3/12/2018 8:00 PM | |
Posts: 200 Rating: (6) |
Hi I starting another bench project and have been set the following. I have 4-20ma input from my temp sensor into my logo, when the sensor detects a 10 degC it will switch on and when it detects 20 degC it will switch of basically trying to maintain a 20 degC room temp all the time I then have a 0-10v out put to a chiller and 0-10v to a heater valve Within the attached software i have altered some of the parameters to show on the screen 0 deg to 20 degC switching settings. and adjusted the 4-20ma to show 0 degC at 4ma and 20 degC at 20ma When i try the software i am gettong 0v at 0 deg and 10v at 10 degC where i am wrong is that i am not getting the 10v at 20 degC Thanks Andrew Attachment0 to 10.zip (308 Downloads) |
3/12/2018 9:22 PM | |
Posts: 200 Rating: (6) |
I have attached the data sheet for the sensor i have. AttachmentT1.pdf (297 Downloads) |
3/12/2018 9:28 PM | |
Joined: 12/18/2014 Last visit: 9/20/2024 Posts: 33807 Rating: (4200)
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With this sensor goes you directly to the LOGO! ? Or have you a transmitter for sensor with an output 4-20 mA? |
3/12/2018 9:36 PM | |
Posts: 200 Rating: (6) |
Its directly into the logo AM2 |
3/12/2018 9:58 PM | |
Joined: 12/18/2014 Last visit: 9/20/2024 Posts: 33807 Rating: (4200)
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Do you even know how small the voltage is that the sensor output?
Have you the 10 kOhm resistor in series with the sensor and supply for the sensor 15 VDC as you in the datasheet? Since you are absolutely wrong with your sensor settings. The setting for the sensor: Sensor type: 0-10V The resolution of the LOGO! is thus 1 °C per unit.
Attachment0 to 10_V2.zip (315 Downloads) |
Last edited by: ixo65 at: 3/12/2018 10:00:01 PM |
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3/13/2018 8:04 AM | |
Posts: 200 Rating: (6) |
Hi I appreciate your patience as always this is all new The sensor was one that i found that i could use for this but with the using of resistors in the circuit is not something i want to do I would be more comfy in using the 4-20ma type. I have found another one that i could use and have available to test with against the program. Attachmentie-snc-pxxxx.pdf (332 Downloads) |
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