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how to interface the GSM unit to the LOGO!?

Created by: LOGO!Barbarian at: 2/8/2011 8:55 AM (3 Replies)

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2/8/2011 8:55 AM	Rate (1)
LOGO!Barbarian Posts: 173 Rating: (95)	justinowens Hi, I'm new to this so hope this is not a stupid question! Am I correct in thinkingthat it is not possible to selectanyoutput to switch based on the number of pulses on a single input? I want toswitch a number of different devices using a Logo!230RC from a GSMunit. This GSM unitonly has a single output butI can pulse it based on the SMS I send it. SoI wouldlike to be able to select which output to switch based on the number of pulses that the controller detects on the input. I can see how to count the pulses, how to switch an output but not how to change the output based on number of pulses. Thanks in Advance! Hey Justin Thanks! This is also something that I would like to do. My current problem is how to interface the GSM unit to the LOGO! If the GSM modem only has a 2.8V output, how are you getting it into the LOGO! 24V or 12V DC inputs so that the LOGO! 'sees' it? Any ideas of getting pulses from the LOGO! relay or transistor outputs back to the modem i.e. from 12V / 24V dc down to 2.8V ?!?!?! Thanks Splitted from Select which relay to switch based on number of pulses on a single input.
LOGO!Barbarian Posts: 173 Rating: (95)	Last edited by: O_Moderator at: 2/8/2011 12:00 PM new subject after splitting
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2/8/2011 12:36 PM	Rate (0)
Marcjan Platinum Member Joined: 4/22/2010 Last visit: 11/18/2024 Posts: 5697 Rating: (715)	Hello Logo!Barbarian, Don't know your electronic skills, but optocouplers will do the job for you. http://www.jaycar.com.au/images_uploaded/optocoup.pdf hope this helps.
	Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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2/8/2011 1:24 PM	Rate (1)
Helmut_13 Posts: 2930 Rating: (432)	Hi, you can also use the AI to detect 2.8V if you have AI's. Regards Helmut
Helmut_13 Posts: 2930 Rating: (432)
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3/5/2011 12:09 AM	Rate (0)
justinowens Posts: 4 Rating: (0)	Hi, I have all that working perfectly now. I am pulsing the output from the GSM unit - this has only low voltage outputs so I am using this to switch a 12V Relay which switches 220V on a single input of the Logo. I am then counting the pulses on the Logo input and depending on number of pulses I am switching an output. Justin
justinowens Posts: 4 Rating: (0)
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