Acrel ARTU Installation instructions

079
ARTU Remote Terminal Unit
Installation & Operation Instruction V1.3
Acrel Co., Ltd.

Acrel Jiangsu Acrel Electrical Manufacturing Co., LTD.
Declaration
All rights reserved. Without the written permission of the Company, the contents of any paragraph or section in this
manual shall not be copied, copied or disseminated in any form. Otherwise, all consequences shall be borne by the
violator.
Our company reserves all legal rights.
Our company reserves the right to modify the product specifications described in this manual without prior
notice.Before placing an order, please consult your local agent for new specifications of this produc

Catalog
1 Overview------------------------------------------------------------------------------------------------------------- 1
2 Model instruction-------------------------------------------------------------------------------------------------- 1
3 Product Features---------------------------------------------------------------------------------------------------1
4 Use conditions------------------------------------------------------------------------------------------------------ 1
5 Product Specifications-------------------------------------------------------------------------------------------- 2
5.1 ARTU-K8/K16/K32 Remote signal unit----------------------------------------------------------------------- 2
5.1.1 Overview------------------------------------------------------------------------------------------------------------------------ 2
5.1.2 Technical parameters----------------------------------------------------------------------------------------------------------2
5.1.3 Installation and wiring-------------------------------------------------------------------------------------------------------- 2
5.1.4 Communication instructions-------------------------------------------------------------------------------------------------5
5.1.5 Communication examples----------------------------------------------------------------------------------------------------9
5.2 ARTU-KJ8 Remote signal and remote control combination--------------------------------------------10
5.2.1 Overview-------------------------------------------------------------------------------------------------------------------------10
5.2.2 Technical Parameter----------------------------------------------------------------------------------------------------------- 10
5.2.3 Installation and wiring---------------------------------------------------------------------------------------------------------10
5.2.4 Communication instruction--------------------------------------------------------------------------------------------------- 11
5.2.5 Communication Example---------------------------------------------------------------------------------------------------13
5.2 Appendix----------------------------------------------------------------------------------------------------------- 14
5.3 Setting of dial code switch---------------------------------------------------------------------------------------14
5.3.1 Definition of dial code------------------------------------------------------------------------------------------------------ 14
5.3.2 Add setting-------------------------------------------------------------------------------------------------------------------- 14
5.3.3 Baud rate setting--------------------------------------------------------------------------------------------------------------14
5.3.4 Mode setting------------------------------------------------------------------------------------------------------------------ 14
5.3.5 Format setting-----------------------------------------------------------------------------------------------------------------14
5.4 Modbus Function code description----------------------------------------------------------------------------14
5.4.1 Abnormal reply format of ARTU remote terminal unit to command received in error------------------------- 14
5.4.2 Functional status of 01H/02H using Modbus--------------------------------------------------------------------------- 15
5.4.3 Read using Modbus's functions of 03 or 04----------------------------------------------------------------------------- 15
5.4.4 Use the 05H function of Modbus to force the alarm state------------------------------------------------------------ 15
5.4.5 Use the 06H function of Modbus to write single data----------------------------------------------------------------- 16
5.4.6 Use Modbus's 10H function to write multiple data-------------------------------------------------------------------- 16
5.5 Communication wiring method-------------------------------------------------------------------------------- 17
5.6 Debugging and maintenance------------------------------------------------------------------------------------18
5.6.1 Use instruction----------------------------------------------------------------------------------------------------------------18
5.6.2 Debugging--------------------------------------------------------------------------------------------------------------------- 18
5.7 Outline and dimension diagram------------------------------------------------------------------------------- 19
ARTU-K8/K16/K32 Remote signal unit Outline and dimensions--------------------------------------------- 19
ARTU-KJ8 Remote signal & remote control unit Outline and dimensions--------------------------------- 19

