Siemens Simatic S7 Series System Manual

Special memory (SM) and system symbol names
D.26 SMB1000-SMB1049: CPU hardware/firmware ID
S7-200 SMART
688 System Manual, 09/2015, A5E03822230-AC
D.26
SMB1000-SMB1049: CPU hardware/firmware ID
This CPU information is written to special memory after a power-up or warm restart
transition. The SMB1000-SMB1049 section of special memory is read-only.
SM address
Description
SMW1000
CPU vendor ID: (always 0x002A)
SMB1002 to SMB1021 CPU order ID (MLFB): ASCII characters, left-justified in field, padded with spaces
SMB1022 to SMB1037
CPU serial number: ASCII characters, left-justified in field, padded with spaces
SMW1038 CPU hardware version: Represents the hardware E-stand; range = 0x0001 to 0xFFFD
(0x0000, 0xFFFE, and 0xFFFF are reserved values)
SMD1040 CPU firmware version: Byte 0 is ASCII ‘V’; byte 1=functional version; byte 2=minor change
version; byte 3=bug fix version (range of bytes 1-3 = 0x00 to 0xFF)
SMW1044
CPU firmware version counter (range 0x0000 to 0x00FF)
SMW1046
Reserved: Always 0x0000
SMW1048
CPU device type: Always 0x0001
D.27
SMB1050-SMB1099: SB (signal board) hardware/firmware ID
This signal board information is written to special memory after a power-up or warm restart
transition. The SMB1050-SMB1099 section of special memory is read-only.
SM address
Description
SMW1050 Signal board vendor ID: Set to 0x002A if a Siemens SB is present and 0x0000 if no SB is pre-
sent
SMB1052 to SMB1071
Signal board order ID (MLFB): ASCII characters, left-justified in field, padded with spaces
SMB1072 to SMB1087
Signal board serial number: ASCII characters, left-justified in field, padded with spaces
SMW1088 Signal board hardware version: Represents the hardware E-stand; range=0x0001 to 0xFFFD,
(0x0000, 0xFFFE, and 0xFFFF are reserved values)
SMD1090 Signal board firmware version; Byte 0 is ASCII ‘V’; byte 1=functional version; byte 2=minor
change version; byte 3=bug fix version (range of bytes 1-3 = 0x00 to 0xFF)
SMW1094
Signal board firmware version counter (range 0x0000 to 0x00FF)
SMW1096
Reserved, always 0x0000
SMW1098 Signal board device type: I/O=0x0003, communications=0x0004, all other values reserved

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.