I am having trouble understanding the parity bit configuration for AEXT. I got from the manual that we are specifying the bit at which the parity bit will be sent (e.g. $IN[777]) . But then the manual states that for Odd parity the input is negative value, 0 if it is not to be evaluated and positive for even parity. If I set it to 0 it states error when displaying the AEXT signals is this correct? Also if I want odd parity on $IN[777] do I enter -777 as the value?
Automatic External Parity Bit
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dexterv -
January 4, 2019 at 8:30 AM -
Thread is marked as Resolved.
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Correct. You can look into the P00.src in the folder \tp, search for "parity" and you will see how it works.
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-777 value means using $IN[777] and odd parity
777 value means using $IN[777] and even parity
0 value means not using parity (which is common these days, usually one uses reflection to monitor ALL bits).