1
1Overview
ARTU remote terminal unit is a high-performance intelligent distribution element, which is applied in intelligent
distribution, industrial automation and other fields.Products include: remote control unit, remote signaling unit.
Meet the standards:
JB/T 10388-2002 General technical conditions for intelligent measurement and control node products with bus
communication function
GB/T 13729-2002 Remote terminal equipment
2Model instruction
3Product Features
1) The product has channel status indicator light and communication status indicator light.Among the two
communication interfaces, one is used for setting and debugging common parameters, and the other is used for
reading and setting "four-remote" values.
2) The address and baud rate of the product can be set by upper computer or local dial code switch.
3) The product adopts software and hardware "watchdog" technology to prevent the phenomenon of crash
4Use conditions
1) Auxiliary power supply:
24VDC, allowing 18 ~ 36VDC
220VAC (DC) allows AC85 ~ 275V or DC100 ~ 350V, subject to the actual wiring diagram.
2) Power consumption: ≤5W
3) Working environment: -5 ~ +55℃
4) Relative humidity: ≤95%RH, non-condensation, non-corrosive gas
5) Storage temperature: -25 ~ +70℃
6) Altitude: ≤2500m
7) Protection level: IP20
8) Insulation strength:
Conventional: 2kV/1min, 50Hz
Artu-kj8:1kV/1min between power supply, communication and switching input, 50Hz;
Relay and power / / communications / / switch between input and 2 kv / 1 min, 50 hz
9) Installation method: TS35 guide rail installation
10)EMC performance meets the following standards:
GB/T 17626.2 Electrostatic discharge immunity test class 4

2
GB/T 17626.3 Radiofrequency electromagnetic field radiation immunity Test class 3
GB/T 17626.4 Electrical fast transient pulse group immunity Test class 4
GB/T 17626.5 Impact (surge) immunity - Test Class 3 (ARTU-KJ8 test class 1)
GB/T 17626.6 Conducted disturbance immunity test class 3 for rf field induction
GB/T 17626.12 Oscillating wave immunity - Test class 3
5Product Specifications
5.1 ARTU-K8/K16/K32 Remote signal unit
5.1.1 Overview
ARTU remote signal unit is a switch acquisition unit specially developed for intelligent power distribution,
industrial automation and other fields, which is used to acquire switch-volume signals and convert them into digital
signals through communication and data exchange of upper computer monitoring system.
5.1.2 Technical parameters
Performance
Indicators
Input circuit
8/16/32
Input mode
Active wet contact (DC12V) or passive dry contact
Bus way
Half duplex RS485 (Modbus RTU), three-core shielding wire is
recommended
Bus capacity
≤32
Switch event resolution
The ability to distinguish successive displacement of multiple contacts.
When the displacement interval of any two contacts is greater than 1
millisecond,
The ability to differentiate units (less than 2ms) is reflected in the SOE
Remote scanning speed
The scanning time of all channels for one week is 1ms
Remote signal
debouncing time
All channels adopt a unified debuffing time of 1ms(configurable)
Event sequence logging
(SOE) capacity
1600 groups
5.1.3 Installation and wiring
5.1.3.1 Overall dimensions and unit installation
Outline size (length × width × height) : 160 × 50 ×110mm (see Appendix 6.5)
Installation: Standard track TS35

3
5.1.3.2 Wiring
K8/K16 Terminal number

4
K32 Terminal number
Note:
Active wet contact: Ki (I =1 ~ 32) and common terminal K COM are access terminals of each channel, while KV12
and KG are suspended.
Passive dry contact: Ki (I =1 ~ 32) and common end KV12 are access ends of each channel, while KCOM should be
short-connected with KG.
5.1.3.3 Application examples
a) Connecting diagram of passive dry contact:

5
b) Active wet contact connection diagram:
5.1.4 Communication instructions
5.1.4.1 Read and write register contents
Modbus function code 03 (03H) and 04 (04H) can be used to access all contents of the address table, and
function code 16 (10H) can be used to write continuous register data.
Data
address
Data content
Data types
Read/
Write
Comman
d word
Data
length(byte)
Write to
allow
operating
ports
00
Meter identification code #
Fixed-poin
t number
R
03、04
2
01
Version number
Fixed-poin
t number
R
03、04
2
02
Address number
Fixed-poin
t number
R/W
03、04/16
2
COMM2
03
Communication baud rate
Fixed-poin
t number
R/W
03、04/16
2
COMM2
04
Communication check mode
Fixed-poin
t number
R/W
03、04/16
2
COMM2
05
Clock setting seconds, minutes
(BCD code)
Fixed-poin
t number
R/W
03、04/16
2
COMM2
06
Clock setting hours, days
(BCD code)
Fixed-poin
t number
R/W
03、04/16
2
COMM2

