Flowserve MX/QX Profibus DP/PA Field Unit - Manual (Page 70)

PB DPV1 / PA Field Unit Installation and Maintenance FCD LMENIM2336-03 – 12/12
70
Status Bit Definitions
Reprinted from “PROFIBUS-PA Profile for Process Control Devices, Version 3.0.”
© Copyright PNO e. V. 1999. All Rights Reserved.
Value & Status – Floating Point Structure
This data structure consists of the values and the state of the Floating Point parameters. These
parameters can be inputs or outputs.
Data Type Value & Status – Floating Point
Key Attribute Index = 33
Attribute: Number of Elements = 2
Attribute: List of Elements (shown below)
E Element Name Data Type (Index) Size
1 Value Float - (8) 4
2 Status Unsigned 8 - (5) 1
Coding of status
The definition of status attribute is the same for all parameters (input, output, and contained). There
are four states of quality of the data, an enumerated set of sixteen sub-status values for each quality,
and four states of limits placed on the data. Limit information is generated for all status attributes of
all parameters having status. Quality bit #7 and #6 (for cascade mode) must be set to “good” in the
second word of the data message while writing to AO and DO function blocks. See coding structure
below for details.
Quality Quality Substatus Limits
Gr Gr QS QS QS QS Qu Qu
2 7 2 6 2 5 2 4 2 3 2 2 2 1 2 0
0 0 = bad
0 1 = uncertain
1 0 = good (Not Cascade)
1 1 = good (Cascade)
Meaning at = bad
0 0 0 0 0 0 = non-specific
0 0 0 0 0 1 = configuration error
0 0 0 0 1 0 = not connected
0 0 0 0 1 1 = device failure
0 0 0 1 0 0 = sensor failure
0 0 0 1 0 1 = no communication (last usable value)
0 0 0 1 1 0 = no communication (no usable value)
0 0 0 1 1 1 = out of service
Meaning at = uncertain
0 1 0 0 0 0 = non-specific
0 1 0 0 0 1 = last usable value
0 1 0 0 1 0 = substitute-set
0 1 0 0 1 1 = initial value
0 1 0 1 0 0 = sensor conversion not accurate