Siemens SITRANS F M Intermag 2, Руководство по эксплуатации

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Operation
5-45
SITRANS FM Intermag 2 Flow Transmitter
Operating Manual - A5E00102775-03
The status bytes consist of three components:
S
Quality (the MSBs 6 and 7):
describes the basic quality of the corresponding measured value
S
Substatus (bits 2 to 5):
Differentiates the quality of the corresponding measured value
S
Limits (the LSBs 0 and 1):
indicate exceeding of the limit value
These components may adopt the following values in SITRANS FM:
Bit
7
Bit
6
Profile Designation Meaning
0 0 bad Useless measured value
0 1 uncertain Uncertain measured value
1 0 good (not cascade) Measured value OK
Table 5-7 Formats of the quality bits
Bit
5
Bit
4
Bit
3
Bit
2
Bezeichnung Meaning
0 0 0 1 configuration error Error in parameterization, i.e. upper and lower value for
measuring or output scale identical
0 0 1 0 not connected Sensor error or sensor not connected
0 0 1 1 device failure RAM or EEPROM defective;diagnostic bit ”Memory
error” is set additionally and diagnostic message ”RAM error”
or ”EEPROM error” displayed locally
0 1 1 1 out of service Corresponding function block is in ”Out of service” mode
(see parameter ”MODE_BLK actual”)
0 0 0 0 non specific Immersion check:
at least one electrode not immersed
0 0 0 1 last usable value Failsafe operation: current measured value replaced by the last
good measured value
0 0 1 0 sunstitute set Failsafe operation: current measured value replaced by the
agreed failsafe valuet
0 1 0 0 initial value Failsafe operation or state before first measurement: actual
measured value replaced by start value
0 1 0 0 sensor conversion
not accurate Measured value is outside the sensor limits
0 0 0 0 O.K. Measured value is OK (normal state)
0 0 0 1 update event A parameter with memory attribute ”static” was changed locally
or by PROFIBUS
0 0 1 0 active advisory alarm Upper warning limit exceeded or lower
warning limit dropped below
0 1 0 0 active critical alarm Upper alarm limit exceeded or lower
alarm limit dropped below
Table 5-8 Formats of the substatus bits