6
07
Clock setting month, year
(BCD code)
Fixed-poin
t number
R/W
03、04/16
2
COMM2
08
Clock setting allowed (1: YES)
Fixed-poin
t number
R/W
03、04/16
2
COMM2
09
Reserve
10
Reserve
11
SOE Address pointer (25-8021)
Fixed-poin
t number
R
03、04
2
12
Current time millisecond
(integer 0-999)
Fixed-poin
t number
R
03、04
2
13
Current time seconds, minutes
(BCD)
Fixed-poin
t number
R
03、04
2
14
Current time, hour day (BCD)
Fixed-poin
t number
R
03、04
2
15
Current time month, year (BCD)
Fixed-poin
t number
R
03、04
2
16
Current state of remote signaling
channel (32 ~ 17)
Fixed-poin
t number
R
03、04
2
17
Current state of remote signaling
channel (16 ~ 1)
Fixed-poin
t number
R
03、04
2
18
Debouncing time of remote
signaling channel (1～5000ms)
Fixed-poin
t number
R/W
03、04/16
2
COMM1
19
SOE data reset (1: YES)
Fixed-poin
t number
R/W
03、04/16
2
COMM1
20-24
Reserve
Fixed-poin
t number
25
(Data 1) Milliseconds (integer)
Fixed-poin
t number
R
03、04
2
26
(Data 1) Seconds, minutes
(BCD code)
Fixed-poin
t number
R
03、04
2
27
(Data 1) hour, day (BCD code)
Fixed-poin
t number
R
03、04
2
28
(Data 1) Month, year (BCD code)
Fixed-poin
t number
R
03、04
2
29
(Data 1) There is an event channel
32-17
Fixed-poin
t number
R
03、04
2
30
(Data 1) There is an event channel
16-1
Fixed-poin
t number
R
03、04
2
31
(Data 1) Channel event status
32-17
Fixed-poin
t number
R
03、04
2
32
(Data 1) Channel event status 16-1
Fixed-poin
t number
R
03、04
2
.
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7
#：Meter identification code: ARTU remote signal unit 201
Note: SOE address from 25 to 12824, total 12,800 *2=25600 bytes;1600 sets of data (each set of data is 16 bytes,
it is recommended that users read 16 bytes continuously to avoid reading errors);1600 data loop stores.It is
recommended that the user first read the SOE counter, and that the address of the SOE record that recently occurred
is the contents of address 11.
Examples:
25
(Data 1) Milliseconds (integer)
26
(Data 1) Second Minutes (BCD code)
27
(Data 1)hour day (BCD code)
28
(Data 1) Month year (BCD code)
29
(Data 1) Channel has events 32-17
30
(Data 1) Channel has events 16-1
31
(Data 1) Channel event status 32-17
32
(Data 1) Channel event status 16-1
Address 25: The millisecond hexadecimal 03 45H event takes place is 837 milliseconds
Address 26: The seconds in which the event occurred (seconds before and after) are 45 minutes and 23 seconds
for BCD code 23 45H
Address 27: The time of the event (time after the previous day) BCD code 12 30H is 12 o 'clock on the 30th
Address 28: The month year of the incident (month after the year before last) BCD code 07 07H is July 2007
Address 29 and 30: Each bit corresponds to a channel, which corresponds to channel 32-1 in turn. The highest
value of address 29 is 1, which means that channel 32 has an event at this time, and 0, which means that no event has
occurred in this channel.
Address 31 and 32: If the corresponding bit of address 29 and 30 is 1, it means that an event has occurred in the
corresponding channel; if the bit is 1, it means that the channel hops from opening to closing; if the bit of address 29
and 30 is 0, the contents of the corresponding address 31 and 32 have no meaning.
Assume address 29 is 0x0002, address 30 is 0x0004, address 31 is 0x0002, address 32 is 0x0000 means channel
18 hops become closed and channel 3 hops become disconnected.
12817
(Data n) Ms (integer)
Fixed-poin
t number
R
03、04
2
12818
(Data n) seconds, minutes
(BCD code)
Fixed-poin
t number
R
03、04
2
12819
(Data n)hour, day (BCD code)
Fixed-poin
t number
R
03、04
2
12820
(Data n)Month, year (BCD code)
Fixed-poin
t number
R
03、04
2
12821
(Data n)There is an event channel
32-17
Fixed-poin
t number
R
03、04
2
12822
(Data n)There is an event channel
16-1
Fixed-poin
t number
R
03、04
2
12823
(Data n)Channel event status 32-17
Fixed-poin
t number
R
03、04
2
12824
(Data n)Channel event status 16-1
Fixed-poin
t number
R
03、04
2

