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
Reserved
‐
‐
6
1
DBWh_SF
Int16
R
Energy
scale
factor
7
1
Reserved
‐
‐
8
1
N
Uint16
R
Number
of
strings
9
6
Reserved
‐
‐
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
Reserved
‐
‐
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
Reserved
‐
‐
27
2
DCWh
Uint32
R
Daily
integrated
string
output
energy
29
2
Reserved
‐
‐
31
1
String
ID
Int16
R
The
string
number.
32
2
Reserved
‐
‐
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
Reserved
‐
‐
43
2
DCWh
Uint32
R
Daily
integrated
string
output
energy
45
2
Reserved
‐
‐
Repeat
block
for
additional
strings
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