DPMS XPQ, User Manual

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DPMS XPQ User Manual
Response
The normal response to a preset Multi-Register request includes the
meter's address, function code, data start register, the number of registers, and
error checking.
Addr fun Data start
addr hi
Data start
addr lo
Data
register hi
Data
register lo
CRC
high
CRC
low
11H 10H 01H 56H 00H 02H A2H B4H
Table5.13 Preset Multi-Registers Response Message
Data Address Table and Application Details
There are several rules to follow in using the meter:
1. Data type:
“bit” refers to binary
“word” refers to 16-bit unsigned integer using one data address and 2 bytes
of memory, it varies from 0 - 65535.
“int” refers to 16-bit integer using one data address and 2 bytes of memory,
it varies from -32768 - 32767.
“dword” refers to 32-bit unsigned integer using two data addresses and 4
bytes of memory with high word at the front and low word at the end, it varies
from 0 - 4294967295.Rx=high word *65536+low word.
“float” refers to 32-bit single value using two data addresses and 4 bytes of
memory, it varies from -1.175494E-38 - 3.38.
2. Relationship between communication value and numerical value.
The numerical value may not be the communication value, it is important to
notice this. The following table shows how they correspond to each other.