Siemens SIMATIC S7-1200 - Page 354

Extended instructions
9.2 String and character
S7-1200 Programmable controller
354 System Manual, V4.2, 09/2016, A5E02486680-AK
Table 9- 31 Example of S_CONV string to value conversion
IN string
OUT data type
OUT value
ENO
"123"
Int or DInt
123
TRUE
"-00456" Int or DInt -456 TRUE
"123.45"
Int or DInt
123
TRUE
"+2345" Int or DInt 2345 TRUE
"00123AB"
Int or DInt
123
TRUE
"123"
Real
123.0
TRUE
"123.45"
Real
123.45
TRUE
"1.23e-4"
Real
1.23
TRUE
"1.23E-4"
Real
1.23
TRUE
"12,345.67"
Real
12345.67
TRUE
"3.4e39"
Real
3.4
TRUE
"-3.4e39"
Real
-3.4
TRUE
"1.17549e-38"
Real
1.17549
TRUE
"12345"
SInt
0
FALSE
"A123"
N/A
0
FALSE
""
N/A
0
FALSE
"++123"
N/A
0
FALSE
"+-123"
N/A
0
FALSE
Table 9- 32 Examples of S_CONV value to string conversion
Data type
IN value
OUT string
1
ENO
UInt
123
"xxx123"
TRUE
UInt
0
"xxxxx0"
TRUE
UDInt
12345678
"xxx12345678"
TRUE
Real
+9123.456
"xx+9.123456E+3"
TRUE
LReal +9123.4567890123 "xx+9.1234567890123
E+3"
TRUE
Real
-INF
"xxxxxxxxxxxINF"
FALSE
Real
+INF
"xxxxxxxxxxxINF"
FALSE
Real
NaN
"xxxxxxxxxxxNaN"
FALSE
1
The "x" characters represent space characters that fill empty positions in the right-justified field
that is allocated for the converted value.