The information security service grade of industrial system is divided into three grades: Grade I, Grade II and Grade III, of which Grade I is the highest and Grade III is the lowest.
* * * is divided into eight different directions, namely: security integration, security operation and maintenance, emergency response, risk assessment, disaster backup and recovery, security software development, network security audit and industrial control system security.
You can apply for the corresponding direction according to your business needs. Usually, we consider networking the control system, mainly linking networking with the field bus.
The influential fieldbus systems in the control field include FF, LonWorks, Profibus, CAN, HART and RS485 bus networks. The unified standard (FF) formulated by Fieldbus Foundation, its slow bus standard Hl has been adopted as the international standard, and its high-speed bus standard H2 is still being formulated.
However, due to commercial profits, technology monopoly and other reasons, fieldbus products are still in a situation of blooming, which has a negative impact on reducing system costs and expanding application scope.