Thank you very much IO_Rack.
It seems that Rockwell has removed the firmware of 1756-L55 rev. 15.56 out, I could not find from the link.
Can anyone share alternative ways?
Can I find a Link download for the old Rockwell firmware of 1756-L55 rev. 15.56 ? or
Can anyone share the firmware with me?
Please help!!!
Thank you very much.