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Hello.

rick.fronda11

The remaining is just to add clock in this program to calculate the load check for the pumps.

Can any one help me please to complete my program.

What exactly are you asking for this Forum? Are you asking which instruction to use or are you hoping someone makes the program for you?

BR

rick.fronda11

I have programmed a PLC CPU S7-1200, 6ES7 214-1HG40-0XB0 using TIA Portal,

The concept that I have implemented is to run 4 pumps.

P1, P2, P3, P4

1) The P1 is running between 3 to 4 bar. (Is is happening in my program)

2) But when the pressure drops to 2 bar, P1 gets off as the pressure decreases from 2 bar & then any 2 Pumps among P1,P2,P3 start based on load check and then cutoff at 5 bar. (It is happening in my program)

same cyclic process should be like this every time between 2 and 5 bar for Pump 2, 3 & 4 and pump 1 always runs & cuttoff between 3 and 4 bar. If Pump 2 or Pump 3 or Pump 4 any one will be tripped then remaining 2 should always run between 2 to 5 bar. For Example pump 2 is tripped then 3 and 4 should run every time until the rectification of pump 2. (Is is happening in my program)

The remaining is just to add clock in this program to calculate the load check for the pumps.

Can any one help me please to complete my program.

Dear Rick, i tried to check through your project.

1. You stated in your write-up that pumps starting is to be determined by current preset pressure in bar. You have done your scaling MD20 stores your pressure value.

2. following your write-up your maximum pressure is 5 bar.. i think... but in your scaling it shows 16 while the minimum is 0.

3. Why using analog input IW64 for all your comparator... have you forgotten your real scale value? MD20. IW64, is your raw analog value not your scaled value.

4. In FC 2, I believe you are using the counter  CTU to count the number of times the pumps starts. you didn't talk about counter in your explanation.

5. The whole program is a bit confusing...

6. Your tags are not properly defined. what is tag_2, tag_4, tag_7... for simplicity your tags need to be properly defined.

7. YOUR QUESTION.

The remaining is just to add clock in this program to calculate the load check for the pumps.

Can any one help me please to complete my program.

ANSWER

If you are required to do any calculation in your project... kindly make use of math instructions.

CONCLUSION

Try to make changes to the above points. If you have any other question, i believe the forum is open for you!

Hope this helps.

Success.

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What are you doing manually?  Be very precise in your reply.

Are you doing something at specific times of day?

How are you setting the clock on the PLC?  How accurate does the PLC clock need to be?

Are you for example, at say 1200 are you storing the loads on each pump?

Time of Day interrupts allow you to schedule actions or calculations based on time-of-day.  Problem solved if you need to perform actions at specific times of the day. 

rick.fronda11

You can check the function of this program. Its working fine. I am dealing with clocks manually, this is part i need to do automatically. Rest everything is fine. 

500 = 2 bar = any 2 pumps from P2, P3, P4 will started

2500 = 5 bar = pumps from P2, P3, P4 will be off

1000 = 3 bar = P1 will be started

2000 = 4 bar = P1 will be off

and pumps p2 p3 p4 are also shifting based on load check. You can check from the video.