Skip to Content

Register Login

Industry Online Support

Technical Forum

Navigation

Tag read PLC cycle

Created by: DRA(TVL) at: 1/15/2008 9:10 AM (1 Replies)

Rating (0)

Thanks 0

2 Entries

1/15/2008 9:10 AM	Rate (0)
DRA(TVL) Posts: 1 Rating: (0)	Hi everyone, If I'll have an S7 TCP/IP connection and I'll configure and axternal tag. For example: DB100.DBW20 I'll use an outputbox with the above tag and update rate is "On Change" At which point of the PLC cycle is this tag then updated? The PLC programmer writes several times to that DB, but I should read it only at the end of the PLC cycle... Is this possible and how can I do this? Thx Tom
DRA(TVL) Posts: 1 Rating: (0)
Suggestion To thank Quote Answer

1/17/2008 2:24 PM	Rate (0)
April Posts: 1776 Rating: (95)	With the standard kommunikation your intention can not be solved. But you can use AR_Send block for the solution. See FAQ http://support.automation.siemens.com/WW/view/en/23629327 and search for "AR_Send" in the product support April
April Posts: 1776 Rating: (95)
Suggestion To thank Quote Answer

|

Share this page:

Share this page on...

Follow us on