User's Manual

Chapter 2: Installing the Ampt-CU
Copyright2014AMPT,LLC.
9
ModbusRegisterMap
Ampt StringView records use the SunSpec protocol for device ID and variable record
length, enabling site-specific operation. The SunSpec Common Model precedes the map
below. Contact Ampt or one of our monitoring partners for more information.
Start
offset
Size Name Type R/W Description
1 1 ID Uint16 R AmptSunSpecVendorCode64050
2 1 L Uint16 R Variablenumberof16bitregisterstofollow:
12+N*16
FixedBlock(15
)

3 1 DCA_SF Int16 R Currentscalefactor
4 2 Reserve
d
 ‐‐
6 1 DBWh_SF Int16 R Energyscalefactor
7 1 Reserve
d
 ‐‐
8 1 N Uint16 R Numberofstrings
9 6 Reserve
d
 ‐‐
Registerblocksforstringdatafollow.Repeatblockforeachstring.Twostringsareshownasanexample.
15 1 StringID Int16 R Thestringnumber.
16 2 Reserve
d
 ‐ ‐
18 2 Stringdatatimestamp Uint32 R TheUTCtimestampofthemeasurements.
20 1 OutDCA Int16 R StringoutputcurrentinmA
21 6 Reserve
d
 ‐ ‐
27 2 DCWh Uint32 R Dailyintegratedstringoutputenergy
29 2 Reserve
d
 ‐ ‐
31 1 StringID Int16 R Thestringnumber.
32 2 Reserve
d
 ‐‐
34 2 Stringdatatimestamp Uint32 R TheUTCtimestampofthemeasurements.
36 1 OutDCA Int16 R StringoutputcurrentinmA
37 6 Reserve
d
 ‐‐
43 2 DCWh Uint32 R Dailyintegratedstringoutputenergy
45 2 Reserve
d
 ‐‐
Repeatblockforadditionalstrings