HANYOUNG NUX MP3 Instruction Manual

Digital multi panel meter
MP3(RS485)
INSTRUCTION MANUAL
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Communication

The communication for MP3 is 2-wire or 4-wire Half-Duplex type by RS485. It is possible to
connect up to 31 units by using the prepared protocol for communication with PC.
HI
GO
LO
Communication parameters
The communication parameters are for setting the communication conditions. Please refer to
the content below.
Parameter Meaning Set value
STD
Protocol
PROT
selection
SUM
38400
19200
9600
BPS Baud Rates
4800
2400
1200
NONE
PRI Parity EVEN
ODD
7
DLEN Data length
8
1
STOP Stop Bit
2
ADDR Address 0 ~ 99
Communication protocol
The MP3 communication uses ASCII strings, it possible to read and use the defined register.
There are 2 protocols that are selected due to the parameters. The standard protocol is STD,
the starting text is STX (0X02), and the ending text is ETX (0X03)
● STD (standard protocol) frame structure
STX Address
0x02 0 ~ 99
Data structure
In the frame, the data are expressed with 10 decimals

Communication command

The communication command of MP3 is R (Read), W (Write)
●
Command
Command
R
W
HI HI HI
GO GO GO
LO LO LO
MP3 MP3 MP3
DIGITAL MULTI-METER DIGITAL MULTI-METER DIGITAL MULTI-METER
Content
Standard protocol
Standard protocol + Check sum
38400 bps
19200 bps
9600 bps
4800 bps
2400 bps
1200 bps
No parity
Even parity
Odd parity
7 bits
8 bits
1 bits
2 bits
Address setting
Command Data
Refer to each command
Discription
Read
Write
HANYOUNGNUX CO.,LTD
28, Gilpa-ro 71beon-gil, Nam-gu, Incheon, Korea
HEAD OFFICE
TEL : (82-32)876-4697

Read Command

█ Frame Format
The R command sets the register number and the code to be read on the frame,
as a command that can read the register value
Byte
Frame
█ Answer Frame Format
MP3
DIGITAL MULTI-METER
Byte
Frame
Byte
Frame
Ex. 1) Set value when reading the present value of code(01)
※ PV read
Default
●
Frame Format
◯(fixed)
×
STX
×
02
×
Send : STX+"01R18"+ETX
◯
×
●
Frame Format
×
Code
×
STX 0 1 R O K
◯(fixed)
02 30 31 52 4F 4B 2B
×
×
•Receive: : STX+"01R0K+00050000000"+ETX
×
•P : Mark +(2BH), -(2DH)
◯(fixed)
◯(fixed) •DP : Dimical point 0 (X.XXX)
×
◯
•Output status HI, GO, LO : 0 : Output OFF
Write Command
█ Frame Format
ETX
The W command sets the write data, register number and the code to be written on the
frame as a command that can write the register value
0x03
Byte
Frame
█ Response Frame Format
Byte
Frame
FAX : (82-32)876-4696 http://www.hynux.com
1 2 1
STX Address R
Read
1 2 1
STX Address R
6 1 1
Data HI GO
Output Output Output
status status status
Code
0 1 R
30 31 52
OK Mark Dimical point Data
5 4 3
P DP 10 10 10 10
30 30 30 35 30 30 30 30 30 30
•UERROR 0 : Normal operation
1 (XX.XX)
2 (XXX.X)
3 (XXXX.) •The currently displayed value of
MP3 is 5,000
1 : Output ON
1 2 1 2 1
STX Address W Register P
Mark Dimical point
1 2 1
STX Address W
Write
MG0101K170613
2 1
Register ETX
2 1 1
OK P DP
Sign Decimal point
1 1 1
LO Error ETX
Register
1 8 ETX
31 38 03
Output status
2 1 0
10 10 HI GO LO ERROR ETX
30 03
1 : Register does not exist
2 : Max display exceeded
3 : Input range exceeded
1 6 1
DP Data ETX
1 6 1
OK Error ETX