IMHSS03
IMHSS03中央处理单元(CPU)是PLC的控制中枢。它按照PLC系统程序赋予的功能接收并
存储从编程器输入的用户程序和数据，检查电源、存储器、VO以及警戒定时器的状态，并能诊断用户程序中的语法错误:当PLC投入运行时
首先它以扫描的方式接收现场各输入装置的状态和数据，并分别存入IO映像区，然后从用户程序存储器中逐条读取用户程序，经过命令解释后，按指令的规定将逻辑或算术运算的结果送入Vo映像区或数据寄存
器内。等所有的用户程序执行完毕之后，*将1/O映像区的各输出状态或输出寄存器内
的数据传送到相应的输出装置，如此循环运行，直到停止运行为止。
为了进一步提高PLC的可靠性，近年来对大型PLC还采用双CPU构成冗余系统，或
采用三CPU的表决式系统。这样，即使某个CPU出现故障，整个系统仍能正常运行。. How to deal with abnormal sound or vibration when ABB Robot Servo motor repairs several faults?
Servo wiring:
Check whether the power cable, encoder cable, control cable and cable are damaged; Check whether there is interference source near the control line and whether it is parallel to or too close to the nearby high current power cable; Check whether there is any sudden change in the potential of the grounding terminal to ensure excellent grounding.
Servo parameters:
The servo gain setting is too large, and it is suggested to manually or actively adjust the servo parameters from the beginning; Acknowledge the setting of the time constant of the speed response filter. The initial value is 0, and the set value can be tested to increase; The electronic gear ratio setting is too large, and it is suggested to restore to the factory setting; Resonance of servo system and mechanical system, test and adjust the frequency and amplitude of notch filter.
