Omron NT15S, Руководство по эксплуатации

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Standard Mode
Section 4-8
4.8.6 Memory Requirements for Storing Data Sets
The RAM in the terminal that is not required by the system (approximately 110,000
bytes) is used to store messages as well as data sets that have been stored in the
RAM.
The size of the message buffer is configurable. Each message takes up 24 bytes.
This makes a total of 12,000 bytes for the default message buffer size (500 mes-
sages), so that a further 98,000 bytes are available for storing data sets.
Space is also needed to store the data set name and management information
(additional 28 bytes per data set).
Example:
If the data set size is programmed as 22 bytes, a total of
98,000 / (22 + 28) = 1960
data sets can be saved in the RAM (message buffer size: 500). Other, fixed pro-
grammed data sets can also be stored in the Flash-Eprom.
4.9 Message System
The message system is an integral part of the operating concept. Messages are
reactions to events that enable these events to be communicated to the operator in
an intelligible form. A distinction is made between internally and externally generat-
ed messages, depending on where the event occurred. The diagram below shows
the structure of the message system.
Message System
Internal Messages External Messages
System Messages Serial
Message System
Error Messages Parallel
Message System
Fig. 14: Structure of the TesiMod message system
The grayed parts of the messages are freely configurable.
4.9.1 Internal Messages
Internal messages are all messages that are sent by the operating system to the
operator. There is a further subdivision between system messages and error
messages. The user (programmer) can not influence the generation of these
messages.
4.9.1.1 System Messages
System messages are generated by the operating system as a result of internal
plausibility checks. A system message is activated immediately after the corre-
sponding event has occurred.
Pending system messages are signaled to the operator by a flashing Help key. If
the Help key is pressed, the system message text will be displayed in its full length