Unless you know all the hardware configuration required for proper operation and manually entered that before downloading, you have now corrupted your PLC programming.

If you have a backup of the original program, or can get a copy, use that and download that project to the PLC.

Otherwise, you need to contact the engineer who wrote it and get the hardware configuration.  Sometimes this is added to the schematics, so check there and see if you are one of the rare lucky people with a great engineering group.  Note, my group is not one of those great types as we do not usually include that detail in the drawings. Sometimes, but not usually.

mirip

the plant is not working now. How to return to state previous my download so that the plant operates again ?