0 x x Uncertain, non specific Unsicher
0 1 0 1 0 0 x x Uncertain, sensor conversion not
accurate
Unsicher, Wert ungenau
0 1 0 1 1 1 x x Uncertain, configuration error Unsicher, Konfigurationsfehler
0 1 1 0 0 0 x x Uncertain, simulated value Unsicher, Simulationswert
1 0 0 0 0 0 x x Good, ok Gut, Ok
1 0 0 0 0 1 x x Good, update event Gut, Aktiver Blockalarm