nmhandberg
Member
So i have a 1746-NT8 thermocouple for a conveyor furnace that is causing some problems. When the CPU is in run mode the channel 6 LED flashes, but the other channels are fine. When looking at the HMI it gives good temp readings on everything except for Zone 7 (which would relate to the flashing channel 6 LED due to there being a 0 channel) which is reading ~6000 degrees Celsius. We tried to replace with another 1746-NT8 thermocouple but the same exact problem persisted but this time with channel 0 and 1 flashing and the HMI showing Zone 1 and 2 temps ~6000 degrees Celsius. I am positive the wiring is correct on both.
When running online i get the error shown on the attached image (the thermocouple is in Slot 7 as the error reads).
I would like to note that the thermocouple with the two flashing channels may have experienced water damage from a leak in our cooling process in the furnace. The one with the one flashing channel has experienced no damage as far as i am aware as it was pulled from a spare SLC 500 chassis we had in our store room.
From what it seems to me it is a hardware error of the thermocouple modules but wanted to post here to see if anyone can give me their opinion.
I have attached the .rss file we are using in case it would come in handy.
Thanks,
Nick
When running online i get the error shown on the attached image (the thermocouple is in Slot 7 as the error reads).
I would like to note that the thermocouple with the two flashing channels may have experienced water damage from a leak in our cooling process in the furnace. The one with the one flashing channel has experienced no damage as far as i am aware as it was pulled from a spare SLC 500 chassis we had in our store room.
From what it seems to me it is a hardware error of the thermocouple modules but wanted to post here to see if anyone can give me their opinion.
I have attached the .rss file we are using in case it would come in handy.
Thanks,
Nick
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