Siemens Simatic S7 Series System Manual

Special memory (SM) and system symbol names
D.28 SMB1100-SMB1399: EM (expansion module) hardware/firmware ID
S7-200 SMART
690 System Manual, 09/2015, A5E03822230-AC
SM addresses for slot 3
Description
SMW1250 EM bus slot 3 vendor ID: Set to 0x002A if a Siemens EM is present and 0x0000 if no EM is
present
SMB1252 to SMB1271 EM bus slot 3 order ID (MLFB): ASCII characters, left-justified in field, padded with spaces
SMB1272 to SMB1287
EM bus slot 3 serial number: ASCII characters, left-justified in field, padded with spaces
SMW1288 EM bus slot 3 hardware version: Represents the hardware E-stand; range = 0x0001 to
0xFFFD (0x0000, 0xFFFE, and 0xFFFF are reserved values)
SMD1290 EM bus slot 3 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)
SMW1294
EM bus slot 3 firmware version counter (range 0x0000 to 0x00FF)
SMW1296
Reserved, always 0x0000
SMW1298
EM bus slot 3 device type: I/O=0x0003, communications=0x0004, all other values reserved
SM addresses for slot 4
Description
SMW1300 EM bus slot 4 vendor ID: Set to 0x002A if a Siemens EM is present and 0x0000 if no EM is
present
SMB1302 to SMB1321
EM bus slot 4 order ID (MLFB): ASCII characters, left-justified in field, padded with spaces
SMB1322 to SMB1327
EM bus slot 4 serial number: ASCII characters, left-justified in field, padded with spaces
SMW1338 EM bus slot 4 hardware version: Represents the hardware E-stand; range = 0x0001 to
0xFFFD (0x0000, 0xFFFE, and 0xFFFF are reserved values)
SMD1340 EM bus slot 4 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)
SMW1344
EM bus slot 4 firmware version counter (range 0x0000 to 0x00FF)
SMW1346
Reserved, always 0x0000
SMW1348
EM bus slot 4 device type: I/O=0x0003, communications=0x0004, all other values reserved
SM addresses for slot 5
Description
SMW1350 EM bus slot 5 vendor ID: Set to 0x002A if a Siemens EM is present and 0x0000 if no EM is
present
SMB1352 to SMB1371
EM bus slot 5 order ID (MLFB): ASCII characters, left-justified in field, padded with spaces
SMB1372 to SMB1387
EM bus slot 5 serial number: ASCII characters, left-justified in field, padded with spaces
SMW1388 EM bus slot 5 hardware version: Represents the hardware E-stand; range = 0x0001 to
0xFFFD (0x0000, 0xFFFE, and 0xFFFF are reserved values)
SMD1390 EM bus slot 5 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)
SMW1394
EM bus slot 5 firmware version counter (range 0x0000 to 0x00FF)
SMW1396
Reserved, always 0x0000
SMW1398
EM bus slot 5 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.