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Digital Thermostat with 3 steps

4/24/2008 8:20 PM	Rate (0)
lp08 Advanced Member Joined: 4/24/2008 Last visit: 10/31/2024 Posts: 7 Rating: (0)	Anyone can help me? I can make a digital thermostat with 3 steps with 3 windows to make the changes in 2 parameters: the ON and the OFF temperature level. I want to switch OFF the 3 steps at the same level and ON in diferent levels and the question is: is it possible to have a common value for the switch OFF? If so we can use only one window to make the all configuration (one window with 1 line for OFF and 3 lines for ON). Best regards, Luis

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4/25/2008 3:00 AM	Rate (0)
rosa Posts: 191 Rating: (58)	Hi!! if you are using the analog threshold trigger, then it is not possible directly, because this function does not allow to use the Reference of another function as a limit.. but you can use a trick and some SR blocks please look at the attachment Hope this helps!! ROSA Attachment temp.zip (796 Downloads)
rosa Posts: 191 Rating: (58)
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4/28/2008 1:43 PM	Rate (0)
lp08 Advanced Member Joined: 4/24/2008 Last visit: 10/31/2024 Posts: 7 Rating: (0)	Many thanks for your reply. I have tested and your example works only if the analog input go to value zero if not ( value 1 or 2) you don't have the changes in block AND (B010, B011 and B012) and you can't do the SET again on RS block. Kind regards, Luis

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4/28/2008 6:15 PM	Rate (0)
rosa Posts: 191 Rating: (58)	Ok!! then try this, and please post if it works.. ROSA Attachment temp.zip (840 Downloads)
rosa Posts: 191 Rating: (58)
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4/28/2008 8:52 PM	Rate (0)
lp08 Advanced Member Joined: 4/24/2008 Last visit: 10/31/2024 Posts: 7 Rating: (0)	Hi! You have forgoten that we only want to change 4 parameters! I think I have done the solution for refrigeration and for heating and if you don't mind you can see if it is correct. Kind regards, Luis Attachment Logo.zip (773 Downloads)

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4/28/2008 9:56 PM	Rate (0)
rosa Posts: 191 Rating: (58)	Hi!! it seems that your solution does what you need.. i hope the programs i sent could help you!! ROSA
rosa Posts: 191 Rating: (58)
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