Types Of Message; Event Messages And Alarm Messages - Siemens simatic hmi op27 Equipment Manual

Messages
6.1

Types of Message

Event and alarm
Event and alarm messages must be configured. Event messages indicate a sta-
messages
tus in the process, whereas alarm messages indicate faults or errors. Event mes-
sages and alarm messages are issued by the PLC. Alarm messages have to be
acknowledged on account of their significance.
System messages System messages are triggered by the OP. They do not have to be configured.
System messages provide information on operating status of the OP and on
maloperations or malfunctions in communication.
6.1.1

Event Messages and Alarm Messages

Definition
The configuration defines whether a process status is indicated by an event
message or alarm message.
Messages referring to regular sequences of events or states should be catego-
rized as event messages; for example
Messages relating to disturbances of the process or status should be catego-
rized as alarm messages; for example
Alarm messages have to be acknowledged on account of their urgency. By
doing so, the operator confirms that he has taken note of the alarm message.
Alarm messages can also be acknowledged by the PLC.
Operational hints can be configured as event messages or alarm messages, in
addition to status messages. If, for example, the machine operator wishes to
start the filling operation but has forgotten to open the bottling valve on the
mixer, he can be requested to rectify the error by means of an event message;
for example
6-2
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
0000031 10:53:27
Mixing operation completed
Filing level in mixer: 5000 l
0000017 10:59:53
Bottling operation aborted
Bottling valve closed
0000037 11:01:02
Open bottling valve
04.04.97 11
04.04.97 QGR 04
04.04.97 11
OP27, OP37 Equipment Manual
3
Release 05/99