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logo 8 program for switching two pumps alternately
Created by: AutoGen_954300 at: 1/22/2015 11:49 AM (3 Replies)
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| 1/22/2015 11:49 AM | |
Joined: 1/22/2015 Last visit: 1/23/2015 Posts: 2 Rating:
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hi, What functional blocks can help me switch two pumps alternately. ATTACHED IS PART OF THE PROGRAM. Albert. |
| 1/22/2015 11:55 AM | |
Joined: 12/18/2014 Last visit: 1/16/2021 Posts: 20931 Rating:
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Hi, there's no attachment. |
| 1/22/2015 4:31 PM | |
Joined: 5/27/2011 Last visit: 9/2/2020 Posts: 47 Rating:
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This is how I normally do it (see attached diagram). The inputs I1 - I4 are float switches. HH (top) = high level alarm H = start pumps L = stop pumps LL = low level alarm Float switches H and L operate a latching relay (B029): H sets the relay and L resets it. B001 (on delay) is a delay that triggers an alarm after 15 seconds if the float switch has not dropped (to check if the pump is really running). B002 (pulse relay) selects the pump that will run. If the output = 1, pump 1 will run, if the output = 0, pump 2 will run. Hope this helps. AttachmentLOGO_Soft_Comfort__-_DCA_Westmalle.pdf (143 Downloads) |
| 1/23/2015 7:34 AM | |
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Joined: 1/22/2015 Last visit: 1/23/2015 Posts: 2 Rating:
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Thanks it helped. |
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