Juandiaza Posted May 3, 2017 Report Share Posted May 3, 2017 Hello, I am new in all of this PLC field but I want to start with small projects in order to get some experience and then moving on bigger projects. I want to put a graph in my HMI (I actually did it a Variable thermometer Graph MI 12) and see the real temperature value over the graph. According to the Analog Input Wiring, I know that my input (9) AN0 and input (10) AN1 are the inputs. First question: When I start to wire up. Do I just put a wire in AN0 and the other in AN1???? or should be connecting in parallel with V + one side and the other side with 0 - references????? And I know that I have to configure this inputs in my HW configuration. in Analog input I put: No. Type Filter Mode Op Addr Description 0 0-10V No filter MI 4 Thermocouple wire + 1 0-10 V No filter MI 5 Thermocouple wire - Can you guys check if this configuration is Ok? I appreciate the help!!!! I am not sure if I have to link this with MI 4 or MI 5 with the thermometer graph above??? The last question is Do I have to Linearization in my ladder in order to scale values? if Yes, which variable Do I have to attach the linearization????? Thanks a lot sorry for mistakes my English is not my first language. Quote Link to comment Share on other sites More sharing options...
DanT Posted May 3, 2017 Report Share Posted May 3, 2017 What model SAMBA are you using. The -T20 and -R20 models do not support Thermocouples. Thermocouples produce very small voltages in relation to the temperature being measured. The 0-10V Analog inputs ( 10 Bit ) are not fine enough to read the millivolts generated. Thermocouples are supported on the -RA22 and -TA22 Models. The Installation Sheet describes the wiring for the various types. In the -RA22 and -TA22 thermocouple inputs is already converted and the value is stored as xxx.x degrees C or F Quote Link to comment Share on other sites More sharing options...
Juandiaza Posted May 3, 2017 Author Report Share Posted May 3, 2017 The model is R20. Is there a way to support if I add any accesories? Thanks Quote Link to comment Share on other sites More sharing options...
Cam Posted May 3, 2017 Report Share Posted May 3, 2017 The Samba is non-expandable so it is not possible to add the required thermocouple input(s) to the unit you have. As Dan stated you'd have to look at the -RA22 or -TA22 models. or you'd need an external module to convert the thermocouple input to a 4-20 or 0-10V signal that the PLC can accept. Phoenix Contact or Weidmuller are two companies which have this type of module. 1 Quote Link to comment Share on other sites More sharing options...
Juandiaza Posted May 4, 2017 Author Report Share Posted May 4, 2017 Thanks a lot for your help. Quote Link to comment Share on other sites More sharing options...
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