Warranty, Liability and Support
Time switch based on the S7-300/400 CPUs with simple HMI system
including radio-controlled clock connection
Rev. B - final 19.07.2002 17/84
Copyright © Siemens AG Fehler! Unbekannter Name für
Dokument-Eigenschaft. All rights reserved
BID21669756_Zeitschaltuhr_einfach_DOKU_v20_e.doc
2. Program controlled changeover:
The system time is being adjusted at the officially fixed dates by
means of a function block which is included in this application.
• Holiday/special day recognition:
Data for holidays and special days are stored in a DB in the format
day/month/year. The block checks whether a day in this DB coincides
with this current date, and sets an output to 1. Otherwise, the output is 0.
To Next Page
Loading...
