Acrel ARTU Series User manual

426
ARTU Series of Remote Terminal Units
Installation and Operation Manual V1.0
Acrel Co., Ltd.
Sales manager：Tim Ma
Tel/whatsapp/wechat：86 18761599716
E-mail：[email protected]
Website: www.acrel.gr

Declaration
All rights reserved. Without written permission of the Company, no paragraph or
chapter in this Manual shall be extracted, copied, or reproduced or disseminated in any
form; otherwise, all consequences shall be borne by the offender.
The Company reserves all legal rights.
The Company reserves the right to modify the product specifications described in the
Manual without prior notice.
Before ordering, please consult your local agent for the latest specifications of the
product.

Contents
1. General.................................................................................................................................................. 1
2. Model description..................................................................................................................................1
3. Technical Parameters.............................................................................................................................2
4. Installation and Wiring.......................................................................................................................... 3
4.1 Outline dimensions...................................................................................................................................... 3
4.2 Installation methods.....................................................................................................................................3
4.3 Wiring.......................................................................................................................................................... 4
4.5 Application examples...................................................................................................................................6
5 Communication Description.................................................................................................................. 7
5.1 Full parameter information of instrument....................................................................................................7
5.2 Instrument event record information......................................................................................................... 11
5.3 Read DI state..............................................................................................................................................12
5.4 Read DO state............................................................................................................................................ 13
5.5 Communication examples......................................................................................................................... 13
5.6 Detailed explanation of analog input and output signals...............................................................................13
6. Appendixes.......................................................................................................................................... 15
6.1 Dial switch settings................................................................................................................... 15
6.2 Modbus function code description........................................................................................................... 15
7 Communication Connection Modes.....................................................................................................17
8 Debugging and Maintenance................................................................................................................17
8.1 Operation instructions................................................................................................................................17
8.2 Debugging..................................................................................................................................................18

1
1. General
The ARTU series of remote terminal units are high performance intelligent distribution components, which are
applied in intelligent distribution, industrial automation and other fields, the ARTU100 series of remote terminal units
can provide switch input, switch output, analog input and analog output, and can transmit the collected signals to the
background through RS485 serial ports, RJ45 Ethernet interfaces, and 2G, Lora and 4G wireless communication.
Conforming standards:
GB/T 19582.1-2004
Modbus industrial automation network specification.
Part 1: Modbus application protocol
GB/T 19582.2-2008
Modbus industrial automation network specification.
Part 2: Modbus protocol implementation guide over serial link
GB/T13729-2002
Remote terminal unit equipment
DL/T630—1997
Technical requirement for RTU with AC electrical quantities input
discrete sampling
DL/T 634.5101-2009
Tele-control equipment and systems. Part 5-101: Transmission
protocols
DL/T 634.5104-2009
Tele-control equipment and systems. Part 5-104: Transmission
protocols
2. Model description
ARTU100
Function code：
MKA18：18-path DI (active AC 220V)
MK18：18-path DI (passive)
MJ16：16-path DO MA84：8-path AI、4-path AO
CE：1 path ethernet MPOW：power module
product model
/
Function code：
KJ8：8-path DI、8-path DO
K16：16-path DI
K32：32-path DI
Note：MPOW power module must be selected when module is selected.

2
3. Technical Parameters
Subject:
Power supply
AC/DC 85-265V、DC48V
Power
consumption
≤9W (excluding modules); ≤15W (including modules, up to 3 modules)
Model
ARTU100-K32
32-path DI (active/passive, optional)
ARTU100-K16
16-path DI (active/passive, optional)
ARTU100-KJ8
8-path DI (active/passive, optional); 8-path DO, output mode:
relay normally-open contact output, contact capacity:
AC 250V/3A DC 30V/3A;
Communication
485
communication
RS485
interface
2-path 485 communication; Modbus-RTU protocol;
baud-rate 1200 ~ 38400bps
Others
Dial switch
10 bits
Indicator light
20 indicator lights
Optional features:
Model
CE
1 path ethernet
TCP/IP protocol；10M/100M self-adaptive
MKA18+MPOW
Switch input
18-path DI (active AC 220V)
MK18+MPOW
Switch input
18-path DI (passive)
MJ16+MPOW
Switch output
16-path DO output mode: Relay normally-open
contact output
MA84+MPOW
Analog input
8-path AI; 0-5V, 1-5V, 4-20mA, 0-20mA, optional
Analog output
4-path AO; 0-5V, 1-5V, 4-20mA, 0-20mA,
optional
AWT100-2G
2G
communication
terminal
AWT100-Lora
Lora
communication
terminal
AWT100-LW
LoRAWAN
communication
terminal
AWT100-NB
NB-IoT
communication
terminal
AWT100-4G
4G
communication
terminal

