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What is problem in logic?

Created by: McAlex at: 12/14/2021 2:08 PM (5 Replies)

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12/14/2021 2:08 PM	Rate (0)
McAlex Advanced Member Joined: 7/15/2017 Last visit: 6/19/2025 Posts: 57 Rating: (1)	Hello all members, I uploaded program from controller in step 7 and found there some problem. It's look like this: CALL FC 61 Call <- marked as red (error) BLD 3 = L 24.0 CDB OPN DI 42 TAR2 LD 20 LAR2 P#DBX 0.0 UC FB 42 LAR2 LD 20 CDB BLD 4 End Call <- marked as red (error) CALL FB 41 , DB41 CALL FB 43 , DB43 CALL FB 99 , DB99 What is a problem in this. I suspect that it could be some error that possibly could make calling to some block I suspect that it should be changed to call OB 100 (as I have such function block). What do you think could be problem in? PLC is running fine

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12/14/2021 2:30 PM	Rate (0)
jacek d Platinum Expert Joined: 9/23/2005 Last visit: 9/12/2025 Posts: 5116 Rating: (768)	Link
	Regards, Jacek What is confusing you is the fact that you never see a number but always its digit representation. So you end up thinking that the number is the representation. - Andrej Bauer Any claims against me - based on whatever legal reason - resulting from the use of any code and/or ideas presented on this forum shall be excluded. #StayWithUkraine
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12/14/2021 2:43 PM	Rate (0)
McAlex Advanced Member Joined: 7/15/2017 Last visit: 6/19/2025 Posts: 57 Rating: (1)	I'm confused with error that on the picture. But I uploaded this program from plc and there should not be any error. End I wonder what does it mean in Call - End Call commands? More over, when I touched this block everything stopped and nothing working! I need now some help Attachment Error.jpg (618 Downloads)
	Last edited by: McAlex at: 12/14/2021 14:43:49 Last edited by: McAlex at: 12/14/2021 14:47:16
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12/14/2021 2:59 PM	Rate (0)
McAlex Advanced Member Joined: 7/15/2017 Last visit: 6/19/2025 Posts: 57 Rating: (1)	I've read yout link but I don't understand how to return back to working situation

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12/14/2021 3:07 PM	Rate (0)
McAlex Advanced Member Joined: 7/15/2017 Last visit: 6/19/2025 Posts: 57 Rating: (1)	I found in help instruction Help topic · For expanded block calls, delete the whole call sequence (all instructions within the BLD commands in brackets including the red CALL / END_CALL lines) and enter the call again. · For incorrectly selected block calls, place the cursor in the CALL line and select the menu command Edit > Call > Update. This updates the block call to match the new interface. After you have updated the block call, check the new assignment of the parameters. But what I should write in call? I understand that I need to write call FB42 (but what DB?)

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12/14/2021 3:25 PM	Rate (0)
McAlex Advanced Member Joined: 7/15/2017 Last visit: 6/19/2025 Posts: 57 Rating: (1)	Ok, I understood, I need to write: CALL FB42 , DB42

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