1/7/2015 9:23 AM | |
Posts: 767 Rating: (69) |
Hi Experts, I wonder to know how can I use OB35_EXC_FREQ parameter at the input of a block in PCS7
|
1/7/2015 10:40 AM | |
Joined: 12/22/2014 Last visit: 10/7/2021 Posts: 173 Rating: (23) |
Yes. in PCS7/CFC always use the S7_sampletime. |
Greetings |
|
1/7/2015 10:59 AM | |
Joined: 1/28/2009 Last visit: 4/1/2024 Posts: 6836 Rating: (1359) |
Please check the following manual carefully,specifically the section related to creating AS Blocks and check the samples: PCS 7 Programming Instructions for Blocks1.4 Time Dependencies Depending on the cyclic interrupt OB in which your block is called, these parameters must be given new values. This makes sure that your block algorithm always operates with the correct time. If you give these parameters the system attribute S7_ sampletime, and set this to 'true', CFC automatically sets the value to match the calling OB. A scan rate is also taken into accoun t. You should also give the parameter the system attributes S7_visible and S7_link and set them to 'false'. The parameter is then invisible and cannot be interconnected in the CFC chart preventing its value being changed accidentally by the user. |
Last edited by: hdhosseini at: 1/7/2015 11:03 AM |
|
1/7/2015 11:35 AM | |
Posts: 767 Rating: (69) |
Thank you very much Jules. Thank you Hamid Very good
|
This contribution was helpful to1 thankful Users |
Follow us on