Lenze I/O system 1000 - Page 257

6 PROFIBUS communication
6.6 Parameterising temperature measurement
257
Lenze · I/O system 1000 · Reference Manual · DMS 5.0 EN · 09/2016 · TD17
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Diagnosealarm
You have the possibility of globally activating a diagnostic alarm for the module via
parameterisation (data set 0x00). A diagnostic alarm occurs if a further process alarm is triggered
for the same event during a process alarm processing in the OB 40.
By activation of a diagnostic alarm the current process alarm processing in the OB 40 is interrupted
and branched to the diagnostic alarm processing in OB 82. If further events occur on other channels
during the diagnostic alarm processing, which can trigger a process or diagnostic alarm, they are
buffered. At the end of the diagnostic alarm processing, first all buffered diagnostic alarms are
processed in order of their occurrence, and afterwards all process alarms.
If further process alarms occur on a channel for which a diagnostic alarm
incoming
is currently
processed or buffered, they are lost. If a process alarm for which a diagnostic alarm
incoming
has been
triggered is processed, the diagnostic alarm processing is called again as diagnostic alarm
outgoing
.
All events of a channel between the diagnostic alarm
incoming
and diagnostic alarm
outgoing
are not
buffered and get lost. During this time (first diagnostic alarm
incoming
to the last diagnostic
alarm
outgoing
), the MF-LED of the module is lit. Additionally, an entry in the diagnostic buffer of the
CPU is made for every diagnostic alarm
incoming/outgoing
.
Example:
Process alarm:
OB40:
Without diagnostic alarm:
OB40:
OB82:
OB40_1
OB82_1 OB82_2 OB82_1 OB82_2
Buffer memory proc. (FIFO):
OB40_2 OB40_3 OB40_4
22
3
2
3
4
3
4
4
Buffer memory (FIFO):
234
OB40_1 OB40_2 OB40_3 OB40_4
With diagnostic alarm:
lost
2
Buffer memory diag. (FIFO):
21
4
incomming incomming outgoing outgo.
1
1 2 1 2 3 4 2
1
1
1 2 3
4
OB40_2
1
2
2 3 3
2 1 2
lost
lost