Hello,
Our machines are using B&R's Temperature Input Module X20AT6402which takes the inputs from a theromcouple connected at a point at our machine. The measured values is being displayed on the HMI.
There have always been a difference of 2~3 degreeC between the value I directly measure at the point where the thermocouple is connected and what is being displayed on the HMI- which is now worrying me. For example, if I measure the temp value by a multimeter on the point where the thermocouple is connected I get 37.9degreeC but the value being displayed on the HMI is 39.9degreeC.
Our earlier process would allow this much variation but the newer one doesn't. Can somebody help me in understanding why there is this difference and what is needed to be done?
I have done following troubleshooting steps yet :
(1) Changed thermocouple many times
(2) Changed the male-female connectors between thermocuple and Input module.
(3) Changed all the cables.
(4) Even replaced the Input module with new one couple of times.
But all in vain and I still get the variation.
Please help.
Thanks,
Saurabh
Our machines are using B&R's Temperature Input Module X20AT6402which takes the inputs from a theromcouple connected at a point at our machine. The measured values is being displayed on the HMI.
There have always been a difference of 2~3 degreeC between the value I directly measure at the point where the thermocouple is connected and what is being displayed on the HMI- which is now worrying me. For example, if I measure the temp value by a multimeter on the point where the thermocouple is connected I get 37.9degreeC but the value being displayed on the HMI is 39.9degreeC.
Our earlier process would allow this much variation but the newer one doesn't. Can somebody help me in understanding why there is this difference and what is needed to be done?
I have done following troubleshooting steps yet :
(1) Changed thermocouple many times
(2) Changed the male-female connectors between thermocuple and Input module.
(3) Changed all the cables.
(4) Even replaced the Input module with new one couple of times.
But all in vain and I still get the variation.
Please help.
Thanks,
Saurabh