SiePortal

The integrated platform for your product selection, buying and support workflow - bringing together Industry Mall and Online Support.

Products & Services
- Menu temporary not available
- Menue temporary not available
- {{item.title}}
Support Support
{{(apiData.Support | filter:{'rank':1}:true)[0].title}} Support
- Menu temporary not available
- Menue temporary not available
- {{item.title}}
MySiePortal MySiePortal
{{(apiData.MySiePortal | filter:{'rank':1}:true)[0].title}} MySiePortal
- Menu temporary not available
- Menue temporary not available
- {{item.title}}
Cart ({{apiData.CartCount}})

Navigation

Searching a way to build a 64bit floating point in S7-200

1/14/2009 9:46 AM	Rate (0)
Robster Gold Member Joined: 5/28/2008 Last visit: 9/5/2025 Posts: 1344 Rating: (141)	Hi all, I have a very difficult challenge. I have to calculate a decimal number in a double precision floating point number in IEEE754 standard. S7200 only works on 32bit single precision. So I have to build a data area with pointer in format: 1 bit sign 11 bit exponent 52 bit fraction Now I have to enter a decimal number and calculate bit to bit and write it in the pointer. But I don't know how? Anybody an idea or is something else exists already? Many thanks

Suggestion To thank Quote Answer

1/19/2009 2:09 PM	Rate (0)
Darius Platinum Expert Joined: 9/28/2005 Last visit: 7/24/2025 Posts: 2957 Rating: (243)	Hello, I had some problem, but I need to conver from 64-bit to 32-bit. Look at this topic /tf/WW/en/Posts/22788 Maybe now you have some idea how to do it in reverse way.
	Best regards, Darius
Suggestion To thank Quote Answer

1/19/2009 2:34 PM	Rate (0)
Robster Gold Member Joined: 5/28/2008 Last visit: 9/5/2025 Posts: 1344 Rating: (141)	Hi Darius, thank you very much for answer. Unfortunately, the link is not the answer for my problem. At the moment Iworked outa small part of a solution. So I have to calculate bit to bit and shift bits around in two DWORDS. It's not my favourit work . Many mathmatics and a lot of networks and bits... So, we'll see whats coming out at the end.

Suggestion To thank Quote Answer

1/19/2009 2:51 PM	Rate (0)
Darius Platinum Expert Joined: 9/28/2005 Last visit: 7/24/2025 Posts: 2957 Rating: (243)	There is very nice mathematics library for S7-300, but nothing for S7-200, so you could create one for S7-200 if you succeed in your current work . Good luck to you !
	Best regards, Darius
Suggestion To thank Quote Answer

Share this page:

Share this page on...