Endress+Hauser Proline t-mass 65 PROFIBUS DP, Руководство по эксплуатации

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Trouble-shooting Proline t-mass 65 PROFIBUS DP
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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 variable 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. 38: 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 1 to 3 or totalizer function block 1 to 2.
Depending on which failsafe mode has been set in the FAILSAFE_TYPE function, the following
status information is transmitted to the PROFIBUS master via the quality byte:
• For the selection FAILSAFE_TYPE
→
FSAFE VALUE :
• For the selection FAILSAFE_TYPE
→
LAST GOOD VALUE (factory setting):
If a valid output value was available before the failure:
If no valid output value was available before the failure:
• For FAILSAFE_TYPE
→
WRONG VALUE:
For status information, see the table in the following section.
!
Note!
The FAILSAFE_TYPE function can be configured in the corresponding Analog Input function block
1 to 3 or Totalizer function block 1 to 2 by means of an operating program (e.g. FieldCare).
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
Quality code (HEX) Quality status Quality substatus Limits
0x44
0x45
0x46
UNCERTAIN Last usable value
OK
Low
High
Quality code (HEX) Quality status Quality substatus Limits
0x4C
0x4D
0x4E
UNCERTAIN Initial Value
OK
Low
High