Siemens PLC

[ranz]

Hi,
One of our old machines is currently down. Some of the built in
I/O's in a S7-200 CPU214 PLC are defective. We need to replace the
PLC, but when i try to upload the program, it is password protected
and i don't know the password and i also don't have a back up
program to down load.
Can any body please tell me if there is anyway i can upload
the program.

Thanks,
Ranz

 

[RGB]

As stated by Preeya in your previous thread on this topic...the only thing you can do is reset the PLC. The program will be lost. However, if the program is on a memory submodule, you can replace the PLC with an identical one and install the memory submodule in it. You may have a hard time finding a 214 though, they were obsoleted a year ago.

 

[ranz]

Rob,
Thanks for the input.Our PLC have no memory submodule.
I think, what i should do now is to find a PLC Expert
who could do a new ladder program base on the sequence
of our machine.

Thanks,
Ranz

 

[format C:]

Below is for SLC500, maybe it would work for Siemens too! Anybody tried?

http://freespace.virgin.net/ian.sullivan/rockwell.htm

Good luck,

F

 

[Lancie1]

ranz,

I would never describe myself as a PLC Expert, but I have had to reconstruct programs without having a copy of the internal ladder logic. It is possible but difficult.

To re-construct the program, what a programmer needs is the most complete description of the machine that it is possible to get. Here are the useful items in the order of usefulness:

1. A disk copy of the original PLC ladder logic program.

2. A paper print-out of the original PLC program.

3. Electrical ladder logic wiring diagrams are very helpful.

4. A list of the PLC Inputs and Outputs is the next most useful item.

5. An Operators Manual, or Maintenance Manual can be some help.

If you would send a description of the machine, how many Inputs and Outputs it has, and so on, I could give you an estimate of how possible it would be to reconstruct the program. [email protected]