Component: Thermocouple (MAX31856) (Environmental): Difference between revisions
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| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''ReadThermocouple_Float''' | | width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''ReadThermocouple_Float''' | ||
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| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''ReadThermocouple_Int''' | | width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''ReadThermocouple_Int''' | ||
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| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''Sample''' | | width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''Sample''' | ||
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| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''WriteColdJunctionOffset''' | | width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''WriteColdJunctionOffset''' | ||
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| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''WriteColdJunctionTemperature''' | | width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''WriteColdJunctionTemperature''' | ||
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Revision as of 14:17, 13 July 2026
| Author | Matrix TSL |
| Version | 1.0 |
| Category | Environmental |
Thermocouple (MAX31856) component
Component to interface the MAX31856 IC from MAXIM. Uses a standard 4-wire SPI interface to connect to the IC and collect the temperature. Compatible with different thermocouple types.
Detailed description
No detailed description exists yet for this component
Examples
No additional examples
Macro reference
Initialise
|
Initialise |
| Configures the SPI bus ready for communications. | |
 - VOID
|
Return |
ReadReference_Float
|
|
ReadReference_Float |
| Returns the reference temperature from the last sample as a floating point value in Degrees C. | |
 - FLOAT
|
Return |
ReadReference_Int
|
|
ReadReference_Int |
| Returns the reference temperature from the last sample as an integer value in Degrees C. | |
 - INT
|
Return |
ReadThermocouple_Float
|
|
ReadThermocouple_Float |
| Returns the thermocouple temperature from the last sample as a floating point value in Degrees C. | |
| - FLOAT
|
Return |
ReadThermocouple_Int
|
|
ReadThermocouple_Int |
| Returns the thermocouple temperature from the last sample as an integer value in Degrees C. | |
| - INT
|
Return |
Sample
|
|
Sample |
| Reads the memory of the MAX31855 IC and checks for errors. Must be called before any of the Read functions. Returns: 0=OK, 1=Open Circuit, 2=Under/Over Voltage, 3=Out of range | |
 - BYTE
|
Return |
WriteColdJunctionOffset
|
|
WriteColdJunctionOffset |
| When Cold Junction Compensation is enabled mode this macro allows you to define the offset temperature of the cold junction. | |
| - FLOAT
|
OffsetTemperature |
| Range: +/- 7 Degrees | |
| - VOID
|
Return |
WriteColdJunctionTemperature
|
|
WriteColdJunctionTemperature |
| When Cold Junction Compensation is disabled/external mode this macro allows you to define the temperature of the cold junction. | |
| - FLOAT
|
Temperature |
| Range: +/- 127 Degrees | |
| - VOID
|
Return |
Property reference
|
Properties |
|
Thermocouple Properties |
|
Thermocouple Type |
| Specified the thermocouple type used with the sensor IC | |
|
|
Averaging |
| Select the number of samples used to provide stable readings. | |
|
|
Conversion Mode |
|
|
Notch Filter |
| Choose the frequency of notch filter | |
|
|
Cold Junction Compensation |
| Allows the chip to automatically perform cold junction compensation to try and get more accurate temperature conversions. Internal - Uses internal temperature sensor External / Disabled- Uses SetColdJunctionTemperature macro to allow for external temperature compensation. | |
|
|
SPI Properties |
|
|
Channel |
| SPI Channel selector | |
|
|
Prescale |
| Prescale option selector | |
|
MOSI |
| SPI Data Out Pin SDO - Also Known as Master Out Slave In (MOSI) when used in Master mode. | |
|
|
MISO |
| SPI Data In Pin SDI - Also Known as Master In Slave Out (MISO) when used in Master mode. | |
|
|
CLK |
| SPI Clock Pin CLK - The Clock signal is driven by the SPI master. | |
|
|
CS / SS |
| Chip Select / Slave Select Pin Master Mode: General purpose output pin used to select the remote SPI device. Slave Mode: Hardware chip select pin input used to select the SPI device. | |
|
|
Simulation |
|
Simulate Comms |
Component Source Code
Please click here to download the component source project: FC_Comp_Source_ThermocoupleMAX31856.fcfx
Please click here to view the component source code (Beta): FC_Comp_Source_ThermocoupleMAX31856.fcfx