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TON (SFB4) Interface for SCL

Created by: axelz at: 8/22/2007 1:42 PM (4 Replies)

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8/22/2007 1:42 PM	Rate (0)
axelz Posts: 5 Rating: (0)	Hi all, does anyone know how to use SFB4 (TON) in SCL correct? If I insert the empty interface, I get [code]TON.DBxxx( IN := ,PT := ); := DBxxx.Q; := DBxxx.ET; [/code] Why TON.DBxxx - does it mean I need to define an instance DB? I'm actually trying to create a function or function block for later usage in CFC, which does not allow me to assign a certain DB number into the function. Thanks Axel
axelz Posts: 5 Rating: (0)
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8/22/2007 3:02 PM	Rate (0)
Wizard Diamond Member Joined: 4/24/2006 Last visit: 9/15/2025 Posts: 9027 Rating: (1199)	Hi, The SFB4 needs a Datablock Perhaps the following faq will be helpful: http://support.automation.siemens.com/WW/view/en/18723826 Best regards, Wizard

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8/23/2007 9:30 AM	Rate (0)
dande74 Bronze Member Joined: 2/5/2007 Last visit: 9/9/2023 Posts: 101 Rating: (11)	Here's a part from a SCL source where you can see how I use a TON in a SCL FB. Regards -- Daniel [code]VAR fbTON : SFB4; END_VAR fbTON(IN := true, PT := T#2500ms ); IF fbTON.Q THEN fbTON(IN := false); nCaseStep := 30; END_IF; [/code]

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8/23/2007 11:06 AM	Rate (0)
axelz Posts: 5 Rating: (0)	Thanks dande74 - this was exactly what I was looking for. Test on the 400 CPU is outstanding but I'm pretty sure it works. Any idea where this "interfacing" is described in the SCL manual? Thanks Axel
axelz Posts: 5 Rating: (0)
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8/23/2007 12:21 PM	Rate (0)
dande74 Bronze Member Joined: 2/5/2007 Last visit: 9/9/2023 Posts: 101 Rating: (11)	You are welcome... No, I "guessed" from the knowledge of Beckhoffs TwinCAT which I have programmed rather much. The only thing I could notfirgure out and got help with on this forum with was how to declare the TON function.

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