Outback Power Systems AXS Port SunSpec Modbus Interface Owners Manual - Manual (Page 10)

Operation
8 900-0138-01-00 Rev B
SunSpec Blocks
The AXS Port uses the SunSpec protocol to assemble blocks of data on each connected product. The
SunSpec client software can read or write to each field in a data block on the AXS Port. The fields are
used for remote commands, control settings, or status information on the OutBack product.
A user with SunSpec client software can use the following tables to interpret these blocks. Samples of
the SunSpec client software are available at www.outbackpower.com. For more information on the
SunSpec protocol, go to www.sunspec.org.
When enabled, the microSD card inserted in the slot will record operational status data about the
system. (See page 3.)
Columns
¾ Start and End: The register addresses for the beginning and end of each field, offset from the beginning of
the block.
¾ Size: The number of registers occupied by each field.
¾ R/W: Indicates this field’s permissions.
¾ Field name: The name and function of each field.
¾ Type: Explains how the field’s data is formatted.
¾ Units: The units of measure for each field, if applicable.
¾ Scale Factor: Indicates scaling a measurement value.
¾ Contents: Classification of field data (or a fixed value, where applicable).
¾ Description: Describes the field data.
SunSpec Block Structure
The first block is the Common Block, which supplies vendor and model information for the device.
The second (and subsequent) blocks will be device-specific, such as a block for charge controllers.
NOTE: OutBack charge controllers have a separate block for status fields and a separate block for
command and control fields. See page 3.
The final End Block formally marks the end of the block structure.
Device-Specific Blocks
The following blocks describe the devices currently supported by OutBack Power.
NOTE: These blocks may be subject to change without notice and should be used as examples only.
For current information, go to www.outbackpower.com.
OutBack Block:
This block is for the AXS Port itself, with network settings and other configuration parameters.
Table 1 OutBack Block
Start End Size R/W Field Name Type Units
Scale
Factor Contents
Description
0 0 1 R C_SunSpec_DID uint16 N/A N/A 64110
Uniquely identifies this as a SunSpec OutBack
Interface
1 1 1 R C_SunSpec_Length uint16 Registers N/A 282 Length of block in 16-bit registers
2 2 1 R
OutBack_Major_Firmware_
Number
uint16 N/A N/A Read Only OutBack Major firmware revision
3 3 1 R
OutBack_Mid_Firmware_
Number
uint16 N/A N/A Read Only OutBack Mid firmware revision