Thurzão Posted September 29 Report Share Posted September 29 Hi guys, I'm having a problem reading my type K thermocouples, I have an oven and it's not reading the thermocouples, showing a value of 32767, I've made all the connections, the thermocouples are working after all they indicate the values on a process indicator. I would like everyone's help to solve this major problem. Link to comment Share on other sites More sharing options...
MVP 2023 kratmel Posted September 29 MVP 2023 Report Share Posted September 29 The first question - did you set the jumpers in the module itself according to the instructions? Did you choose the correct type of thermocouple sensor in the hardware setting? Have you selected the correct analog input number for measurement? The module analog inputs is numbered 0, 1, 2, 3. If this is all done... Did you apply - and + to the +24V power supply module to pins 0V and V2? The last question - have you tried to close the corresponding inputs to the thermocouple with jumpers? In the closed state, the input should show the ambient temperature near the PLC. P.S.In your application, I saw a strange connection of one sensor to two inputs of the module. What is it made for? Link to comment Share on other sites More sharing options...
Thurzão Posted September 29 Author Report Share Posted September 29 1 hour ago, kratmel said: A primeira pergunta é: você configurou os jumpers no próprio módulo de acordo com as instruções? Você escolheu o tipo correto de sensor de termopar na configuração de hardware? Você selecionou o número de entrada analógica correto para medição? As entradas analógicas do módulo são numeradas 0, 1, 2, 3. Se tudo isso for feito... Você aplicou - e + ao módulo de alimentação de +24 V nos pinos 0 V e V2? A última pergunta - você tentou fechar as entradas correspondentes ao termopar com jumpers? No estado fechado, a entrada deve mostrar a temperatura ambiente perto do PLC. PS Na sua aplicação, vi uma conexão estranha de um sensor para duas entradas do módulo. Para que ele é feito? Yes, I've already configured the jumpers. I've also chosen the right type of thermocouple. Which is type K I've also selected the analog inputs. I've just applied the power supply test and 24V is coming into 0V and V2. I've already tried this test, but it still comes up with the same value. The jumper I made in the connection has to do with the programming - I use temperature 1 as the safety temperature on input 3, but it's correct. What's strangest is that I have two V1210 HMIs and a V200-18-E3XB module. One new and one old. The old one that was working also started to show this. The thermocouples are correct because they pass through a process indicator and are marking the temperature. Link to comment Share on other sites More sharing options...
Thurzão Posted September 29 Author Report Share Posted September 29 There was a possibility that the back of the RS232 or RS485 configuration could influence the thermocouple readings. Link to comment Share on other sites More sharing options...
MVP 2023 kratmel Posted September 29 MVP 2023 Report Share Posted September 29 22 minutes ago, Thurzão said: Existi a possibilidade desta parte de trás na configuração RS232 ou RS485 influenciar na leitura dos termopares. No. It do not affect to analog inputs. 23 minutes ago, Thurzão said: The thermocouples are correct because they pass through a process indicator and are marking the temperature. Please test termocouple short to ground. Please post V200-18-E3XB jamper configuration foto. P.S. Please test is it temperature sensor real TC (not PT100 or PT1000) Link to comment Share on other sites More sharing options...
Thurzão Posted September 29 Author Report Share Posted September 29 8 minutes ago, kratmel said: Não. Não afeta entradas analógicas. Teste o termopar em curto com o terra. Por favor, publique uma foto da configuração do jamper. how to test the thermocouple shorted to ground ? Link to comment Share on other sites More sharing options...
MVP 2023 kratmel Posted September 29 MVP 2023 Report Share Posted September 29 This is my E3XB module inside.... I do not see secondary board on your module. You disconnect this secondary board? If yes is it correctly mounted - no bended pins? Link to comment Share on other sites More sharing options...
MVP 2023 Ausman Posted September 29 MVP 2023 Report Share Posted September 29 10 hours ago, Thurzão said: One new and one old. The old one that was working also started to show this. To me this means you've got a fundamental problem in your wiring layouts, that has shown up quickly in your newer system. I don't know enough about thermocouples, but I thought that you can get problems when having 2 devices connected to the same couple, due to different internal characteristics of the measuring devices. As well as earthing complications. Why don't you use a separate one, or a dual t/c? If it's safety, then surely an innately separate sensor is better. On your doubled input, why did you change wire colours? Just confuses things....and brings into doubt other connections being done correctly. Link to comment Share on other sites More sharing options...
MVP 2023 Joe Tauser Posted September 29 MVP 2023 Report Share Posted September 29 11 hours ago, Thurzão said: how to test the thermocouple shorted to ground ? Remove all the thermocouple wires from the module and put a jumper between T+ and T-. You should read ambient temperature. Joe T. Link to comment Share on other sites More sharing options...
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