Formatting The Embedded Data Value; Td 200 Message: Creating A Word Embedded Data - Siemens SIMATIC TD 200 User Manual

Formatting the Embedded Data Value

Figure 2-10 shows the Embedded Data dialog box. This dialog box allows you to specify the
data type, format, and display characteristics of an embedded data value. You can also
select whether or not the message requires acknowledgement, whether the data value can
be edited, and whether or not editing requires a password. Some options depend on the
selections you make and do not appear when the dialog box opens.
The data format selection defines the size of the data value embedded in the message:
Select "None" when a message requires acknowledgement but there is no embedded
data value to be displayed on the TD 200.
Select "Word" when the embedded data value is an integer. A word or integer value
requires the space of two characters within your message to hold the data value.
Select "Double Word" when the embedded data value is a double word or a real (floating
point) value. A double word or real value requires the space of four characters within your
message to hold the data value.
The display format selection tells the TD 200 whether the data value is signed or unsigned.
The TD 200 uses this information when editing the data value. Signed values may be either
positive or negative numbers. Unsigned values are restricted to positive numbers.
The selection for digits to the right of the decimal provides scaling for the display of the data
value. If the data value is an integer, this selection allows you to scale the integer value for
display by specifying the location of the decimal point. For example, if the data value is equal
to 123 and you select 1 digit to the right of the decimal, the TD 200 displays 12.3.
The Embedded Data dialog box contains a check box to require acknowledgement of the
message. If a message requires acknowledgement, it flashes on the TD 200 display until the
operator presses ENTER. The dialog box also contains a check box for allowing editing of
the data value. If this box is selected, the operator can edit the embedded data value. If the
box is not checked, the data cannot be edited.
The Embedded Data dialog box also lists the address of the data value within the message.
The user program uses this address to write the data value in the message.
For this example, make the selections shown in Figure 2-10 and click "OK."
Embedded Data
Data Format:
User must acknowledge message
Is the user allowed to edit this data?
Delete
Figure 2-10 TD 200 Message: Creating a Word Embedded Data
SIMATIC TD 200 Operator Interface
C79000-G7076-C205-04
Display Format:
None Signed
Word Unsigned
Double Word
Configuring the TD 200
Digits to the right of the
decimal
1
Address of Data Value: VW98
OK Cancel
2-11