Hi
One of our Siemens S7-400 PLCs lost power and the backup batteries were dead. On resumption of power, once the Program was downloaded,
All the cards are giving the following messages in Diagnostic buffer,
Communication error, faulty module, external error.
The card status is okay in diagnostics, see attached.
Can someone help in pointing out what could be the problem.
One of our Siemens S7-400 PLCs lost power and the backup batteries were dead. On resumption of power, once the Program was downloaded,
All the cards are giving the following messages in Diagnostic buffer,
Communication error, faulty module, external error.
The card status is okay in diagnostics, see attached.
Can someone help in pointing out what could be the problem.