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A quick question from a newbee

Created by: chopstics at: 12/21/2012 12:50 AM (7 Replies)

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12/21/2012 12:50 AM	Rate (0)
chopstics Posts: 8 Rating: (0)	How come i dont get the DO light on ? If i press the 'modify to 1' it comes on.. but not when i make the input go 'high' by giving 24 on the DI pin (and the light turns green on the DI card) im sure its just a small thing.. (but im just a newbee...) Attachment example.jpg (124 Downloads)
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12/21/2012 7:20 AM	Rate (0)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 1/8/2025 Posts: 6858 Rating: (1366)	chopstics How come i dont get the DO light on ? If i press the 'modify to 1' it comes on.. but not when i make the input go 'high' by giving 24 on the DI pin (and the light turns green on the DI card) im sure its just a small thing.. (but im just a newbee...) Hello, As far as I know,When a digital input (or any binary value) is written to digital output,it may not be modified to a fix value because controller's operting system overwrite the mentioned value to the address.Like the following code.For permanent writing a fix value on a DO, it is possible to use force. [code]A I0.0 =Q0.0[/code] My conclusion, If you can modify the DO and it is not taking any action by changing digital input signal assigned to it in logic, check your code to be properly downloaded to CPU. Other cases are possible,more information needed to find exact reason. Best regards Hamid Hosseini
	Demo Channel on Youtube
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12/21/2012 7:21 AM	Rate (0)
Marcjan Platinum Expert Joined: 4/22/2010 Last visit: 12/13/2024 Posts: 5697 Rating: (715)	Hello, Could also be your wiring is wrong or you have the wrong input adress in the program. First thing you must check yourself, fot the second thing whe need a printscreen of the hardware config. What is the partnumber of your PLC? Regards, Marcjan
	Last edited by: Marcjan at: 12/21/2012 7:26 AM Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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12/21/2012 12:15 PM	Rate (0)
chopstics Posts: 8 Rating: (0)	Here is a pic of the HW config. All should be ok in my mind, everything came up default like this, even the IO cards, adresses also. I know it shoule be the right adress, since i can see the correct green light come on when i force the ouput high in the program ('modify to 1'). Program should have been loaded ok also i think, but how to verify? My guess is that im missing some config somewhere. (?) In the Module Information everyting seems ok also, no errors there: "Module available and o.k." And when i go 'online' to monitor the system, and i make an input active, should i be able to see the input adress in the STL go green og change colour or something ? im just guessing i should, but i dont see it... Attachment HWconfig.jpg (108 Downloads)
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12/22/2012 7:49 PM	Rate (0)
chopstics Posts: 8 Rating: (0)	Nobody have a clue for me ? Here is also a pic of the monitoring.. i put 24v on the first input adress 124.0, so i would think that either Q124.0 or Q124.1 also would be 'on' ... right ? is the program running ? it should be, correct? any hints would be apriciated.. :) Attachment online.jpg (116 Downloads)
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12/22/2012 10:59 PM	Rate (0)
falki Bronze Member Joined: 1/8/2008 Last visit: 5/14/2024 Posts: 264 Rating: (45)	Hi chopstics, look at the bottom left in your picture : "The statements are not being processed." Do you call the FB1 (in OB1) ?

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12/23/2012 12:44 AM	Rate (0)
chopstics Posts: 8 Rating: (0)	THANK YOU that small sentence changed it all for me :):) now i know it all works good, so i can continue to test more next will be to try to connect a PT 100 to the analog input pin 11-13. hope it will not be so many pits to fall into this time.. :)
chopstics Posts: 8 Rating: (0)
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12/24/2012 8:20 PM	Rate (0)
Marcjan Platinum Expert Joined: 4/22/2010 Last visit: 12/13/2024 Posts: 5697 Rating: (715)	Hello, I think the first pit is the connection, have a look at the manual, you can see at page 277, the PT100 must be connected at Pin 14 & 15. You have still the 313C is it? Regards, Marcjan
	Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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