Use logical judgment to calculate equipment working time

[grhsc]

Can this function be implemented using formulas or other methods?

Channel 105 is the power of the motor. When the power < 1kw, we think the motor is stop , and when it > 1kw, we think it is working.

Through this logic, can the working hours of the motor be calculated that day?

thank you

[Mikhail]

Hello,
The related answer is here
If the motor change its state not too often, you can check it every minute and add a channel value if it is on.

[grhsc]

Hi Mikhail, that answer doesn’t seem relevant and I don’t understand C#’s syntax, so could you help me further?

Assume that the motor current is channel 100, and channel 108 is used to save the running status

when the current > 2, it is running, 108=1
Expressed in python , it should be like this

while True:
if channel100 > 2 : channel108 += 1
time.sleep(60)

What should I fill in the formula box?

[grhsc]

I tried some based on the answers on the forum and it seems like this

Val(100)>5.0?Val(108)+1:Val(108)

but not correct

When my data （108）type is int, the data only shows 1 and 0
When the data type is double, its cumulative value is very strange, probably 9 or 10 each time.

[Mikhail]

Hi,
Something like (not tested)

public double CountTime()
{
  return Val(101) > 0 ? Val() + 1 : Val();
}

101 – channel that stores the machine state
Then use this formula in a channel of the Calculated type: EveryMin(() => CountTime())

[grhsc]

thank you, it works

[Mikhail]

Good. This is a common task that many people ask.

[Author]

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