OneManShow
Member
I have 14 Type J thermocouples wired to 3 Controllogix 1756-IT6 modules. Originally all modules using the default configuration. All wired channels appeared to be approx. 40 Degrees low. This is based on the heaters being off and the extruder at room temperature for weeks (there are no manual temp gauges).
I've worked for SI's since the earlier 90's but I'm relatively new at the compact/controllogix platform and thermocouple modules in general. With my experience I've always seemed to get the projects on the legacy controllers as the youngsters don't know them. And when it has came to temperature I've mainly used RTD modules, which when setup right report a temp with one implied decimal. I would think the thermo module would be the same.
I can change the numbers in the scaling and get it close to what I think it should be. But, I don't know if it is linear or right when heated up. But I don't think this is a proper solution to a perceived module setup issue.
Anyway, I know this is a lot of babble. But any help in getting this right would be appreciated. Again, the only info the customer is giving me on these thermocouples is they are type J.
I've worked for SI's since the earlier 90's but I'm relatively new at the compact/controllogix platform and thermocouple modules in general. With my experience I've always seemed to get the projects on the legacy controllers as the youngsters don't know them. And when it has came to temperature I've mainly used RTD modules, which when setup right report a temp with one implied decimal. I would think the thermo module would be the same.
I can change the numbers in the scaling and get it close to what I think it should be. But, I don't know if it is linear or right when heated up. But I don't think this is a proper solution to a perceived module setup issue.
Anyway, I know this is a lot of babble. But any help in getting this right would be appreciated. Again, the only info the customer is giving me on these thermocouples is they are type J.