View Full Version : S7 400 program which includes summer/winter time switching
March 25th, 2011, 01:40 AM
Hi, just getting my head around the basics and need to develop a program using a Siemens S7 400 plc, has any one got a copy of a program that I could study and learn from. Need to switch some lights in the program based on time, taking into account summer/winter. Cheers just a newbie.:nerves:
March 25th, 2011, 03:53 AM
Here's a start:
March 25th, 2011, 05:00 AM
Seem to be getting a lot of red, must be doing some thing wrong. Think I have to generate DT values, would love to see a whole working program. Cheers for your help.
March 25th, 2011, 04:45 PM
Example call + DB definition in attached archive.
March 26th, 2011, 06:18 AM
Thanks a million will retrieve it when I'm at work next where I have S7