CHINT DTSU666-CT User Manual

DTSU666 series and DSSU666 series
three phase electronic energy meter
ZTY0.464.1448
User manual
Page 12, Total 21
Figure 5 Setting examples for communication address and Baud Rate
5.3. Communication function
Characterized with a RS485 communication interface, the baud rate can be changed between
1200bps, 2400bps, 4800bps , 9600bps and 19200. The default baud rate is 9600bps, with the
calibration bit and stop bit to be N.1, and instrument address 01 (please see instrument factory number
or crystal display screen).
Communication protocol: complied with the requirement of Modbus communication protocol.
The following table is the common ModBus protocol address table. ModBus_RTU protocol read
command is 03H, write command is 10H.
Table 11 ModBus protocol address table
Parameter
address
Parameter
code
Instructions of parameters
Data type
Data
length
Word
Read
Write
Keyboard parameters (specific parameters see the instructions of programming parameters, the actual value
with (*) parameter＝ communication parameter value × 0.1）
0000H
REV.
Software Version
Signed
1
R
0001H
UCode
Programming code codE(1～9999)
Signed
1
R/W
0003H
net
Network selection (0:three phase four
wire,1:three phase three wire)
Signed
1
R/W
0006H
IrAt
Current transformer rate IrAt(1～9999)
Signed
1
R/W
0007H
UrAt
Voltage transformer rate UrAt（*）
(1～9999 represents voltage ratio 0.1～999.9)
Signed
1
R/W
000AH
Disp
Rotating display time（s）
Signed
1
R/W
000BH
B.LCD
Backlight time control（m）
Signed
1
R/W
000CH
Endian
Reserve
Signed
1
R/W
002CH
Protocol
Protocol switching
(1:DL/T645;2:n.2;3:n.1;4:E.1;5:o.1)
Signed
1
R/W
002DH
bAud
Communication baud rate bAud
(0:1200;1:2400;2:4800;3:9600;4:19200)
Signed
1
R/W
002EH
Addr
Communication address Addr(1～247)
Signed
1
R/W

CHINT DTSU666-CT Specifications

General

Brand	CHINT
Model	DTSU666-CT
Category	Measuring Instruments
Language	English