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SIMOVERT MV Commissioning Instructions
95
5.2.6
Message system processing
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The OP2 combines all of the incoming messages into a dedicated message
system which can administer a maximum of 30 messages (save). If more
messages are received, then the messages which were first received, are
overwritten (ring buffer mechanism), and an overflow message is entered into the
buffer. Operating message No. 15 (”NUMBER OF LOST MESSAGES: xx”), xx
specifies the number of messages which have been overwritten.
Only one message can be displayed at any one time. OP2 chronologically sorts all
of the messages which it has received.
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An OP2 does not have to administer all of the messages which it receives from
SIMADYN D. Messages classes are assigned as selection criteria to define which
messages the OP2 should administer. These are specified when the OP2 is para-
meterized. All of the messages can be permitted, or 1, 2 or 3 message class
ranges.
The message classes are defined in SIMADYN D when the message systems are
configured.
(refer to the system software and configuring D7-SYS, message class = prefix).
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The message system processing is selected using the MSG key. The key LED is lit
(bright) after it has been selected. If the OP2 has not received any messages,
operating message No. 16 is displayed (”NO MESSAGES AVAILABLE”). The text
is kept until either a message is received, or another function is selected (e.g. VAL
key).
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Message operation is re-selected (the last selected message is displayed)
Jump to the next message
DELETE
ACT
+
DEL
OLD
+
DEL
ACT
+
PRN
OLD
+
PRN
Deletes the
Deletes all old
Prints the presently
Prints all old
currently displayed
messages including
displayed
messages including
message
the currently
message
the currently displayed
displayed message
message
Selects the next-younger or next-older message
The currently executed function is aborted using:
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Return to display operation:
06*
If the OP2 has received new messages from SIMADYN D (since the last time that
the message system processing was selected), then the LED in the MSG flashes,
if the message system processing has not been selected.
When the message system processing is re-selected, the last selected message is
re-displayed. The latest message is displayed when the key is pressed again. You
can scroll in the selected OP2 message system using the raise/lower keys. Invalid
key combinations are rejected directly at the OP2 with an appropriate
acknowledgement.
