Air drier Mitsubishi programm

bayeibrahima · Aug 17, 2011

Hello specialists
I've tried to write a programm simulating air drier (resistance temperature is read by a temperature sensor and a contactor move the resistance to a desired value K180 for example; once the desired value is reached two valves are opened alternately by intervalls of time for example K500.I use FX0N plc)
Can you tell me if the code is correct on the attached file?
Hope to read you soon. Best regards

iant · Aug 18, 2011

hi Ibrahima
Your first rung is incorrect
T0 Normally Closed to TO coil is wrong

i am about to send you some more info.

iant · Aug 18, 2011

this is the setup for analogue
the last line MUL - converts the raw data
D60 will be a value from 0~4000

bayeibrahima · Aug 19, 2011

Oh Thank you Ian
I see that there are some points that I've not understood yet
Let me look at again on the docs you sent to me instead of asking again for silly questions
Sincerely I don't understand the line: MUL D60 K8 D60
With my best regards

iant · Aug 20, 2011

the last line is used by the program I coppied the rung from
it takes D60 value Multiplys it by 8 and stores it back into D60

You do not need this line and can delete it

bayeibrahima · Aug 21, 2011

ok thank you Ian
then only the four lines are concerned by the analog value processing? there's no operations for data scaling?
Best regards

iant · Aug 22, 2011

you need to do calculations for scaling
the best hint I can give you is convert to a fraction.
eg.
0~4000 to percentage 0-100.0
= 1000/4000
= 1/4
therefore
4000/4 = 1000 or 100.0 on your display

another - 0~4000 to 2500 PSI
2500/4000
= 25/40
= 5/8

therefore
4000 x 5 = 20000
20000/8 = 2500

Air drier Mitsubishi programm

bayeibrahima

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