Smb6: Cpu Id Register; Special Memory Byte Smb6; Smb7: Reserved - Siemens SIMATIC S7-200 System Manual

Special Memory (SM) Bits

SMB6: CPU ID Register

As described in Table C-7, SMB6 is the CPU identification register. SM6.4 to
SM6.7 identify the type of CPU. SM6.0 to SM6.3 are reserved for future use.
Table C-7

Special Memory Byte SMB6

SM Bits
Format
SM6.4 to
SM6.7
SM6.0 to
SM6.3

SMB7: Reserved

SMB7 is reserved for future use.
C-4
Description (Read Only)
MSB
7
x x x x r r r
xxxx = 0000 = CPU 212/CPU 222
0010 = CPU 214/CPU 224
0110 = CPU 221
1000 = CPU 215
1001 = CPU 216/CPU 226
Reserved
LSB
0
CPU ID register
r
S7-200 Programmable Controller System Manual
A5E00066097-02