odoardo Posted December 22, 2014 Share Posted December 22, 2014 Hi, In Power Brick AC, I want read ADC conversion of PTC thermistor and implement a simple background PLC in order to stop operation when there is a motor overheating. After written a pointer, PTR Ch1PTC->PowerBrick[0].GpioData[0].24.1; // Channel 1 PTC Input, X1 PTR Ch2PTC->PowerBrick[0].GpioData[0].25.1; // Channel 2 PTC Input, X2 Which istruction allows me to read ADC value of PTC input? Link to comment Share on other sites More sharing options...
odoardo Posted December 22, 2014 Author Share Posted December 22, 2014 Hi, In Power Brick AC, I want read ADC conversion of PTC thermistor and implement a simple background PLC in order to stop operation when there is a motor overheating. After written a pointer, PTR Ch1PTC->PowerBrick[0].GpioData[0].24.1; // Channel 1 PTC Input, X1 PTR Ch2PTC->PowerBrick[0].GpioData[0].25.1; // Channel 2 PTC Input, X2 Which istruction allows me to read ADC value of PTC input? Link to comment Share on other sites More sharing options...
Omron Forums Support Posted December 22, 2014 Share Posted December 22, 2014 Hi, These are digital signals, so there is no need to read the ADC value. As page 133 of the manual describes: The PTC input (pin #8) is typically wired to ground (pin #12) in series with the motor PTC thermistor: In normal mode operation, the circuit is open and PTC (pin #8) is pulled up to +5V internally, this corresponds to a setting of 1 in software. If the motor is overheated, the circuit is closed and PTC (pin #8) is pulled down to ground (pin #12), this corresponds to a setting of 0 in software. If you really want to read the ADC value and your motor has a thermal sensor on it, you have to bring it into the Brick's ADC inputs. Link to comment Share on other sites More sharing options...
Omron Forums Support Posted December 22, 2014 Share Posted December 22, 2014 Hi, These are digital signals, so there is no need to read the ADC value. As page 133 of the manual describes: The PTC input (pin #8) is typically wired to ground (pin #12) in series with the motor PTC thermistor: In normal mode operation, the circuit is open and PTC (pin #8) is pulled up to +5V internally, this corresponds to a setting of 1 in software. If the motor is overheated, the circuit is closed and PTC (pin #8) is pulled down to ground (pin #12), this corresponds to a setting of 0 in software. If you really want to read the ADC value and your motor has a thermal sensor on it, you have to bring it into the Brick's ADC inputs. Link to comment Share on other sites More sharing options...
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