Calculated Channel computing current minimum value of multiple channels

[rapidscadaaks]

Hi

Please assist for making a formula to calculate minimum value of current date of several channels.

I excel, one would have used min(aa:xx)

Thanks in advance

[rapidscadaaks]

Hi

Please assist for making a formula to calculate minimum value of current date of several channels.

I excel, one would have used min(aa:xx)

Thanks in advance

[rapidscadaaks]

Hi

I used formula below in a calculated channel and it did not work:

Min(Val(1601),Val(1602),Val(1603))

Server returned following error:

2025-09-08 09:16:30 [SCADA][SCADA$][ERR] Error compiling the source code of the scripts and formulas:
(929,53): error CS1501: No overload for method ‘Min’ takes 3 arguments
Check the source code in Z:\SCADA\ScadaServer\Log\CalcEngine.cs
2025-09-08 09:16:30 [SCADA][SCADA$][ERR] Normal execution is impossible

Please help

Thanks in advance

[rapidscadaaks]

Found a solution by using following script

public double GetMinValue(params int[] channelNumbers)
{
if (channelNumbers == null || channelNumbers.Length == 0)
return double.NaN;

double minVal = double.MaxValue;

foreach (int cnlNum in channelNumbers)
{
minVal = Math.Min(minVal, Val(cnlNum));
}

return minVal;
}

[Mikhail]

Hi,
Creating formulas is a development service and is outside the scope of support. If you have a specific question about the syntax or features of formulas, please ask.

[Mikhail]

Note that is is not efficient to pass an array as a function argument. Because a new array is created each iteration.
It’s better to make a function like

public double GetMinValue(int cnl1, int cnl2, int cnl3)
{
...
}

[rapidscadaaks]

Noted Mikhail.

Thanks

[Author]

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