Siemens SIMATIC S5 CP 523 Manual page 83

Print Mode
Errors occurring when setting the "KFa,b" or "KFa.b" format parameters have the following
effects:
• If you specify values outside the value range for "a" and "b", the spaceholder is treated as text
and printed as configured.
• If you configure "a" with a value too small for the variable values to be printed, "?" characters
will be printed instead of the variable value.
Configu-
ration 00001
–
KF 6,2 –0,01
KF 7.2 –0.01
KF 9,2 –0,01
KF 3.0 ???
KF 2,0 ??
KF 9.5 –0.00001
KF 7,5 ???????
( = Space)
"KG" and "KGa.b" data formats
You can print out a 32-bit floating-point number in the message text. A floating-point number
requires four bytes of memory.
Note:
In the S5-135U, floating-point numbers have only a 16-bit mantissa. Bits 0 to 7 (byte n + 3) are
always 0.
Floating-point numbers can be used in the S5-115U if the standard function blocks for floating-
point arithmetic are used.
The value for the floating-point number can be transferred as follows:
• In bytes 2 to 5 if the spaceholder is the only one or the first one in the message text.
• In bytes 4 to 7 if the spaceholder is the second one in the message text.
In addition, the memory requirement of four bytes has the following effects:
• Only one spaceholder per message text can be initialized in KG or KGa.b for "Insert floating-
point number". A second spaceholder of this type would be interpreted as text and printed as
configured.
• In addition to a spaceholder for "Insert floating-point number", only one further "KV" or
"Insert variable" spaceholder can be configured per message text.
6-28
Table 6-12. Typical "KFa.b" Data Format Printouts
Printout of the KF = Variable
00008 12345
0,08 123,45
0.08 123.45
0,08 123,45
8 ???
8 ??
0.00008 0.12345
0,00008 0,12345
12345 00045
–
?????? 0,45
–123.45 0.45
–123,45 0,45
??? 45
?? 45
–0.12345 0.00045 –0.00045
??????? 0,00045
00045 00345
–
–0,45 3,45
–0.45 3.45
–0,45 3,45
–45 345
?? ??
0.0345
??????? 0,00345
EWA 4NEB 811 6044-02a
CP 523
00345
–
–3,45
–3.45
–3,45
???
??
–0.00345
???????