3/7/2019 8:12 AM | |
Posts: 5 Rating: (0) |
Hello, I have a problem in step 7 programming. I made a simple FC of start, latch and stop program. I have call two FC in OB1 with each input/output values of DB1 and Db2 respectively. But when I high input of anyone FC , the output of both FCs get high. I have check the FCs on simple I0.0 and q4.0 then it works fine. problem occur when I use DB addresses like db1.dbx0.0 Kindly help. ------------------------------------------------------------------------------------------ |
Last edited by: Jen_Moderator at: 3/7/2019 11:16:32 AMNew subject after splitting |
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3/8/2019 7:18 AM | |
Joined: 12/9/2010 Last visit: 10/8/2022 Posts: 623 Rating: (77) |
Hi basit1990, Pl share the PLC program. |
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This contribution was helpful to1 thankful Users |
3/11/2019 11:32 AM | |
Posts: 66 Rating: (1) |
Attach your program dear |
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4/10/2019 7:00 PM | |
Posts: 5 Rating: (0) |
Both FCs output gets high if I high start input of any FC.. Please find attached program Attachmentstartstop.zip (81 Downloads) |
4/11/2019 3:59 AM | |
Joined: 10/7/2005 Last visit: 9/22/2024 Posts: 3021 Rating: (1054)
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Hello basit1990 your problem is caused by doing read access to the "Lamp" OUT parameter inside the FC. Solution: Change the "Lamp" parameter to an IN_OUT and it will work. More details on why this problem only surfaces when you assign a DB variable to the FC's "LAMP" OUT parameter is available in THIS thread. |
Cheers |
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This contribution was helpful to1 thankful Users |
4/11/2019 7:22 PM | |
Posts: 5 Rating: (0) |
Thankyou. I have checked the program and problem solve by taking In-Out variable.. |
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