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DO blink one by one

Created by: Alis7freak at: 2/22/2011 10:37 AM (6 Replies)

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2/22/2011 10:37 AM	Rate (0)
Alis7freak Posts: 12 Rating: (0)	Dear All, I want to create a logic for blinking of digital outputs of cpu-313 one by one. like for example q0.0 on for 1 sec then q0.1 on for 1 sec then q0.2 on for 1 sec and so on. after the last DO is ON, again the DO q0.0 should be ON and the chain should start again. I am successful in making this logic using timers and comparaters but i want to make it more compact as it takes lot of memory usage. If you guys have any good logic/idea then do reply to my post as this logic will enable all of us for I/O simulation. Waiting for interesting replies. Regards Ali Asgar
Alis7freak Posts: 12 Rating: (0)
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2/22/2011 11:20 AM	Rate (0)
Aret Posts: 2348 Rating: (262)	Few ideas: 1) Take a look on cyclic rotation instruction (CCRA or something like) 2) Take a look on indirect addressing - you can start with memory indirect addressing. -------------------- Generally task looks like a test task - in this case you should make it by yourself
Aret Posts: 2348 Rating: (262)
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2/22/2011 11:35 AM	Rate (0)
Alis7freak Posts: 12 Rating: (0)	i have done a lot of hands on STL for memory indirect addressing. I am getting system fault when i download the program. if you or any of your friend has a logic available then please mail me or post it here
Alis7freak Posts: 12 Rating: (0)
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2/22/2011 12:02 PM	Rate (0)
Chilly_Garfield Posts: 316 Rating: (37)	Hi Alis, to decrement your programm you can use cyclic interrupt OBs (OB30 to OB38) to cut down the timer. In your case you can use OB32(1s interrupt). Then you can use the SH* or Ro* functions. ( * "L"(left) or R(right) ) If you use SH* function you have to compare the byte, word or dword for the last bit and reset the variable(Output) to the start value.
Chilly_Garfield Posts: 316 Rating: (37)
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2/22/2011 12:35 PM	Rate (0)
Marcjan Platinum Expert Joined: 4/22/2010 Last visit: 12/15/2022 Posts: 5697 Rating: (708)	Little example in FBD, using 1 counter and a SHL_W instruction. M50.1 is a 0.2sec clockpuls, you can use bit 5 for your purpose. Attachment FC2.pdf (70 Downloads)
	Last edited by: Marcjan at: 2/22/2011 5:28 PM another update Last edited by: Marcjan at: 2/22/2011 4:27 PM updated attachment Last edited by: Marcjan at: 2/22/2011 12:46 PM Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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2/24/2011 11:15 AM	Rate (0)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 9/25/2023 Posts: 6822 Rating: (1349)	Alis7freak I want to create a logic for blinking of digital outputs of cpu-313 one by one. like for example q0.0 on for 1 sec then q0.1 on for 1 sec then q0.2 on for 1 sec and so on. after the last DO is ON, again the DO q0.0 should be ON and the chain should start again. I am successful in making this logic using timers and comparaters but i want to make it more compact as it takes lot of memory usage. Dear Ali Asgar This is the response you wanted in your private message.It is a draft piece of program which can be improved by yourself to suit your requirements. Also check tha attachment for analysis. [code] L #BYTE1 L 1 <I JCN ST T #BYTE1 //M0.5 CPU clock merker 500ms ST: A M 0.5 FP #FLANK1 = M 1.0 NOP 0 A M 1.0 JCN STR L #BYTE1 SLW 1 T #BYTE1 T QB 0 STR: NOP 0 L #BYTE1 T QB 0[/code] I hope this helps hdhosseini Attachment BLINK.zip (84 Downloads)
	Last edited by: hdhosseini at: 2/24/2011 11:19 AM Last edited by: hdhosseini at: 09/27/2019 01:15:32 Demo Channel on Youtube
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2/25/2011 3:21 PM	Rate (0)
bit7 Experienced Member Joined: 7/26/2008 Last visit: 9/28/2023 Posts: 93 Rating: (18)	Hi Hosseini, I wrote a little program in ladder since that is what most prefer. The program can pulse any bit string in QD0 with the mask as selection. Use it don't use it! Attachment Forum_Shift.zip (55 Downloads)

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