KROHNE BM 70A-P PROFIBUS PA DE User Manual
Page 6
Supplementary Documentation BM 70 A, BM 70 P with PROFIBUS-PA
KROHNE Messtechnik GmbH & Co. KG · Ludwig-Krohne-Str. 5
D-47058 Duisburg
6/7
Tel.: 0203-301 309 Fax: 0203-301389 · e-mail: [email protected]
Meaning of the status byte (1 Byte):
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 (Non Cascade)
1
1
= good (Cascade) - not supported
Status = 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
Status = 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
0
1
0
1
0
1
= engineering unit violation (unit not in the valid set)
0
1
0
1
1
0
= sub-normal
0 1 0 1 1 1
=
configuration
error
Status = good (Non-Cascade)
1
0
0
0
0
0
= ok
1
0
0
0
0
1
= active block alarm
1
0
0
0
1
0
= active advisory alarm (priority < 8)
1
0
0
0
1
1
= active critical alarm (priority > 8)
1
0
0
1
0
0
= unacknowledged block alarm
1
0
0
1
0
1
= unacknowledged advisory alarm
1
0
0
1
1
0
= unacknowledged critical alarm
1
0
1
0
0
0
= initiate fail safe
1 0 1 0 0 1
=
maintenance
required
Status = Limits
0
0
= ok
0
1
= low limited
1
0
= high limited
1
1
=
constant
Check the first two quality bits in order to get the quality information of the measurement value:
Good (non Cascade) measurement value is ok and can be used without restrictions
Uncertain
measurement value can be used but the accuracy can not be guaranteed (e.g. measurement
value has been frozen or A/D converter is saturated)
Bad
measurement value is bad don´t use it
Good (Cascade)
not supported because it´s not applicable for measurement devices
Diagnostics
If the device has been detected an error additional diagnostic information will be send to the master. The meaning of
the additional information is described within the GSD file under UNIT_DIAG_BIT(i).