ceilingwalker
Lifetime Supporting Member
Hello all. Been a very long time since I have had to work on a Siemens PLC and I can't remember whether I can use my TIA portal or my STEP7 for an S7-300. It only has a serial port. My other question is, when I upload the program, will it be like the old SLC and PLC5's where my upload won't have any descriptions or anything, since I don't have the original program? It has a CPU312. Thanks much.