Siemens Simatic S7 Series System Manual

Debugging and troubleshooting
10.2 Displaying program status
S7-200 SMART
458 System Manual, 09/2015, A5E03822230-AC
Example program status in the LAD program editor
The example below shows status in the LAD program editor. The program editor displays the
values of operands and indicates powerflow as each instruction executes during the execute
program phase of a scan cycle.
Example program status in the FBD program editor
The example below shows status in the FBD program editor. The red color of the ADD_I
instruction box indicates errors in the operands.

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.