8
5.1.4.2 DI reading state :(allow operation port COMM1)
Read the DI state of ARTU remote signal unit with MODBUS command 02
Among which 1=ON，0=OFF
Data address
Data content
Data type
Read/Write
Command
word
Numerical range
0000H
DI1
BIT
R
02
1=ON，0=OFF
0001H
DI2
BIT
R
02
1=ON，0=OFF
0002H
DI3
BIT
R
02
1=ON，0=OFF
0003H
DI4
BIT
R
02
1=ON，0=OFF
0004H
DI5
BIT
R
02
1=ON，0=OFF
0005H
DI6
BIT
R
02
1=ON，0=OFF
0006H
DI7
BIT
R
02
1=ON，0=OFF
0007H
DI8
BIT
R
02
1=ON，0=OFF
0008H
DI9
BIT
R
02
1=ON，0=OFF
0009H
DI10
BIT
R
02
1=ON，0=OFF
000AH
DI11
BIT
R
02
1=ON，0=OFF
000BH
DI12
BIT
R
02
1=ON，0=OFF
000CH
DI13
BIT
R
02
1=ON，0=OFF
000DH
DI14
BIT
R
02
1=ON，0=OFF
000EH
DI15
BIT
R
02
1=ON，0=OFF
000FH
DI16
BIT
R
02
1=ON，0=OFF
0010H
DI17
BIT
R
02
1=ON，0=OFF
0011H
DI18
BIT
R
02
1=ON，0=OFF
0012H
DI19
BIT
R
02
1=ON，0=OFF
0013H
DI20
BIT
R
02
1=ON，0=OFF
0014H
DI21
BIT
R
02
1=ON，0=OFF
0015H
DI22
BIT
R
02
1=ON，0=OFF
0016H
DI23
BIT
R
02
1=ON，0=OFF
0017H
DI24
BIT
R
02
1=ON，0=OFF
0018H
DI25
BIT
R
02
1=ON，0=OFF
0019H
DI26
BIT
R
02
1=ON，0=OFF
001AH
DI27
BIT
R
02
1=ON，0=OFF
001BH
DI28
BIT
R
02
1=ON，0=OFF
001CH
DI29
BIT
R
02
1=ON，0=OFF
001DH
DI30
BIT
R
02
1=ON，0=OFF
001EH
DI31
BIT
R
02
1=ON，0=OFF
001FH
DI32
BIT
R
02
1=ON，0=OFF
5.1.4.3 GPS time correction function
The communication is in accordance with the NMEA agreement, and the supporting communication port is
COMM2. This unit only USES proofreading for date and time, so $GPZDA data format is adopted, specifically as
follows:
$GPZDA
Date & Time
Standard time format, day, month, year, local time.
$--ZDA,hhmmss.sss,xx,xx,xxxx,xx,xx
hhmmss.sss = UTC(Standard time format)

