How to solve the READ_NUA_DDT Function Block that stops updating the BMENUA0100 status variable after a swap over from Primary to Standby on a M580 redundant system
Issue :
The READ_NUA_DDT function block stops updating the value of the T_BMENUA0100 variable in a M580 hot standby/redundant system when swapping the Primary and Standby role of the 2 CPUs.
Product Line :
Control Expert
M580 hotstandby
BMENUA0100
Cause :
This is caused by the fact that the data of the management table of the READ_DDT block found inside the READ_NUA_DDT dfb is part of the data that is exchanged between both CPU. This might cause this block to stop operating when a swap occurs. It is explained in the help file of the block
Resolution :
To fix this, we need to disable the Exchange on STBY option for the instances of the READ_NUA_DDT blocks like shown below :
發佈於: 施耐德電機Taiwan
需要協助？
產品選型工具
快速輕鬆地為您的應用找到合適的產品和附件。
取得報價
立即線上提交您的銷售需求，專業團隊將主動聯繫您。
購買地點
輕鬆在您所在地區找到最近的施耐德電機經銷商。
支援中心
在同一位置找到滿足您所有需求的支援資源。