Siemens Simatic S7 Series System Manual

PLC concepts
4.3 Saving and restoring data
S7-200 SMART
System Manual, 09/2015, A5E03822230-AC
83
Restoring the program from a program transfer memory card
To copy the contents of the program transfer card to the PLC, you must cycle the power to
the CPU with the program transfer card inserted. The CPU then performs the following tasks:
1. Clears RAM
2. Copies the user program, the system block (PLC configuration), and the data block from
the memory card to CPU permanent memory.
While the copy operation is in progress, the STOP and RUN LEDs on the S7-200 SMART
CPU alternately flash. When the S7-200 SMART CPU completes the copy operation, the
LEDs stop flashing.
Note
Program transfer card compatibility
Restoring a program transfer card that you created on a different CPU model might fail due
to the differences in model types. During the restore process, the
CPU validates the
following characteristics of the program content stored on the memory card:
•
Size of program block
•
Size of V memory specified in the data block
•
Quantity of onboard digital I/O configured in the system block (Page 115)
•
Each retentive range that is configured in the system block
•
Expansion module and signal board configurations in the system block
•
Axis of Motion configurations in the system block
•
Forced memory locations
Note
In addition to using a memory card as a program transfer card, you can also create a reset
-
to
-factory-defaults memory card.
See also
Creating a reset-to-factory-defaults memory card (Page 147)

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.