Siemens Simatic S7 Series System Manual

Program instructions
7.13 Program control
S7-200 SMART
System Manual, 09/2015, A5E03822230-AC
301
Example: FOR-NEXT loop
LAD
STL
When I2.0 is ON, the outside
loop (Network 1 - 4) is exe-
cuted 100 times.
Network 1
LD I2.0
FOR VW100, +1,
+100
The inside loop (Network 2 -
3) is executed twice for each
execution of the outside loop
when I2.1 is on.
Network 2
LD I2.1
FOR VW225, +1, +2
End of inside loop
Network 3
NEXT
End of outside loop
Network 4
NEXT
7.13.2
JMP (jump to label)
You can use the JMP (Jump) instruction in the main program, in subroutines, or in interrupt
routines. The JMP and its corresponding LBL (Label) instruction must be located within the
same program segment either in the main program, a subroutine, or an interrupt routine.
Note
You cannot jump from the main program to a label in either a subroutine or an interrupt
routine. Likewise, you cannot jump from a subroutine or interrupt routine to a label outside
that subroutine or interrupt routine.
You can use a Jump instruction within an SCR program segment, but the corresponding
Label instruction must be located within
the same SCR program segment.

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.