你说的是IM151-8系列的cpu
比如这个
6ES7 151-8AB01-0AB0
Work memory 192KB; 0.06ms/1000 instructions; PROFINET connection; S7 communication (loadable FBs/FCs); PROFINET IO-Controller; supports RT/IRT; PROFINET interface and 3 ports; MRP; PROFINET CBA; PROFINET CBA-Proxy; transport protocol TCP/IP, UDP and ISO on TCP; data record routing; firmware V3.2; expansion with a maximum of 63 modules of the ET200S range