9
xx = Day，01 to 31
xx = Month，01 to 12
xxxx = Year
xx = Local time difference 00 to +/- 13 hours
xx = Local time difference (simultaneous difference)
Examples：
GPS send：$GPZDA,020102.012,05,11,2007，
To ASC Ⅱ for：24 47 50 5A 44 41 2C 30 32 30 31 30 32 2E 30 31 32 2C 30 35 2C 31 31 2C 32 30 30 37 2C
That is, the unit time is set as: November 5, 2007 2:01:02
5.1.5 Communication examples
Example 1: Read the current switching state of the remote signaling unit with meter address 2
Send：0x02,0x03,0x00,0x10,0x00,0x02,0xC5,0xFD
Return：0x02,0x03,0x04,0x00,0x00,0x00,0x03,0x89,0x32
Description: the first and second channel switches of the remote signaling unit with instrument address 2 are closed,
and the remaining 30 channel switches are disconnected.
Example 2: Read 1 to 5 switch states
Send：0x01,0x02,0x00,0x00,0x00,0x05,0xB8,0x09
Return：0x01,0x02,0x01,0x10,0xA0,0x44
Description: 0x 10 is converted into a binary number of 00010000, that is, the fifth switch is in a closed state, the
others are in an open state.
Example 3: Read the state of 1 to 32 switches
Send：0x01,0x02,0x00,0x00,0x00,0x20,0x79,0xD2
Return：0x01,0x02,0x04,0x00,0x00,0x8E,0x04,0x9F,0x81
Description: 0x00,0x00,0x8E,0x04 are converted into binary Numbers of 0000,0000,0000, 1000, 11, 0000,0100, that
is, the 18th 19 20 24 27 switch state is closed, the others are open state.
Example 4: Read the state of 17 to 32 switches
Send：0x01,0x02,0x00,0x10,0x00,0x10,0x78,0x03
Return：0x01,0x02,0x02,0x8E,0x04,0xDD,0xDB
Description: 0x8E,0x04 are converted into binary number of 1000,1110,0000,0100, that is, the 18th 19, 20, 24, 27
switch state is closed, the others are open state.
Example 5: Set the current time
Send：0x01,0x10,0x00,0x05,0x00,0x04,0x08,0x12,0x14,0x10,0x21,
0x09,0x07,0x00,0x01,0xA3,0xA8
Return：0x01,0x10,0x00,0x05,0x00,0x04,0xD1,0xCB
Description:The time is set to 10:14:00 12sec on September 21, 2007 (note the BCD code format).
Example 6: Set the shaking elimination time of remote signaling unit with meter address 1
Send：0x01,0x10,0x00,0x12,0x00,0x01,0x02,0x00,0x04,0xA4,0xE1
Return：0x01,0x10,0x00,0x12,0x00,0x01,0xA1,0xCC
Description: shake time set 4 ms (shake elimination time: in the vibration environment, travel switch or button is
often because the jitter and signal error, a shaking of the general time is shorter, according to the characteristics of the
jitter time is short, can be set up by ARTU remote communication unit to eliminate jitter of the shaking time
elimination of reliable signal effectively, so as to achieve the purpose of the anti-interference).

10
5.2 ARTU-KJ8 Remote signal and remote control combination
5.2.1 Overview
ARTU-KJ8 remote signal and remote control combination unit is a combination unit of switch volume
acquisition and remote relay output specially developed for intelligent distribution, industrial automation and other
fields, which realizes data exchange with upper computer monitoring system through communication
5.2.2 Technical Parameter
Performance
Indicators
Switching input
Relay output
Input/output
loop
8
8
Input/output
mode
Passive dry contact
8-channel relay output (pulse or hold mode)
Bus way
Half duplex RS485 (Modbus RTU),
three-core shielding wire is recommended
Half duplex RS485 (Modbus RTU),
three-core shielding wire is recommended
Bus capacity
≤32
≤32
Switch event
resolution
The ability to distinguish successive
displacement of multiple contacts, with the
displacement interval of any two contacts
greater than 1 millisecond.
/
Remote
scanning speed
The scanning time of all channels for one
week is 1ms
/
Remote signal
debouncing time
All channels adopt a unified debuffing time
of 1ms(configurable)
/
5.2.3 Installation and wiring
5.2.3.1 Installation and outline size
Standard track TS35 (see Appendix)
5.2.3.2 Wiring terminal no.

11
5.2.4 Communication instruction
5.2.4.1 Read-write register contents
Modbus function code 03 (03H) and 04 (04H) can be used to access all contents of the address table, and
function code 16 (10H) can be used to write continuous register data.
Data
address
Data content
Data type
Read/
Write
Command
word
Data
Length(byte)
00
Meter identification code #
Fixed-point
number
R
03、04
2
01
Version
Fixed-point
number
R
03、04
2
02
Address(1～247)
Fixed-point
number
R/W
03、04/16
2
03
Communication baud rate(38400、19200、
9600、4800、2400、1200)
Fixed-point
number
R/W
03、04/16
2
04
Communication verification mode (Note 1)
Fixed-point
number
R/W
03、04/16
2
05-11
Reserve
Fixed-point
number
R
03、04
2
12
Current status of remote control channel
(Note 2)
High 8-bit DI, low 8-bit DO,
Bit0 ~ BIT7 corresponds to DO1 ~ DO8
Bit8 ~ BIT15 corresponds to DI1 ~ DI8
Fixed-point
number
R/W
2
13-15
Reserve
Fixed-point
number
R
03、04
2
16
Current state of remote signaling channel
(Note 2)
Bit0 is the first channel of DI1, Bit1 is the
second channel of DI2, and so on
Fixed-point
number
R
03、04
2
17
Current status of remote control channel
(Note 2)
Bit0 is the first channel of DO1, Bit1 is the
second channel of DO2, and so on
Fixed-point
number
R/W
03、04/16
2
18
Remote signal channel debouncing
time(1～1000ms)
Fixed-point
number
R/W
03、04/16
2
19
Reserve
Fixed-point
number
R/W
03、04/16
2
20
Duration of digital output DO1 (Note 3)
Fixed-point
number
R/W
03、04/16
2
21
Digital output DO2 duration
Fixed-point
number
R/W
03、04/16
2
22
Digital output DO3 duration
Fixed-point
number
R/W
03、04/16
2
23
Digital output DO4 duration
Fixed-point
number
R/W
03、04/16
2

