Date & Time in S7 300 & Ifix 3.5

I am using a S7 300 CPU on an ethernet network. Intellusion Ifix is used as the scada.
The PLC code deals with some batch times and dates.
The SCADA reads the times and dates as number into its data base.
I am trying to convert the numbers to display as times and dates again.

I believe I read somewhere the siemens date starts on 01-01-2001.
I do not know the format of the time.

Can you guide me to any information on this subject.

regards Trerank

The Siemens DATE_AND_TIME format comprises 8 Bytes. The Bytes are used as follows:

Byte Contents
0 Year
1 Month
2 Date
3 Hours
4 Minutes
5 Seconds
6 The two most significant digits of the ms count
7 Bits 4 - 7 The least signicant digit of the ms count
7 Bits 0 - 3 Day of the week 1 = Sunday, 2 = Monday, etc.

Valid entrie lie between 01.01.1990-0:00 and 31.12.2089-23:59:59:999 (If I remember correctly)

By the way I'm not sure as I don't have the documentation on this PC, but I believe the values are BCD coded, no doubt somebody else can confirm this.

Thanks for the info, yes the data is BCD.