Siemens Simatic S7 Series System Manual

Program instructions
7.5 Convert
S7-200 SMART
System Manual, 09/2015, A5E03822230-AC
209
Integer to string conversion
LAD / FBD
STL
Description
ITS IN, OUT, FMT
The Integer to String instruction converts an integer word IN to an ASCII
string with a length of 8 characters. The format (FMT) assigns the conver-
sion precision to the right of the decimal, and whether the decimal point is
to be shown as a comma or a period. The resulting string is written to 9
consecutive bytes starting at OUT.
Non-fatal error conditions with ENO = 0
SM bits affected
• 0006H indirect address
• 0091H operand out of range
• Illegal format (nnn > 5)
• FMT bit is not zero for the four most signif-
icant bits of the FMT byte
None
Input / output
Data type
Operand
IN INT IW, QW, VW, MW, SMW, SW, T, C, LW, AC, AIW, *VD, *LD, *AC, Con-
stant
FMT
BYTE
IB, QB, VB, MB, SMB, SB, LB, AC, *VD, *LD, *AC, Constant
OUT
STRING
VB, LB, *VD, *LD, *AC
The length of the output string is always 8 characters. The number of digits to the right of the
decimal point in the output buffer is assigned by the nnn field. The valid range of the nnn
field is 0 to 5. If you assign 0 digits to the right of the decimal point, then the value is
converted without a decimal point. For values of nnn greater than 5, the output is a string of
8 ASCII space characters. The c bit specifies the use of either a comma (c=1) or a decimal
point (c=0) as the separator between whole number and fraction. The most significant 4 bits
of the format must be zero.
The following figure also shows examples of values that are formatted using a decimal point
(c= 0) with three digits to the right of the decimal point (nnn = 011). The value at OUT is the
length of the string stored in the next byte addresses.
FMT parameter for the integer to string instruction

Siemens Simatic S7 Series Specifications

General

CPU	Varies by model (e.g., S7-300, S7-400, S7-1200, S7-1500)
Communication Interfaces	PROFIBUS, PROFINET, Ethernet, MPI
Programming	TIA Portal, STEP 7
Programming Languages	LAD, FBD, STL, SCL, GRAPH
I/O Modules	Digital, Analog, Specialty modules available
Operating Temperature	0°C to 60°C (standard models)
Mounting	DIN rail mounting
Operating Voltage	24V DC or 120/230V AC (varies by model)
Protection Class	IP20 (standard models)
Memory	Varies depending on the S7 model. Includes work memory (RAM) for program execution, load memory (EEPROM or Flash) for program storage, and system memory for operating system functions. Memory sizes range from kilobytes to megabytes.