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Alternating two pumps with analoge and digital comand
Created by: Picareto at: 10/1/2019 1:53 AM (5 Replies)
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| 10/1/2019 1:53 AM | |
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Posts: 13 Rating:
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I'm here to ask for help building the Logo 0BA8 Standard program. Thanks in advance for all your help. What I want is to control two submersible electric pumps that will dump a wastewater tank. The command will be given primarily by an ultrasonic sensor (ET) that will measure the height of water in the tank and with a differential of 200mm below 500mm will give the order to individually turn on / off each of the alternating electric pumps.Just turn on a electric pump. at a time unless the 3-minute continuous electric pump limit is reached .... then it gives the order to start the second pump which will be running at the same time as the one already in operation .... they turn off when the tank level drops about 200mm. If the thermal contact of one of the pumps (T1 or T2) is triggered then the program must set the alarm siren (S) and ignore the corresponding electricpump of that contact .....from now on each time there is a start order the program only starts with the other electric pump. If an anomaly occurs in the ultrasonic sensor (ET) then the liquid level will exceed the starting point of the electric pumps and the float switch 2 (F.S2) will be activated. From this moment the system ignores the analog input of the sensor (ET) and it will work with the digital inputs of the float switches. Float switch 2 (F.S2) gives immediate command to turn on one of the pumps in toggle mode. Reaching the level of Float switch 1 (FS1) then turns off the running pump. I want to keep the condition of 3 minutes as maximum individual operating time of the pumps as it happens in the control by the analog sensor. F.S.3 will also start the other pump, so both will be running simultaneously until the liquid level reaches F.S1. There will be an alarm siren on the electrical panel that will beep if any of the thermal contacts of the electric pumps is triggered or if F.S4 is reached. It may sound complicated but it is a common system of two alternating wastewater electricpumps .... in this case the running order is executed by an analog command which is the priority one but as this type of sensor has a shortened life it is important that I guarantee an alternative system with float switches. I will leave an attachment with the analog sensor datasheet and a small drawing. If in doubt I will be at your disposal to clarify. Thank you very much. AttachmentEASYTREK SP-500.pdf (453 Downloads) |
Last edited by: Picareto at: 10/01/2019 02:07:50Last edited by: Picareto at: 10/01/2019 02:10:36 |
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| 10/1/2019 2:04 AM | |
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Posts: 13 Rating:
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In an attached file here is the hand drawing I made ... |
| 10/2/2019 6:05 PM | |
Joined: 12/18/2014 Last visit: 11/2/2024 Posts: 34124 Rating:
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Here is a program proposal. Look, if everything is right. Since you have not written how the digital signals in the LOGO! come, I have realized it as I think it is right. This is the second, complete program that I have created for you. AttachmentPump_control_0BA8.Standard.zip (511 Downloads) |
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