3
Other technical parameters:
Security
Working
withstand
voltage
Power-frequency withstand voltage: Shell and power supply,
switch input, switch output, analog input, analog output,
communication, AC 2kV 1min; AC 2kV 1min between power
supply and switch output; AC 1kV 1min between analog input and
analog output and between communication and switch input;
Insulation
resistance
Input and output end to housing > 100MΩ;
Electromagnetic
compatibility
Superior to level 3
Environment
Working temperature: -20℃~+60℃;
Storage temperature: -40℃~+70℃;
Relative humidity :≤95% without condensation;
Altitude: ≤2500m;
4. Installation and Wiring
4.1 Outline dimensions
4.2 Installation methods
Guide rail and wall-hanging double installation methods are used.

4
4.3 Wiring
Subject:
ARTU100-K32:
A1 B1 A2 B2
DI2 DI3 DI4 DI5 DI6 DI7 DI8 DI1
21 22 24 25 26 30 31 32 33 34 35 36 38 3937 40
40
DI9
48 3938
47
46
4544
4342
KGND
4121
KCOM
KV12
DI16
DI15
DI14
DI13
DI12DI11
DI10
N-L+
32DI:
COM1
KV12
6461 6362605958
57
56
5554
53
52
51
50
49
DI29
DI28
DI27
DI26
DI25
DI24
DI23
DI22DI21
DI20
DI19DI18
DI17 DI32
DI31
DI30
KGNDKCOM
38 39 40
KGNDKCOM
KV12
ARTU100-K16:
16DI:
A1 B1 A2 B2
DI2 DI3 DI4 DI5 DI6 DI7 DI8
DI1
21 22 24 25 26 30 31 32 33 34 35 36 38 3937 40
40
DI9
48 3938
47
46
4544
4342
KGND
41
7
17
5
21
KCOM
KV12
DI16
DI15
DI14
DI13
DI12DI11
DI10
N-L+
COM1 KGNDKCOM
KV12
ARTU100-KJ8:
30 31 32 33 34 35 36 38 3937 40
1614 1815171312111098
7
6
5
21
21 22 24 25 26

5
Modules:
MK18: MKA18:
MJ16: MA84:
4.4 Indicator light status description
Subject:
Specifications
K16/K32/K8
KJ8
Indicator light
description
1. POW refers to the power light.
2. COM refers to the communication light.
3. EXT refers to the module communication light.
4. The number refers to the channel number (for example, K16 refers to DI1-DI16), the odd number
refers to the red light, and the even number refers to the green light.
(See the table below for specific information of indicator lights.)

6
Modules:
Specifications
MKA18/MK18
MJ16
MA84
MPOW
Indicator light
description
1. POW refers to the power light.
2. The number refers to the channel number, the odd number refers to the red light, and the even
number refers to the green light.
(See the table below for specific information of indicator lights.)
4.5 Application examples
a) Wiring diagram of passive dry contacts:
1# Passive input node
KV12
K01
K02
K03
K16/32
KCOM
KG
2# Passive input node
3# Passive input node
16/32# Passive input node
Short
circuit
ARTU-K16/32
Not lit
Lit
Green
Red
Normally
on
Flashing
Normally
on
Flashing
POW
No power
/
Normal power
/
/
COM
No
communication
/
COM1, normal
communication
/
COM2, normal
communication
EXT
No connected
modular
/
Connected modular and
normal communication
/
Normal communication
but failed
communication
DI, DO, AI, AO
status light
No status
Normal
working
/
Normal
working
/

