Special memory (SM) and system symbol names
D.28 SMB1100-SMB1399: EM (expansion module) hardware/firmware ID
S7-200 SMART
System Manual, V2.3, 07/2017, A5E03822230-AF
827
SMB1100-SMB1399: EM (expansion module) hardware/firmware ID
The CPU writes expansion module information to special memory after a power-up or warm
restart transition. The SMB1100-SMB1399 section of special memory is read-only.
EM bus Slot 0 vendor ID: 0x002A if a Siemens EM is present; 0x0000 if no EM is present
SMB1102 to SMB1121 EM bus Slot 0 order ID (MLFB): ASCII characters, left-justified in field, padded with spaces
EM bus slot 0 serial number: ASCII characters, left-justified in field, padded with spaces
SMW1138 EM bus slot 0 hardware version: represents the hardware E-stand; range = 0x0001 to 0xFFFD
0x0000, 0xFFFE, and 0xFFFF are reserved values.
SMD1140 EM bus slot 0 firmware version:
• Byte 0: ASCII ‘V’;
• Byte 1: Functional version,
• Byte 2: Minor change version,
• Byte 3: Bug fix version
EM bus slot 0 firmware version counter (range 0x0000 to 0x00FF)
EM bus slot 0 device type: I/O=0x0003, communications=0x0004, all other values reserved
EM bus slot 1 vendor ID: 0x002A if a Siemens EM is present; 0x0000 if no EM is present
EM bus slot 1 order ID (MLFB): ASCII characters, left-justified in field, padded with spaces
EM bus slot 1: serial number: ASCII characters, left-justified in field, padded with spaces
SMW1188 EM bus slot 1 hardware version: Represents the hardware E-stand; range=0x0001 to 0xFFFD
0x0000, 0xFFFE, and 0xFFFF are reserved values.
SMD1190 EM bus slot 1 firmware version:
• Byte 0: ASCII ‘V’
• Byte 1: Functional version
• Byte 2: Minor change version
• Byte 3: Bug fix version
EM bus slot 1 firmware version counter (range 0x0000 to 0x00FF)
EM bus slot 1 device type: I/O=0x0003, communications=0x0004, all other values reserved
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