Siemens SIMATIC S7 System Manual page 828

Special memory (SM) and system symbol names
D.28 SMB1100-SMB1399: EM (expansion module) hardware/firmware ID
SM addresses for slot 2
SMW1200
SMB1202 to SMB1221
SMB1222 to SMB1237
SMW1238
SMD1240
SMW1244
SMW1246
SMW1248
SM addresses for slot 3
SMW1250
SMB1252 to SMB1271
SMB1272 to SMB1287
SMW1288
SMD1290
SMW1294
SMW1296
SMW1298
828
Description
EM bus slot 2 vendor ID: 0x002A if a Siemens EM is present; 0x0000 if no EM is present
EM bus slot 2 order ID (MLFB): ASCII characters, left-justified in field, padded with spaces
EM bus slot 2 serial number: ASCII characters, left-justified in field, padded with spaces
EM bus slot 2 hardware version: Represents the hardware E-stand; range = 0x0001 to
0xFFFD
0x0000, 0xFFFE, and 0xFFFF are reserved values.
EM bus slot 2 firmware version:
Byte 0: ASCII 'V'
•
Byte 1: Functional version
•
Byte 2: Minor change version
•
Byte 3: Bug fix version
•
EM bus slot 2 firmware version counter (range 0x0000 to 0x00FF)
Reserved, always 0x0000
EM bus slot 2 device type: I/O=0x0003, communications=0x0004, all other values reserved
Description
EM bus slot 3 vendor ID: 0x002A if a Siemens EM is present; 0x0000 if no EM is present
EM bus slot 3 order ID (MLFB): ASCII characters, left-justified in field, padded with spaces
EM bus slot 3 serial number: ASCII characters, left-justified in field, padded with spaces
EM bus slot 3 hardware version: Represents the hardware E-stand; range = 0x0001 to
0xFFFD
0x0000, 0xFFFE, and 0xFFFF are reserved values.
EM bus slot 3 firmware version:
Byte 0: ASCII 'V'
•
Byte 1: Functional version
•
Byte 2: Minor change version
•
Byte 3: Bug fix version
•
EM bus slot 3 firmware version counter (range 0x0000 to 0x00FF)
Reserved, always 0x0000
EM bus slot 3 device type: I/O=0x0003, communications=0x0004, all other values reserved
System Manual, V2.3, 07/2017, A5E03822230-AF
S7-200 SMART