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Why do I sometimes have apparently differing unit values if setting a parameter from another parameter?

Irrespective of any engineering units or decimal points applied to a given parameter, the PL/X treats the parameter as a pure number with signing as far as the MMI is concerned. As an example if you wanted to set 342)UIP4 CAL RATIO (which has four decimal places and no engineering units) from 310)DIP1 IP HI VALUE (which has two decimal places and is expressed in %), strip the decimal point and ignore the units in order to arrive at the required value. In other words, if you wanted 342)UIP4 CAL RATIO to have a value of -1.0000, 310)DIP1 IP HI VALUE would need to be set to -100.00%.

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