The query format for downloading an entry of a daily load profile log is given below. Maximum number of register
the user can access in 1 query are limited by 40.
Query Format for Downloading the Load Profile Datalog
Description Decimal Value Hex Value
Dev Addr 03 03
Func Code 16 10
Start Addr Hi 01
Start Addr Lo CC
No of Reg Hi 00 00
No of Reg Lo 20 14
Log Download Bytes 40 28
Parameter no 03 03
Date 04 04
Month 11 0B
Year 17 11
CRC Lo AD
CRC Hi C3
Query example:
The load profile datalog access query consists of device address and function code followed by the starting
address which is different for different parameters and mentioned in TABLE 17. Number of registers can vary in
multiple of 2, but can not exceed 40 and corresponding to it, number of bytes can not exceed 80.
Parameter number decides the parameter within the log (eg. Capacitive VAr energy from the daily energy log.)
Refer TABLE 18 and TABLE 19.
Date, month and year decides the date from which the data is to be downloaded.
All data in the query is represented in hexadecimal format.
At the end 2 byte CRC is calculated.
Example: If a user wants to access daily energy load profile
log of Capacitive VAr Energy for 10 days from 4 November
2017 to 13 November 2017, the query for this will be as
following.
03,10,01,CC,00,14,28,03,04,0B,11,AD,C3
03 is device address;
10 is function code;
01 CC is the starting address for accessing the daily energy
load profile log. (refer TABLE 17)
00 14 is the number of registers to be accessed. This value
will be double of the number of parameters requested.
28 is the number of bytes requested in this query. This value
will be 4 times the number of parameters requested.
03 is the parameter number for Capacitive VAr energy import
data. (refer TABLE 18)
04 0B 11 is the starting date of the log to be accessed.
AD C3 is the CRC added at the end.
54
To Next Page
Loading...
