Flex IO module reading wrong

CQ21

Member
Join Date
Apr 2021
Location
Columbia
Posts
61
Hi all,

I have a 1794-IT8 module that doesn't seem to be reading the correct values. I have set it up correctly for the appropriate type of thermocouple. I have attached a screenshot of my read words 9 and 10 as well as the write words.

Read 9 = N11:39
Read 10 = N11:40
Write 0 = N11:41...etc

I have configured all channels for type J thermocouple and I'm only using the first 4 channels currently. I've also attached the integer file in decimal for reference. The only thing I've noticed is that bit 7 in read word 10 is true when it should be false by default. Could it just be a dud module? I did buy from ebay...

Screenshot 2021-10-21 102300.png Screenshot 2021-10-21 103159.png
 
Or are you saying the whole card is not working?

swap channels with a known good channel?
Get a heat gun and heat one of the Thermocouples up see if you see any changes on the input words?
 

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