(1) an integrated 24V power supply can be connected directly to the sensor and transmitter actuators, CPU 221 and CPU222 has a 180mA output. CPU224 output 280mA, CPU 226, CPU 226XM 400mA output can be used as load power supply. (2) high-speed pulse output has a two-way high-speed pulse output, the output pulse frequency up to 20KHz, for controlling stepper motor or servo motor to achieve positioning tasks. (3) communication ports CPU 221, CPU222 and CPU224 has an RS-485 communication port. CPU 226, CPU 226XM has two RS-485 communication port. Support PPI, MPI communication protocol, there are free port communication capability. (4) analog potentiometers CPU221 / 222 has an analog potentiometer, CPU224 / 226 / 226XM has two analog potentiometers. Analog potentiometer to change the special register (SMB28, SMB29) values ??in order to change the parameters of the program is running. As a control parameter timers, counter preset value, the amount of process. (5) allows the interrupt input at breakneck speed on the rising edge of the process signal response. (6) EEPROM memory module (optional) can be used as tools to modify and copy the program quickly, without programming and can be aided software archiving. (7) of the battery module user data (such as the flag state, the data blocks, timers, counters) by super capacitor inside the store about five days. Optional battery module can extend the storage time to 200 days (10 year life). The battery module is inserted in the memory module slot. (8) different device types CPU 221 ~ 226 have two types of CPU, having different power supply and control voltage. (9) digital input / output points CPU 221 has six inputs and four outputs; CPU 222 has 8 inputs and 6 outputs; CPU 224 has 14 inputs and 10 outputs; CPU226 / 226XM has 24 inputs and 16 outputs. Input CPU22X host for bidirectional optocoupler 24V dc input circuit, the output relays and DC (MOS-type) of two types. (10) high-speed counter CPU 221/222 30KHz has four high-speed counters, CPU224 / 226 / 226XM with high-speed counters 6 30KHz for capturing faster than the CPU scan frequency pulse signal.