PLC, contactor and wiring migrate/upgrading advice

[FranzPLC]

Hi,

I am new in project engineering and my previous work is PLC programming only. For experienced engineers, what are the step by step procedure that you use in migrating/upgrading and what are the things that I will avoid?

[RussB]

More detail as to what you are upgrading/migrating from and to would be helpful and likely get you more useful results.

Edited February 8, 2017 by RussB

[FranzPLC]

the PLC is siemens s5 to s7-300 and we will provide new HMI. We will also change the old contactors and rewire the panel