12
24
Digital output DO5 duration
Fixed-point
number
R/W
03、04/16
2
25
Digital output DO6 duration
Fixed-point
number
R/W
03、04/16
2
26
Digital output DO7 duration
Fixed-point
number
R/W
03、04/16
2
27
Digital output DO8 duration
Fixed-point
number
R/W
03、04/16
2
#：Metre identification code：ARTU-K8J8 is 204 (0xC8)
Note 1 address 04 (Description of communication verification mode) :
0:1 start bit, 8 data bits, 1 stop bit
1:1 start bit, 8 data bits, 2 stop bits
2:1 bit start, 8 bit data, parity, 1 bit stop
3:1 bit start, 8 bit data, odd check, 1 bit stop
Note 2 Current state of channel: 1 is ON for closure and 0 is OFF for disconnection.
Note 3 Duration of digital output: the setting range is 0 ~ 10,000ms, and the factory default is 0ms.You can change
the mode of the digital output by setting the output duration.When the duration is 0, it is the ordinary relay
mode;When the duration is greater than 0, the digital output is pulse relay mode, and the output duration is the set
length of time.
DO state reading:
Read the DO status with MODBUS command 01.
Among which 1=ON, 0=OFF
Data ADD
Data
content
Data types
Read/W
rite
Comman
d word
Numerical range
0000H
DO1
BIT
R
01
1=ON，0=OFF
0001H
DO2
BIT
R
01
1=ON，0=OFF
0002H
DO3
BIT
R
01
1=ON，0=OFF
0003H
DO4
BIT
R
01
1=ON，0=OFF
0004H
DO5
BIT
R
01
1=ON，0=OFF
0005H
DO6
BIT
R
01
1=ON，0=OFF
0006H
DO7
BIT
R
01
1=ON，0=OFF
0007H
DO8
BIT
R
01
1=ON，0=OFF
Setting of DO state:
Switch output control is written by MODBUS no. 05 command.
Switch output numeric storage address, each address in the data frame is 1bit storage (1bit).
Write 0XFF00 to ON (close) and 0X0000 to OFF (open), and the other values will not affect DO
Data ADD
Data
content
Read/Write
Comman
d word
Numerical range
0000H
DO1
W
05
0XFF00=ON，0X0000=OFF
0001H
DO2
W
05
0XFF00=ON，0X0000=OFF
0002H
DO3
W
05
0XFF00=ON，0X0000=OFF
0003H
DO4
W
05
0XFF00=ON，0X0000=OFF
0004H
DO5
W
05
0XFF00=ON，0X0000=OFF

