IS200SCTTG1A
IS200SCTTG1A
IS200SCTTG1A
that the programmable controller is directly applied to the industrial environment, it must have a strong anti-interference ability, a wide range of adaptability and application. This is also different from the general microcomputer control system an important feature.
It should be emphasized that the programmable controller is qualitatively different from the drum and mechanical sequential controller described in the past. Due to the introduction of a new generation of electronic devices such as microprocessor and semiconductor memory, PLC and the specified instructions for programming, can be modified flexibly, that is to use software to achieve the purpose of “programmable”
1. Analog instrument control system: analog instrument control system dominated in the 1960s and 1970s. Its significant disadvantage is that the analog signal has low accuracy and is susceptible to interference.
2. Centralized digital control system: Centralized digital control system dominated in the 1970s and 1980s. The MCU, PLC, SLC or microcomputer are used as the controller, and the digital signal is transmitted inside the
