Siemens SIMATIC S7 System Manual page 248

101BExtended instructions
8.2 String and character
Table 8- 34
Data type
UInt
UInt
UDInt
Real
Real
Real
Table 8- 35
IN string
"123"
"-00456"
"123.45"
"+2345"
"00123AB"
"123"
"-00456"
"+00456"
"123.45"
"123.45"
"123,45"
"123,45"
".00123AB"
"1.23e-4"
"1.23E-4"
"1.23E-4"
"12,345.67"
"12,345.67"
"3.4e39"
"-3.4e39"
"1.1754943e-38"
(and smaller)
"12345"
"A123"
""
"++123"
"+-123"
248
Examples of S_CONV value to string conversion
IN value
123
0
12345678
-INF
+INF
NaN
Examples of STRG_VAL conversion
FORMAT
(W#16#....)
0000
0000
0000
0000
0000
0000
0001
0001
0000
0001
0000
0001
0001
0000
0000
0002
0000
0001
0002
0002
0002
N/A
N/A
N/A
N/A
N/A
OUT string
"123"
"0"
"12345678"
"INF"
"INF"
"NaN"
OUT data type OUT value
Int or DInt 123
Int or DInt -456
Int or DInt 123
Int or DInt 2345
Int or DInt 123
Real 123.0
Real -456.0
Real 456.0
Real 123.45
Real 12345.0
Real 12345.0
Real 123.45
Real 123.0
Real 1.23
Real 1.23
Real 1.23E-4
Real 12345.67
Real 12.345
Real +INF
Real -INF
Real 0.0
SInt 0
N/A 0
N/A 0
N/A 0
N/A 0
System Manual, 11/2011, A5E02486680-05
ENO
TRUE
TRUE
TRUE
FALSE
FALSE
FALSE
ENO
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
TRUE
FALSE
FALSE
FALSE
FALSE
FALSE
S7-1200 Programmable controller