13
0005H
DO6
W
05
0XFF00=ON，0X0000=OFF
0006H
DO7
W
05
0XFF00=ON，0X0000=OFF
0007H
DO8
W
05
0XFF00=ON，0X0000=OFF
Reading DI state :(allow operation port COMM1)
Read DI status with MODBUS command 02.
Among which 1=ON, 0=OFF
Data ADD
Data content
Data types
Read/Write
Command
word
Numerical range
0000H
DI1
BIT
R
02
1=ON，0=OFF
0001H
DI2
BIT
R
02
1=ON，0=OFF
0002H
DI3
BIT
R
02
1=ON，0=OFF
0003H
DI4
BIT
R
02
1=ON，0=OFF
0004H
DI5
BIT
R
02
1=ON，0=OFF
0005H
DI6
BIT
R
02
1=ON，0=OFF
0006H
DI7
BIT
R
02
1=ON，0=OFF
0007H
DI8
BIT
R
02
1=ON，0=OFF
5.2.5 Communication Example
Example 1: Read the current switching state of the remote signaling unit with meter address 2
Send: 0x02,0x03,0x00,0x0C,0x00,0x01,0x44,0x3A
Return: 0x02,0x03,0x02,0x03,0x00,0xFC,0xB4
Description: the first and second channel switches of the remote signaling unit with instrument address 2 are
closed.
Example 2: Read 1 to 5 switch states
Send: 0x01,0x02,0x00,0x00,0x00,0x05,0xB8,0x09
Return: 0x01,0x02,0x01,0x10,0xA0,0x44
Description: 0x10 is converted into a binary number of 00010000, that is, the fifth switch is in the closed state,
the others are in the open state.
Example 3: Read relay state 1 to 5
Send: 0x01,0x01,0x00,0x00,0x00,0x05,0xFC,0x09
Return: 0x01,0x01,0x01,0x0C,0x51,0x8D
Description: 0C is converted into binary number of 01100, that is, the relay in the 3rd and 4th channels is in
closed state, the other 3 channels are in open state, and the high 3 bits are filled with 0, which does not represent
any meaning.
Example 4: Closing the first relay
Send: 0x01,0x05,0x00,0x00,0xFF,0x00,0x8C,0x3A
Return: 0x01,0x05,0x00,0x00,0xFF,0x00,0x8C,0x3A
Example 5: Set the relay of the first line as the pulse output of 3 seconds, that is, the communication control will
automatically disconnect after 3 seconds of closure
Send: 0x01,0x10,0x00,0x14,0x00,0x01,0x02,0x0B,0xB8,0xA2,0x06
Return: 0x01,0x10,0x00,0x14,0x00,0x01,0x41,0xCD

14
5.2 Appendix
5.3 Setting of dial code switch
5.3.1 Definition of dial code
1
2
3
4
5
6
7
8
9
10
Address setting
1 0 0 0 0
Baudrate
setting
0 0
Mode
setting
0
Communication
mode
0 0
5.3.2 Add setting
Dial code1
Dial code2
Dial code3
Dial code4
Dial code5
Add
1
0
0
0
0
1
0
1
0
0
0
2
- - - - - - -- - - - -- - - - - -- - - - - -- -
1
1
1
1
1
31
0
0
0
0
0
32
5.3.3 Baud rate setting
Baudrate
Dial code 6
Dial code 7
9600bps
0
0
4800bps
1
0
38400bps
0
1
19200bps
1
1
5.3.4 Mode setting
Dial code
8
Note: Dial code 8 and reset the address
or baud rate to work in the new
communication mod
Meter local setting address, baud rate
0
Host computer sets the address and baud
rate
1
5.3.5 Format setting
Mode
Dial
code9
Dial
code10
10 bits: 1 start bit, 8 data bits, 1 stop bit
0
0
11 bits: 1 bit start, 8 bits data, 2 bits stop (reserved)
1
0
11 bits: 1 bit start, 8 bit data, parity, 1 bit stop
0
1
11 bits: 1 bit start, 8 bit data, odd check, 1 bit stop
1
1
Note: Dial code switch status description: 1: OFF, 0: ON
5.4 Modbus Function code description
5.4.1 Abnormal reply format of ARTU remote terminal unit to command received in error
ARTU remote terminal unit communication exception code reply format
Add
Corresponding error function
Exception error code data
CRC check
BYTE
BYTE
BYTE
WORD
XX
XX (requested function code
+80H)
01H、02H、03H、04H
XXXX (CRC check value)

