We have two mark vie controllers for Gas turbines. One of the PDIO module failed while GT online and alarmed, Control system fault inhibit. PDIO was showing without any indications.
We removed the load on the machine and while at FSNL, replaced the PDIO with a spare one. The module didn't load even though it is auto configured. We build and downloaded from the HMI. While downloading machine tripped. All the controllers show, input enabled state, not going online.
Tried downloading again, but in vain. Ping shows the controllers are healthy. After a few attempts, Controller came on line.
My question is what is enabled state in Controller and what could be the reason to go in to this state. Any expert advice on this matter??
We removed the load on the machine and while at FSNL, replaced the PDIO with a spare one. The module didn't load even though it is auto configured. We build and downloaded from the HMI. While downloading machine tripped. All the controllers show, input enabled state, not going online.
Tried downloading again, but in vain. Ping shows the controllers are healthy. After a few attempts, Controller came on line.
My question is what is enabled state in Controller and what could be the reason to go in to this state. Any expert advice on this matter??