Re: simplest manner of sampling from mult. inputs to produce one value

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Comments:: Leon, : Thank you very much for your time and response, it is greatly appreciated. : Happy New Year, : Ken : : It is simpler if you work on a channel of 16-bits. In your case we can work on 16-bit and leave the last two inputs using your method, which is not wrong, just tideous to input. : : What you need to know is that you can use the Exclusive OR operator ^ to filter out which bit of the variable has changed state. We have to store the last bit pattern of INPUT[1] using a DM[1]. Then we can apply the logical operation INPUT[1] ^ DM[1]. If any bit in INPUT[1] becomes different from DM[1] the result is non-zero, and we will then test each bit to find out which one has changed state. After identifying the bit that has changed state, we can then test the INPUT[1] variable at that bit position to find out if it has changed from ON to OFF or OFF to ON and act accordingly. : : You need to construct a custom function that continuously monitor the state of INPUT[1] vs DM[1]: : : Norm.ON Fn_#1 : : |-----||--------------{dCusF} : : Within the Fn_#1, enter the following codes: : : IF INPUT[1]=DM[1] RETURN ' DM[1] store the last state of INPUT[1] : : ENDIF ' if no change then ignore. : : DM[10] = INPUT[1] ^ DM[1] ' get the bits that has changed state : : FOR I = 0 TO 15 : : IF TESTBIT(DM[10],I) ' BIT I HAS CHANGED STATE : : IF TESTBIT(INPUT[1],I) ' BIT I has been turned ON. : : X = X + Y ' increment X by Y : : ELSE : : X = X - Y ' decrement X by Y : : ENDIF : : ENDIF : : NEXT : : DM[1] = INPUT[1] ' store the state of INPUT[1] : : I will email a sample program to you so that you can test the outcome using the simulator. : : : : : I have started working with your product and like it very much. I have run into a problem that I am sure can be solved much easier than the route that I have currently taken. The situation is this. I have 18 different input switches that control 18 different outputs directly. What I am trying to do is to use a custom function in parallel on each circuit to increase integer x by a value y when on and subtract when off. The manner that I have been able to do it is with a seperate relay and 2 custom functions for each of the circuits for a total of 54 different items. : : : Thanks in advance, : : : Ken

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