41
Table 9
Map of ND20 meter registers
In the ND20 meter, data are placed in 16 and 32-bit registers. Process
variables and meter parameters are placed in the address area of
registers in a way depended on the variable value type. Bits in 16-bit
registers are numbered from the youngest to the oldest (b0-b15). 32-bit
registers include numbers of float type in IEEE-754 standard.
Device address
Function
Number of bytes
Identifier
Device status
Information field of the device
software version (eg, „ND20-
1.09 b-1.04” - ND20 device
with software version 1.09 and
bootloader version 1.04)
CRC
Control
sum
01 11
19 BC FF 4E 44 32 30 2D 31 2E 30 39 20
20 20 20 20 20 20 62 2D 31 2E
30 34 20
DB 42
Response:
Address
range
Type of
value
Description
1000 – 1077 Integer
(16 bits)/
record
Archive of the averaged power profile. The table 10
includes the register description.
4000 – 4055 Integer
(16 bits)
The value is placed in one 16-bit register. The table
11 includes the register description. Registers for
write and readout.
6000 – 6319 Float
(2x 16
bits)
Value placed in two successive 16-bit registers.
Registers include the same data as 32-bit registers
from the area 7500 – 7659. Registers for readout.
Sequence of bytes (1-0-3-2).
6320 – 6573 Float
(2x 16
bits)
Value placed in two successive 16-bit registers.
Registers include the same data as 32-bit registers
from the area 7660 – 7786. Registers for readout.
Sequence of bytes (1-0-3-2).
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