Siemens Simatic S7 Series System Manual

Program instructions
7.5 Convert
S7-200 SMART
System Manual, 09/2015, A5E03822230-AC
201
Examples: I_DI, DI_R, and BCD_I
LAD STL
Convert inches to centimeters:
1. Load a counter value (inches) into
AC1 (ex. C10=101).
2. Convert the value to a real number
(ex. VD0=101.0).
3. Multiply by 2.54 to convert to centi-
meters
(ex. VD4=2.54, VD8=256.54).
4. Convert the value back to an integer
(ex. VD12=257).
Network 1
LD I0.0
ITD C10, AC1
DTR AC1, VD0
MOVR VD0, VD8
*R VD4, VD8
ROUND VD8, VD12
Convert a BCD value to an integer (ex.
AC0=1234, execute BCD_I, then
AC0=04D2).
Network 2
LD I0.3
BCDI AC0
See also
Assigning a constant value for instructions
See also
Assigning a constant value for instructions (Page 69)

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.