15
The exception code is defined as follows:
01 Illegal function codes (received function codes are not supported);
02 Invalid data location (specified data location is beyond the scope of the meter);
03 Invalid data value (received data value sent to the host is beyond the data range of the corresponding address).
04 Equipment failure from the station (the data value received to the host is not currently allowed to be written)
5.4.2 Functional status of 01H/02H using Modbus
Upper computer required reading (01H/02H function of MODBUS)
ADD
Description
ADD
Data
CRC check
BYTE
BYTE
WORD
WORD
WORD
XX
XX(01H/02H)
XXXX
XXXX
XXXX( CRC check value)
Lower device reply(MODBUS function 01/02)
ADD
Function
Data length
Data
CRC check
BYTE
BYTE
BYTE
N BYTE
WORD
XX
XX(01H/02H)
XX
XXXX…….
XXXX( CRC check value)
Abnormal Lower device reply (MODBUS function of 81H/82H)
ADD
Corresponding
error function
Exception error code data
CRC check
BYTE
BYTE
BYTE
WORD
XX
XX(81H/82H)
XX (02H wrong address, 03H wrong
data)
XXXX( CRC check value)
5.4.3 Read using Modbus's functions of 03 or 04
Upper computer required reading (03H/04H function of MODBUS)
ADD
Function
Start address
Data
CRC check
BYTE
BYTE
WORD
WORD
WORD
XX
XX(03H/04H)
XXXX
XXXX(N)
XXXX( CRC check value)
Lower device reply (03H/04H function of MODBUS)
ADD
Function
Data length
Data
CRC check
BYTE
BYTE
BYTE
2*N BYTE
WORD
XX
XX(03H/04H)
XX(2*N)
XXXX…….
XXXX( CRC check value)
Abnormal Lower device reply(MODBUS 83H/84H function)
ADD
corresponding
error function
Exception error code data
CRC check
BYTE
BYTE
BYTE
WORD
XX
XX(83H/84H)
XX (02H wrong address, 03H wrong data)
XXXX( CRC check value)
5.4.4 Use the 05H function of Modbus to force the alarm state
Upper computer required reading (05H function of MODBUS)
ADD
Function
ADD
Data
CRC check
BYTE
BYTE
WORD
WORD
WORD

16
XX
XX(05H)
XXXX
0ff00H 或0000H
XXXX( CRC check value)
Lower device reply(MODBUS 05 functions)
ADD
Function
ADD
Data
CRC check
BYTE
BYTE
WORD
WORD
WORD
XX
XX(05H)
XXXX(same as
the upper
computer
request)
XXXX(same as
the upper
computer
request)
XXXX( CRC check value)
Abnormal Lower device reply(MODBUS 08 functions)
ADD
corresponding
error function
Exception error code data
CRC check
BYTE
BYTE
BYTE
WORD
XX
XX(85H)
XX(Wrong address for 02H, wrong
data for 03H)
XXXX( CRC check value)
5.4.5 Use the 06H function of Modbus to write single data
Upper computer requires to write a single data (MODBUS's 06H function)
ADD
Function
Start address
Data
CRC check
BYTE
BYTE
WORD
WORD
WORD
XX
XX(06H)
XXXX
XXXX
XXXX( CRC check value)
Abnormal Lower device reply(MODBUS 06H function)
ADD
Function
Start address
Data
CRC check
BYTE
BYTE
WORD
WORD
WORD
XX
XX(06H)
XXXX
XXXX
XXXX( CRC check value)
Abnormal Lower device reply(MODBUS 86H function)
ADD
corresponding
error function
Exception error code data
CRC check
BYTE
BYTE
BYTE
WORD
XX
XX(86H)
XX (02H address wrong, 03H data wrong,
04 not allowed to write)
XXXX( CRC check
value)
5.4.6 Use Modbus's 10H function to write multiple data
Host computer requires to write multiple data (MODBUS's 16 (10H) function)
ADD
Function
Start
address
Data
number
Data length
Data
CRC check
BYTE
BYTE
WORD
WORD
BYTE
2*N BYTE
WORD
XX
XX (10H)
XXXX
XXXX(n)
XX(2*n)
XXXX……
.
XXXX( CRC check
value)
Lower device reply(MODBUS's 16 (10H) functions)
ADD
Function
Start address
Data number
CRC check
BYTE
BYTE
WORD
WORD
WORD

17
XX
XX(10H)
XXXX
XXXX
XXXX( CRC check value)
Abnormal Lower device reply(90H function of MODBUS)
ADD
Corresponding
error function
Exception error code data
CRC check
BYTE
BYTE
BYTE
WORD
XX
XX(90H)
XX (02H address wrong, 03H data wrong,
04 not allowed to write
XXXX( CRC check
value)
5.5 Communication wiring method
Note: Figure 1 is the best wiring method
Figure 2 is wiring method of few products