Embedding Data Values In A Text Message; Data Value Format Options - Siemens SIMATIC TD 200 User Manual

TD 200 Parameters and Messages
D.4

Embedding Data Values in a Text Message

The TD 200 allows you to place data values within the message that you want to
display. You can display and edit these embedded values. Each embedded value
must be preceded by a format word which defines how the value is displayed and
whether the message requires acknowledgement.

Data Value Format Options

The format word in a message provides the following information:
How the value is displayed-signed or unsigned; word, double word, or real
(floating-point); and decimal position
Whether or not the message requires acknowledgement
Whether the optional data value is editable
Whether editing requires a password
You can use format words alone, with an optional word value, with an optional
double word value, or with an optional real (floating-point) value. The format word
uses two bytes of your message if it is not followed by a data value, four bytes of
your message if the format word is followed by a word value, and six bytes of your
message if the format word is followed by a double word value or a real
(floating-point) value. Figure D-9 shows each type of format word usage.
Format Word without an Optional Data Value
Byte 0
MSB of
Format
Format Word with an Optional Word Value
Byte 0
MSB of
Format
Format Word with an Optional Double Word Value or Real (Floating-Point) Value
Byte 0
MSB of
Format
Figure D-9 Format Word Usage
D-12
NOTE: This allows you to configure a message for
Byte 1
acknowledgement (to be flashing), but to have no data
LSB of
to display.
Format
Byte 1 Byte 2 Byte 3
LSB of MSB of LSB of
Format Word Word
Byte 1 Byte 2 Byte 3
LSB of MSB of
Format DWord
Byte 4 Byte 5
LSB of
DWord
SIMATIC TD 200 Operator Interface
C79000-G7076-C272-01