RELANCE 45C992 伺服驱动器

硬件故障改如何检查?

硬件故障常常表现为以下几方面

模块的插件板与总线底板插接不严密;

拨码开关错误;通讯线接线方向错误;

终端匹配器未接;

硬件跳线与实际信号要求的类型不一致;

机柜内系统电源、现场电源输出有误;

硬件本身坏。

以上几方面问题的结果表现为：

加电后硬件板极故障(指示灯显示状态不对);

设备不工作;

系统工作但显示的对应测点值不正确、系统的输出不能驱动现场设备等等。

什么是通讯协议?

通信协议是指通信双方的一种约定。约定包括对数据格式、同步方式、传送速度、传送步骤、检纠错方式以及控制字符定义等问题做出统一规定，通信双方必须共同遵守。因此，也叫做通信控制规程，或称传输控制规程，它属于ISO'SOSI七层参考模型中的数据链路层。和利时支持ProfiBus、FF、CanOpen、Lonworks等

2、现场信号出现问题如何办?

现场信号的问题主要有以下几个方面

测量元件坏;

变送器故障;

连线问题，包括信号线接反、松动、脱落、传输过程中接地及传输过程中受干扰影响耦合出超出系统可以接受的干扰等等。

总之，从信号测量、发送，到MACS接线端子，这中间任何一个环节出错，所造成的结果都表现为数据显示有误。

After a malfunction occurs, the fault maintenance system should undergo passive maintenance, mainly including the following tasks: 3.3.1 Professional maintenance generally requires the manufacturer or a maintenance engineer designated by the manufacturer to carry out maintenance.

 General Maintenance of Users The daily maintenance carried out by the system users themselves should have a certain understanding of the technical difficulty and operability of system maintenance, understand the maintenance tools that should be available, clarify which tasks can be completed on their own, and have a clear understanding. If problems arise, feasible maintenance plans should be formulated in a timely manner. The key to maintaining DCS system faults is to quickly and accurately determine the location of the fault point. Some experiences in fault maintenance can be summarized as follows:

During the major overhaul, the DCS system should be thoroughly maintained, including

(1) System power outage maintenance, including thorough dust cleaning, wiring modification, and other related tasks.

(2) For problems discovered during daily inspections and regular inspections that cannot be resolved in a timely manner, centralized handling should be carried out, such as system upgrades, configuration downloads, etc.

(3) Before maintenance, the system should backup the DCS system configuration and upload and backup the system operating parameters (such as PID).

(4) During the maintenance period, when changing the configuration, control, and interlocking program, it is necessary to organize responsible persons for process, equipment, electrical, and instrumentation to jointly participate in interlocking debugging and form interlocking debugging records.

The software loading and unloading test is normal, and the communication port and manual operation station are working properly. 3) Various analog and switch input and output channels are working normally. 4) Load the testing software and ensure normal operation for no less than 48 hours. 5) Switching test of redundant modules. 6) After inspection, an inspection record should be filled out and a qualified mark should be affixed.

Conclusion: For the maintenance work of DCS system, the key is to prioritize prevention. As system maintenance personnel, they should develop scientific, reasonable, and feasible maintenance strategies and methods based on system configuration and production equipment control, achieve close coordination between preventive maintenance and daily maintenance, and carry out systematic, planned, and regular maintenance to ensure that the system operates well in the required environment for a long time, ensuring smooth production process control Stable operation, providing reliable assurance for achieving production and efficiency goals