Download problem to AB DTAM Plus 2707-V40P2

[smccontrols 0]

Hi, I have a problem whereby I cannot download a program to the AB DTAM Plus HMI. Actually I have 2 of these units and the same problem with both. There is no problem up loading the original program from either unit but when I go to download the program, the PC begins to down load but then gives a communications errror.(basically I can upload from the HMIs but cannot even send its own original program back down). Now if I create a new file I can transfer it to the units without any problem or comms error. Does anyone know what might be causing this? Regards SMC

[Stupidav 1]

I have seen this before, and was not able to find out what or why the problem occured. The only thing that I was able to do is print the program and rewrite it. Even though it looked identical to the original I didn't have any problems after that. The only thing that I could think of was that the program was originally created with a different version of the software than you are currently using, or even the Spectrum Controls version of the software.

[nighthawk 1]

Sounds to me like one of the Comms driver ICs has failed. I would say you need a repair. That's my job. Jimmy