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Logo! New to PLC need advice on a task

Created by: aidan5192 at: 1/11/2022 4:43 PM (4 Replies)

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1/11/2022 4:43 PM	Rate (0)
aidan5192 Posts: 3 Rating: (0)	Hi i have recently been studying PLC for work and i have had a task now which i believe i am close to finishing but i cannot think how to correct my problem. Any help would be much appreciated. I need to run the mixing tank for 10 seconds and then empty the tank after but i can only manage to get them both to come on at the same time but i need the empty tank to come on after the 10 seconds. I cant see where i am going wrong as i have tried several ways and i just end up braking the rest of the circuit. This is what i have been given if anyone could see a solution to my problem or let me know if i am way off. • When the Start ‘push to make’ (not toggle) switch (I1) is pressed/released and gets latched on (B1: RS latch), the start ‘fill’ pump (Q1) will be energized and the tank will start to fill. • The pulses generated by flow meter 1 (B5: pulse generator) should be used to increment the counter (B6: Up/down). Tank level full is when the counter function on = 10 and tank low level is when counter off = 1. These values can be used as feedback to control the pumps (instead of the high/low level sensors shown above) and can be called the ‘tank high/low level count indicator’ (Q5 or use a flag M1) • When the full liquid level in the tank is sensed by the tank high/low level count indicator (Q5), the fill pump will be shut-off and the FULL light (Q2) on the control panel is to be energized. • When the tank is full, start the mixer (Q3) and run for 10 seconds (B8: off-delay timer). • When the 10 seconds has expired, stop the mixer (Q3) and start ‘empty’ pump P3 (Q4). • Pump 3 (Q4) will be required to run until the tank is empty. Tank empty can be detected using the low-level sensor (I3). • The pulses generated by flow meter 3 (B15) should be used to decrement the counter (B6: Up/down). Tank empty can be detected by the high/low level count indicator (Q5 or use a flag M1) to switch off the pump • When the stop button (I2) is operated, the process must stop immediately (Q1, Q3, Q4). Attachment Task Logo.png (603 Downloads)
aidan5192 Posts: 3 Rating: (0)
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1/11/2022 5:03 PM	Rate (0)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 12/31/2025 Posts: 36386 Rating: (4545)	It reads like an exercise for a trainee or an exam.

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1/11/2022 5:23 PM	Rate (0)
aidan5192 Posts: 3 Rating: (0)	yes it is an exercise i was given ( not an exam) , im not asking for someone to do it for me , just bit of advice where i have gone wrong that is all
aidan5192 Posts: 3 Rating: (0)
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1/11/2022 6:45 PM	Rate (0)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 12/31/2025 Posts: 36386 Rating: (4545)	Maybe this helps you. That's how I would solve it. Attachment Pump_control_0BA8.Standard.zip (667 Downloads)

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This contribution was helpful to 1 thankful Users aidan5192

1/12/2022 12:08 AM	Rate (0)
aidan5192 Posts: 3 Rating: (0)	Thanks i have found where i went wrong now, i forgot to include inverters. thanks for the help much appreciated
aidan5192 Posts: 3 Rating: (0)
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This contribution was helpful to 1 thankful Users ixo65

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Logo! New to PLC need advice on a task

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Logo! New to PLC need advice on a task

Created by: aidan5192 at: 1/11/2022 4:43 PM (4 Replies)

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5 Entries

aidan5192

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