Hi,

I have Analog input card configured for thermocouple type k. From card documentation the range of type K is -230 ÷ 1360 °C.
Is it possible to know the correspondent range of the PEW analog value for engineering conversion?

Thanks

Elvis

Hi,

I have Analog input card configured for thermocouple type k. From card documentation the range of type K is -230 ÷ 1360 °C.
Is it possible to know the correspondent range of the PEW analog value for engineering conversion?

Thanks

Hi

it depends what kind of analog card you will use.

Manuals: SM331; AI 8 x 12 Bit Getting Started part 3: Thermocouples ( https://support.automation.siemens.com/WW/skm/frameset.asp?url=%2FWW%2Fllisapi%2Edll%2F18972936%3Ffunc%3Dll%26objId%3D18972936%26objaction%3Dcsopen%26siteid%3Dcseus%26skm%3D1%26lang%3Den%26query%3Dsm331%2Bgetting%26ehbid%3Dhtml%255F76%252Fehb%252F18972936%252Ehtm%26nodeid%3D&Query=sm331+getting&SearchArea=hb&id=18972936&F11Marker=true&siteid=cseus&query2=&modelled=&lang=en )

page 54

or

Manuals: S7-400 automation system module specifications ( https://support.automation.siemens.com/WW/skm/frameset.asp?url=%2FWW%2Fllisapi%2Edll%2F1117740%3Ffunc%3Dll%26objId%3D1117740%26objaction%3Dcsopen%26siteid%3Dcseus%26skm%3D1%26lang%3Den%26query%3Ds7%252D400%2Bmodule%26ehbid%3Dhtml%255F76%252Fehb%252F1117740%252Ehtm%26nodeid%3D&Query=s7%2D400+module&SearchArea=hb&id=1117740&F11Marker=true&siteid=cseus&query2=&modelled=&lang=en )

regards

Generally, If you have a module compatible with your thermocouple (look at the open decrypted manuals and / or set it in HW CONFIG), the temperature is read directly in grad, 10x grad or 100x grad (Celsius, Kelvin or Fahrenheit in dependence of the Module / HW CONFIG).

So, in the practice, if you have an idea about the measured temperature, it is easy check it in the VAT the range of the IO.
For example, an ambient temperature (25C), the PEWis showed as integer with values of 25, 250 or 2500.