If you use the controller solely to monitor the embedded application server (the typical case), configuring the controller to accept requests only from "this computer" is the best approach.
A wide range of vacuum switches are offered to monitor and provide output to integrate with the system controller.
一个真空开关是提供广泛的监测和提供输出,以便与系统控制器。
3
The system is composed of three subsystems, they are the signal monitor subsystem, the PLC (the Programmable Logical Controller) one and the host computer control ore.