How to solve the failure of the DCS system we maintain? The DCS card manufacturer of Zhejiang University Central Control will answer your questions!
The fault light of the main control card flashes. When the configuration, communication and other links of the system have faults, the main control card will self diagnose these faults, and at the same time, the fault light will flash in different ways to indicate different fault phenomena.
All card fault lights of a cage flash. This happens when the address of the data forwarding card is incorrect, the data forwarding card fails, the configuration information of the data forwarding card is wrong, the SBUS line communication of the cage fails, or the power supply for the cage has a low voltage fault, and the data of the entire cage does not refresh or becomes zero.
The method to judge the fault point is to use the "replacement method". First, replace a data transfer card and make it work. Observe whether the system returns to normal (be careful not to set the address of the data transfer card incorrectly during replacement). If the system is still abnormal, you need to contact the supplier.
A card fault light flashes or all data on the card is zero. The possible reasons are that the configuration information is wrong, the card is in standby state and the redundant terminal connection line is not connected, the card itself is faulty, and there is no configuration information in this slot. The "replacement method" can be used when other possibilities are eliminated and the card fault is suspected.
The data of a channel is abnormal. In this case, the maintenance engineer needs to accurately determine whether the fault point is at the system side or the field side. The simple processing method is to disconnect the signal line, use a multimeter and other measuring tools to check whether the on-site signal is normal or send a standard signal to the system to see whether the monitoring screen display is normal.
If it is preliminarily determined that the fault point is at the system side, then the fault point shall be determined in the order of channel, card, cage and control station from small to large. For various types of control station cards, there are various reasons for data failure or distortion of a channel.
For example, for current input, it is necessary to judge whether the card works, whether the configuration is correct, whether the jumper of power distribution mode and the polarity of signal wire are correct. The maintenance personnel should correctly judge the location of the fault point and then deal with it accordingly. Come to our website for more information http://www.sdjkyqyb.com Ask about it!