Freelance SCADA functionality needed
This is a typical SCADA functionality. Today we have trend function blocks, but they are limited to 200 points, far from the 4320 requested.
Any suggestion ?
In freelance with trend acquisition block in long-term Archive “In each archiving cycle, a maximum of 200 process values with time stamp from the process station are transferred to the long term archive”. Also in trend acquisition block “the acquisition time is the same as the task cycle time”. Information’s available in doc -3BDD011932R0101, page H-5 under section H 1.
Hence let say I have task cycle time 500ms then in 20 second 8000 process values can be transferred to long term archive.
i.e 20 sec = 20,000 ms if I divide by task cycle(500 ms) then value comes out 40,
Hence in 20 sec there is 40 acquisition cycles so total (40 x 200) = 8000 process values with time stamp can be archived in freelance, If I am not bad with calculations ;) theoretically it sounds like 8000 process values can be archived in 20 sec with trend acquisition block with 500 ms task cycle. Which is far more then 4320.
In such case Freelance – DCS covers functionality of SCADA !!!