Scaling changes with 1794-IT8 over Ethernet to L81

phuz

Member
Join Date
Jun 2008
Location
Mohnton, PA
Posts
1,044
Just commissioned two new skids for a customer. Each has a 1794 chassis over Ethernet back to an L81. The second module of each chassis is a 1794-IT8 and each has 3 Type J thermocouples. The temperatures we are measuring are around 30C, so the raw input from the module normally shows 300. What has happened now is that these readings will increase by a factor of 10 to ~3000. This occurs on all three thermocouples on both 1794-IT6 modules. The TCs are Type J and the module is set for Type J. Not much configuration in these, so what could possibly cause the resolution to increase that much? CJCs are installed. TB3T bases are used.
 
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