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P a g e
5
Appendix: SP-016 Registers
The following Appendix provides the registers and list index for the Layer N SP-016 Heat Flux Smart Probe. This information
is intended to aid users who will be making configurations and adjustments to their Layer N SP-016 Heat Flux Smart Probe
through the Command Line Interface or other custom interfaces.
Smart Probe devices share a common platform architecture that provides extensive monitoring and control capabilities thru
a set of platform generic registers. These registers may be accessed using I2C based commands directly to the Smart Probe
devices or thru a set of Modbus based registers when using Omega Interface devices. Refer to the
Smart Sensor Device
Interface
manual for further information.
When powered on or after a device reset each Smart Sensor based device will enumerate 1 or more sensor instances which
are described by the device specific Sensor Descriptors which include configuration options, measurement type, and units
of measure for the corresponding sensor values. Additional sensor information is provided in sensor specific IPSO object
descriptions which include extended measurement type, precision, and tracking of minimum/maximum readings.
Each enumerated Sensor has a Descriptor Base address location and a Sensor IPSO / Configuration structure address
location based on the sensor mix selected.
Sensor Descriptor Base IPSO/Configuration
Enumerated Sensor
0
0x0060 (0xf030)
0x08a8 (0xf454)
Heat Flux
1
0x0068 (0xf034)
0x09a8 (0xf4d4)
TC
DIO (SP-016-1)
2
0x0070 (0xf048)
0x0aa8 (0xf554)
DIO (SP-016-1)
3
0x0078 (0xf03c)
0x0ba8 (0xf5d4)
Not Used
5.1
Heat Flux Input Descriptor
The SP-016 configures the sensors based on the factory device list and user specified list index.
The Sensor Configuration and Sensor Device fields may be written to provide control of the overall function of the channel
and the signal types used.
Offset
Name
Value
Description
0x00
Measurement Type
0x35
Heat Flux (W/m
2
)
0x01
Data Type/Format
0x26
Float, Factory Calibration enabled
0x02
Configuration
0x??
Sensor Range/Type (not used)
0x03
Sensor Device
0x??
Sensor IO Configuration
0x04..0x08
UOMR
“W/m2” Units of measure
5.1.1
Heat Flux Measurement Types
The interface provides a measurement of the heat flux in W/m
2
.
Sensor Type
SI Derived Units
Measurement
0x35
W/m2
Watts per square meter
5.1.2
Heat Flux Input Data Type/Format
The SP-016 supports extended configuration and provides factory calibration. All data values are returned as 32-bit
floating point values.
Heat Flux Input Data Type/Format
7
6
5
4
3
2
1
0
Smart
Sensor
Writable
Factory
Calibrate
Reserved
Data Type
0
0
?
0
6 == Floating point