KROHNE CORIMASS MFC 85 Interface EN User Manual
Page 34
34
6.7
Diagnostic codes
These are related to the Modbus command 08.
Sub
command
Description
0
Echo Query command
1
Restart communcations
1
2
Return 16bit status register
2
3
Not supported
4
Turn off communications
1
5
Not supported
6
Not supported
7
Not supported
8
Not supported
9
Not supported
10
Clear event log
11
Return bus message count
12
Return CRC error count
13
Return Exception count
14
Return Slave message count
15
Return No response count
16
Return NAK count
17
Return SlaveBusy count
18
Return Communications Overrun
count
1
. These commands do not return a response.
2
. Status Register
Bit No
Meaning
00
Zero Error - Excessive flow measured during zero calibration.
01
Temperature measured > 180 C or < -25 C.
02
Sensor A out of range.
03
Sensor B out of range.
04
Ratio of sensors A/B exception. One sensor reading is >> than other.
05
Sensor A has a large DC offset.
06
Sensor B has a large DC offset.
07
No synchronization with primary head oscillations.
08
ROM checksum error detected on power-up.
09
EEPROM save error.
10
Non Volatile RAM checksum error detected on power-up
11
Power Failure recorded.
12
Watchdog System Reboot has been activated.
13
Software exception registered.
14
Temperature drifted +/- 30 C from zero calibration temperature.
15
Current Loop measurement Out of Range.