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Our newest 3.8" operator interface touchscreen with built-in PLC.

FT1A Touch 12 i/o analog problem? Messages in this topic - RSS

Posts: 39

5 years ago I built a product using the FT1A Touch 12i/o.. I quickly noticed that there was a discrepancy in the analog input. Being 10bit its basically 10mv/step with 10v being 1000 steps. On the top-side @10v it gave me a value of 998 or 999 however on the bottom-side @500mv it gave me a value of 35 (thats a whole 150mv off!). Oddly enough when I activate one of the 10A relays the voltage on the analog jumps a bit lower. Back then since it wasnt critical I just programmed around the problem. Now i have another project and this plc/hmi combo would fit the bill nicely but I dont know if this problem has been addressed yet.
edited by RT on 5/3/2019
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