Siemens SITRANS F M Intermag 2, Operating Instructions Manual

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Operation
5-50
SITRANS FM Intermag 2 Flow Transmitter
Operating Manual - A5E00102775-03
The DIAGNOSIS part contains diagnostic messages of the device
and has the following structure (Bit 0 = LSB, Bit 7 = MSB):
Bit No. Description
Meaning
Cause (local message)
0 DIA_HW_ELETR Hardware failure of the
electronic ”Com.--Module failure”
Communications module cannot be addressed
electronic
Sensor failure
(sensor failure)
”Measurement module failure”
4 DIA_MEM_CHKSUM Memory error ”Memory failure”
5 DIA_MEASUREMENT Measurement failure ”Flow measurement failure” _
”Tube empty”
”Measuring range overflow”
Table 5-14 Format of the diagnostic data, Byte 5 (=DIAGNOSIS Byte 1)
Bit No.
Description Meaning Cause (local message)
0 ... 6 reserved ---
7 EXTENSION_
AVAILABLE More diagnosis
information is available More diagnosis information available (here:
Local messages see DIAGNOSIS--Byte 1)
Table 5-15 Format of diagnostic data, Byte 8 (=DIAGNOSIS Byte 4)
The bits in DIAGNOSIS usually take over the function of a group
message which can then be split up in detail using the local
messages.
The EXTENSION_AVAILABLE bits indicates that other diagnostic
information is available, basically details of the DIAGNOSIS
message. This information is displayed locally.
The measured value-related messages are transmitted additionally
cyclically with the measured values in the status byte (Substatus).
Examples for telegrams with diagnostic data (Ext_Diag_Data):
All diagnostic bits are reset in the initial state. When the ”Tube
empty” event occurs (byte 5, bit 5 set), this gives the following
diagnostic data:
Diagnosis Byte No.
1 2 3 4 5 6 7 8
Value (hex) 08 FE 01 01 20 00 00 80
Meaning
s. Table 5-12
Header Diagnosis