FMC Corporation - Talstar 80 - Handbuch (Seite 71)

Proline Promass 80 PROFIBUS PA Troubleshooting
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9.2 System error messages
Serious system errors are always recognized by the instrument as "Fault message" and are shown
as a lightning flash (
$) on the display! Fault messages immediately affect the outputs. Simulations
and positive zero return, on the other hand, are classed and displayed as "Notice messages".
"
Caution!
In the event of a serious fault, a flowmeter might have to be returned to the manufacturer for repair.
Important procedures must be carried out before you return a flowmeter to FMC Technologies.
→ Page 8
Always enclose a duly completed "Declaration of contamination" form. You will find a preprinted
blank of this form at the back of this manual.
!
Note!
See the information on
→ Page 40
9.2.1 Displaying the device status on PROFIBUS PA
Display in the operating program (acyclic data transmission)
The device status can be queried using an operating program (e.g. FieldCare):
Function block SUPERVISION
→ SYSTEM → OPERATION → ACTUAL SYSTEM CONDITION
Display in the PROFIBUS master system (cyclic data transmission)
If the AI or TOTAL modules are configured for cyclic data transmission, the device status is coded
in accordance with PROFIBUS Profile Specification 3.0 and transmitted with the measured value to
the PROFIBUS master (Class 1) by means of the quality byte (byte 5). The quality byte is split into
the "quality status", "quality substatus" and "limits" segments.
a0002707-en
Fig. 36: Structure of the quality byte
The content of the quality byte depends on the failsafe mode error behavior configured in the
corresponding Analog Input function block. Depending on which failsafe mode has been set in the
FAILSAFE_TYPE function, the following status information is transmitted to the PROFIBUS master
(Class 1) via the quality byte:
• For FAILSAFE_TYPE
→ FSAFE VALUE:
Quality
Code Measuring value
Limits Quality Substatus
Quality
Status
Byte 5
Quality code (HEX) Quality status Quality substatus Limits
0x48
0x49
0x4A
UNCERTAIN Substitute set
OK
Low
High