RTD with PT1000 wrong temperature value

Are all 8 RTD inputs used? What do you do with any unused RTD inputs?  Do you jumper them?  If not, try that.  I don't have the s7-1200 manual in front of me, but think it states to jumper unused RTD/TC and voltage analog inputs.  

siwyeques

Hi guys

The measurement of my TEHU PT1000 is 1087 ohms which is about 22.5 °C .

I'm reading temperature directly from PLC tags %IW = 247 so 24.7°C

Checked for all channels.

Is it possible that measurement error is above 2°C ? Maybe some bug in TIA PORTAL V15.1 ?

Is there a way to check measured resistance ?

Connection type is two-wire, but 0,2m length, so i can skip wire compensation

RTD module chanel is set to Thermal resistor 2-wire, PT1000 standard range, DIN EN60751, smoothing week

RTD is 6ES7 231-5PF32-0XB0 FW v02.00.03

Power supply PM1207 - measured 22.2V

Time to get the datasheet for the RTD(s).  Exact manufacturer / part # for the RTD?

siwyeques

Loops on i+ and i- on inactive channels

Measurement type is set to deactivated

Do you have a web link to the PT1000 2-wire standard RTD ?  That V-M2CD5847 does not appear in any online search results for me.

Or, just try all 4 temperature coefficients for the PT1000:

Pt 0.003850
Pt 0.003902
Pt 0.003916
Pt 0.003920

(From the s7-1200 system manual) 

siwyeques

6ES7 231-5PF32-0XB0

FW v02.00.03 

V-M2CD5847