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PTC Motor Thermal Input


odoardo
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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?

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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?

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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.

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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.

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