G Morris

I am trying to read a data block, I have removed Optimized Block Access, the block isnot protected. The firmware is V2.1. I am using the C# implementation and the length of the data received needs to >= 25 but it is only 19 bytes. The date/time also fails but I understand that this is a known issue with this PLC. Where can I find the details of the protocol so I can try and understand the data being sent / received. Much appreciated Module Type Name : CPU 1512SP-1 PN Serial Number : S C-M3E321252020...

I am trying to read a data block, I have removed Optimized Block Access, the block isnot protected. The firmware is V2.1. I am using the C# implementation and the length of the data received needs to >= 25 but it is only 19 bytes. The date/time also fails but I understand that this is a known issue with this PLC. Where can I find the details of the protocol so I can try and understand the data being sent / received. Muc appreciated