34
Installation and Operation Manual
X-DPT-Profibus-DP-Interface-eng
PN 541-C-068-AAG
November, 2008
4.5.5
Secondary non-fatal system errors
Table 5-5 below shows the bit-mapped alarm bits of the fourth extended diag-
nostics byte, the secondary non-fatal system errors. These error bits all indi-
cate a secondary non-fatal system alarm, non-hardware related. At the occur-
rence of one or more of these alarms the device will continue to operate as best
as possible. Again erroneous signal levels are limited to operational levels
before processing and the alarm will disappear if the situation returns to normal.
All of these error/alarm message bits can be disabled through the
parameterization message.
Table 5-5: Diagnostics: Secondary non-fatal system error/alarm bits.
Diagnostics byte 3: Secondary non-fatal system errors/alarms
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Totalizer
High
L o w
Reserved
overflow
flow
flow
error
error
0
0
0
0
0
0=OK
0=OK
0=OK
1=Alarm
1=Alarm
1=Alarm
Explanation of error/alarm bits:
1.
Low flow error
: This error occurs if the flow signal drops below the low
flow alarm limit, set in the database. The alarm will disappear if the signal
exceeds the low flow limit again.
2.
High flow error
: This error occurs if the flow signal exceeds the high flow
alarm limit, set in the database. The alarm will disappear if the signal drops
below the high flow limit again.
3.
Totalizer overflow
: The totalizer overflow error occurs if the maximum
value of the totalizer is reached. The totalizer will roll over and start again
from 0, but the overflow is signalled to the master. It will only disappear after
a totalizer reset.
4.5.6 Non-fatal ambient errors
Finally Table 5-6 below shows the bit-mapped alarm bits of the fifth extended
diagnostics byte, the non-fatal ambient errors.These error bits all indicate an
ambient related non-fatal ambient related alarm. At the occurrence of one or
more of these alarms the device will continue to operate as best as possible.
Again erroneous signal levels are limited to operational levels before processing
and the alarm will disappear if the situation returns to normal. All of these error/
alarm message bits can be disabled through the parameterization message.
Table 5-6: Diagnostics: Non-fatal ambient error/alarm bits.
Diagnostics byte 4: Non-fatal ambient errors/alarms
Bit 7
Bit 6
Bit 5 *
Bit 4
Bit 3
Bit 2 *
Bit 1
Bit 0
Flow
Temp.
Reserved
No flow
Power
Temp.
Reserved
obstruct.
too low
indication
too low
too high
error
error
error
error
error
0
0
0=OK
0=Ok
0
0=OK
0=OK
0=OK
1=Alarm
1=Alarm
1=Alarm
1=Alarm
1=Alarm
* Applies to controller models only. For meter models these bits will never be set.
