sparkytex
Lifetime Supporting Member
The mill is down and I cant figure this out!! lucky me. It appears that a 1771 NOC analog card has faulted in some way. I cannot get the card to send out a signal to our valves. I can see in the data table that the HMI is sending 14 mA's out to the valve but for some reason the card is not talking with the PLC or the card is not working. Right now the fault light is flashing on and off. We don't appear to have an exact spare. All we have is a 1771 NOC ser C card which is 0-25 mA not 0-20 mA. Will the 1771 NOC ser C card work in the others place? how would I go about changing it, just pull it out and put the new one in? do I need to do anything with the BTW setup. I need some serious help as I haven't dealt with this before? PLEASE HELP!!