KROHNE CORIMASS MFC 85 Interface EN - Manual (Page 20)

20
8.2 Error list, Function Code (FKT) = OA Hex
Offset Variable/Format Length Meaning
0 actual_errors
(long, LSB
first) 4 Actual error messages:
Bit 0
: Mass Flow (Measured flow > 2 nominal flows of
primary head
Bit 1 : Zero Error (Excessive flow measured during zero
calibration
Bit 2 : Totalizer Overflow (Fixed precision totalizer has
rolled over)
Bit 3 : Frequency
Bit 4 : Temperature (measured temperature > 180
°
C or
< –25
°
C
Bit 5 : Sensor A OOR (Sensor A signal too small)
Bit 6 : Sensor B OOR (Sensor B signal too small)
Bit 7 : Ratio A/B (One sensor signal much bigger than
the other
Bit 8 : DC A (Sensor A has a large DC offset)
Bit 9 : DC B (Sensor B has a large DC offset)
Bit 10 : Temperature AC
Bit 11 : Sampling (No synchronisation with primary head
oscillations)
Bit 12 : Not used
Bit 13 : ROM Default (EEPROM checksum error detected
on power up)
Bit 14 : Not used
Bit 15 : EEPROM (Unable to save data into EEPROM
chip)
Bit 16 : NVRAM (Checksum error detected in NVRAM on
power up)
Bit 17 : NVRAM Cycles (NVRAM chip has had > 10000
save cycles)
Bit 18 : Power Failure -Main supply has been switched off
Bit 19 : Watchdog (System has been rebooted by
WATCHDOG chip)
Bit 20 : System (Software has got into an illegal state)
Bit 21 : Temp.Custody (Temp. drifted
±
30
°
C from zero
calibration temp.)
Bit 22 : Strain OOR (Measured strain out of range)
Bit 23 : Current 1 (Measured quantity outside range limits
for the output)
Bit 24 : U36 (Measured quantity outside range limits for
the output)
Bit 25 : Process Alarm (Measured quantity exceeded user
defined limits)
Bits 26 - 31 : Not used
4 stored_errors
(long, LSB
first) 4 Stored error messages
For bits layout refer to
actual_errors
Any actual_error becomes a stored_error when the reasons that caused it disappear. Only stored_errors may
be cleared via special request.