Removing Faults; Alarms And Messages - Siemens OXYMAT 64 Operating Instructions Manual

6.6

Removing faults

6.6.1

Alarms and messages

The device is able to detect functional irregularities. These appear as "Maintenance request"
or "Fault" in the status line of the measured value display. At the same time, they are
recorded in the logbook (function 3) and can be called up there. Logbook entries which have
to be acknowledged are identified by a dot. You acknowledge a message by pressing the
softkey next to the corresponding logbook entry. If you do not eliminate the cause, the
message will appear again.
Latching
Certain logbook messages are latching (e.g. "Sensor temperature outside tolerance limits").
They must be acknowledged manually or via binary input in order to reset them, but they
appear again immediately if the cause of the message has not been eliminated.
Note: acknowledgment via a binary input should be carried out only with brief setting
(approx. 1 s) since latching of the associated fault message otherwise remains ineffective.
If a new message appears, the record stored in the logbook is shifted back one place in the
memory. There are a total of 32 memory locations available. If all 32 memory locations are
already occupied when another record arrives (no. 33), the oldest one (no. 1) is overwritten.
A power failure deletes all records.
It cannot be excluded that all pages of the logbook are rapidly used up in the case of a high
message rate (logbook "overflows"). It can occur that unacknowledged messages are no
longer visible in the logbook, but are nevertheless still saved. These entries will continue to
result in fault messages. Deletion is only possible if the logbook is deleted completely using
function 60.
Logbook entries which have to be acknowledged are identified in the following tables by "Q"
in the column "No.".
You can block the logbook or even delete the messages in it with function 60. This might be
especially helpful during test operation.
All messages can be shut off individually with function 87. In normal operation, we
recommend that this option is not used.
OXYMAT 64
Operating Instructions, 06/2008, A5E00880383-03
Repair, maintenance and servicing
6.6 Removing faults
109