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D.3
Formatting Messages
Messages can contain multiple text fields, format words, and variables. The TD 200 allows
two message sizes.
20-character message mode – displays two messages at a time
40-character message mode – displays one message at a time
Once you choose a message size, all messages must correspond to that size. The size is
selected on a system basis in the parameter block, and not on a per-message basis. The
TD 200 uses the setting of the message size to index the messages stored in the S7-200
CPU V memory.
In applications where alarm or fault conditions can occur and notification is essential, you
can configure the TD 200 to display multiple messages.
This section shows you how to create a 20- or 40-character message.
Note
A message cannot have more than six variables. Additional variables are ignored and the
variable positions in the display remain blank.
Twenty-Character Message Format
The 20-character message format requires 20 bytes of V memory storage in the S7-200
CPU for each message. Each message is displayed on one line of the TD 200 display,
allowing two messages to be shown at the same time. Figure D-7 shows an example of how
a 20-character message can be formatted in the CPU and displayed on the TD 200.
How the Message Looks in V Memory
P R
How the Message Is Displayed on the TD 200
P R
Figure D-7 Twenty-Character Message Format
SIMATIC TD 200 Operator Interface
C79000-G7076-C205-04
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TD 200 Parameters and Messages
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Value
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D-9
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