Proline Promass 83 PROFIBUS DP/PA Trouble-shooting
Endress+Hauser 121
9.2 System error messages
Serious system errors are always recognised by the instrument as “Fault message” and are shown
as a lightning flash ($) on the display! Fault messages immediately affect the inputs and outputs.
Simulations and positive zero return, on the other hand, are classed and displayed as “Notice
messages”.
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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 Endress+Hauser.
→ Page 10
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!
• The listed error message types below correspond to the factory setting.
• Also observe the information on the following pages: → Page 47
9.2.1 Displaying the device status on PROFIBUS
Display in the operating program (acyclic data exchange)
The device status can be queried using an operating program via the “ACTUAL SYSTEM
CONDITION” function.
Function group → SUPERVISION → SYSTEM → OPERATION → ACTUAL SYSTEM
CONDITION.
Display in the PROFIBUS master system (cyclic data exchange)
If the AI or TOTAL modules are configured for cyclic data exchange, the device status is coded in
accordance with PROFIBUS Profile Specification 3.0 and transmitted with the measured value to
the PROFIBUS master 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. 51: Structure of the quality byte
The contents of the quality byte depends on the configured failsafe mode in the Analog Input
function block 1…6 or totalizer function block 1…3. Depending on the failsafe mode configured in
the FAILSAFE_TYPE function, the following status information is transmitted to the PROFIBUS
master by means of 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
O.K.
Low
High
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