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+--- Thread: FAN Coil Control (/showthread.php?tid=4593)
FAN Coil Control - mkaymak - 21.02.2023
Hi Admin ;
I'm using KNX switch acuators to control FCU in a project.Each fan coil has three fan stages.
My customer wants an additional PID control.KNX termostats do the PID works on itself outputs in percintiles.
The problem is there is 81 FCU on field and i'm writing 5 scripts for every fancoil ( for on/off status , fan status , auto status and selecting the right fan step with PID output.) There is 553 event script on Logic Machine i know it's not efficient.
Logic machine CPU I/O values are 1.38 / 1.35 / 1.49 and connected KNX bus over IP router , group monitor calculated 28.9 telegrams per second.
What is the best approach for controlling these FCU for you ?
Code:
value = event.getvalue()
oto = grp.getvalue('24/0/22')
heat1 = grp.getvalue('24/0/20')
if ( oto == true ) and ( heat1 == true ) and ( value > 0 ) and ( value <= 33 ) then
grp.write('24/0/45', 9)
end
if ( oto == true ) and ( heat1 == true ) and ( value > 33 ) and ( value <= 66 ) then
grp.write('24/0/45', 10)
end
if ( oto == true ) and ( heat1 == true ) and ( value > 66 ) then
grp.write('24/0/45', 11)
end
if ( oto == true ) and ( heat1 == true ) and ( value == 0 ) then
grp.write('24/0/45', 8)
endRE: FAN Coil Control - Daniel - 21.02.2023
I think you just asking LM for too much and should spread this logic over more LMs.