Siemens Simatic S7 Series System Manual

Debugging and troubleshooting
10.1 Debugging your program
S7-200 SMART
454 System Manual, 09/2015, A5E03822230-AC
10.1.2
Cross reference table
Note
You must compile your program in order to view the cross reference table.
Use the cross reference table when you want to know whether a symbolic name or memory
assignment is already in use in your program, and where it is used. The cross reference
table identifies all operands used in the program, and identifies the POU, network or line
location, and instruction context of the operand each time it is used. Double-clicking an
element in the cross-reference table displays that part of your POU.
Element
refers to the operands used in your program. You can use the toggle button to
toggle between symbolic and absolute addressing to change the representation of all
operands.
●
Block
refers to the POU where the operand is used.
●
Location
refers to the line or network where the operand is used.
●
Context
refers to the program instruction where the operand is used.

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.