7
b) Wiring diagram of active wet contacts:
KV12
K01
K02
K03
16/32
KCOM
KG
12V+
1# Active input node
2# Active input node
3# Active input node
16/32# Active input node
12V-
5 Communication Description
5.1 Full parameter information of instrument
Modbus function code 03(03H)、04(04H) can be used to access all contents in the address table ,and function
code 16(10H) can be used to write continuous register data.
Address
Name
Data type
Read/write
Length
Remarks
0x1000
Addr1
Uint16
R/W
2
1-247 universal address：250
0x1001
Baud1
Uint16
R/W
2
0：1200 1：2400
2：4800 3：9600
4：19200 5：38400
0x1002
Check1
Uint16
R/W
2
0：no check；1：odd check；2：even check
0x1003
Stop1
Uint16
R/W
2
0：1stop bit；1：2stop bit
0x1004
Baud2
Uint16
R/W
2
0：1200 1：2400
2：4800 3：9600
4：19200 5：38400
0x1005
Check2
Uint16
R/W
2
0：no check；1：odd check；2：even check
0x1006
Stop2
Uint16
R/W
2
0：1stop bit；1：2stop bit
0x1007
Baud3
Uint16
R/W
2
0：1200 1：2400
2：4800 3：9600
4：19200 5：38400
0x1008
Check3
Uint16
R/W
2
0：no check；1：odd check；2：even check
0x1009
Stop3
Uint16
R/W
2
0：1stop bit;
1：2stop bit
0x102C
SysTime-year/month
Uint16
R/W
2
high：year Low：month
0x102D
SysTime-day/hour
Uint16
R/W
2
high：day Low:time
0x102E
SysTime-minutes/second
Uint16
R/W
2
high：minutes Low：second

8
0x1450-0x1451
IP Address
Uint16
R/W
4
0x1450：high 192 low168
0x1451：high 0 low 100
0x1452-0x1453
Subnet Mask
Uint16
R/W
4
0x1452：high 255 low 255
0x1453：high 255 low 0
0x1454-0x1455
Gateway Address
Uint16
R/W
4
0x1454：high 192 low168
0x1455：high 0 low0
0x1456
Port Number 1
Uint16
R/W
2
Default 5000
0x1457
Port Number 2
Uint16
R/W
2
Default 5001
0x1458
Port Number 3
Uint16
R/W
2
Default 5002
0x1459
Port Number 4
Uint16
R/W
2
Default 5003
0x2000
Main style
Uint16
R
2
High bit
1:ARTU100 2:ARTU100/CE
Low bit
1:K32 2:K16 4:K8J8
0x2001
Main Version
Uint16
R
2
Such as：100 is V1.00
0x2002
Main Software
Uint16
R
2
0x2003
Model1 style
Uint16
R
2
1:MKA18 2: MJ16 3: MA84 4:MK18
0x2004
Model1 Version
Uint16
R
2
Such as：100 is V1.00
0x2005
Model1 Software
Uint16
R
2
0x2006
Model2 style
Uint16
R
2
1:MKA18 2: MJ16 3: MA84 4:MK18
0x2007
Model2 Version
Uint16
R
2
Such as：100 is V1.00
0x2008
Model2 Software
Uint16
R
2
0x2009
Model3 style
Uint16
R
2
1:MKA18 2: MJ16 3: MA84 4:MK18
0x200A
Model3 Version
Uint16
R
2
Such as：100 is V1.00
0x200B
Model3 Software
Uint16
R
2
0x2100
Clean SOE Record
Uint16
W
2
Write in 0xA8B8 clear event record
0xDE00
SOE Record Num
Uint16
R
2
1-100
0xFF21-0xFF23
Order Num
Uint16
R
2
0x FF21:1 2 3 4
0x FF22:5 6 7 8
0x FF23: 9 10 11 12
DO parameters setting
0x5000
DO16-1 Statue
Uint16
R/W
2
0：opening 1：closing
0x5001
DO32-17 Statue
Uint16
R/W
2
0：opening 1：closing
0x5002
DO48-33 Statue
Uint16
R/W
2
0：opening 1：closing
0x5003
DO56-49 Statue
Uint16
R/W
2
0：opening 1：closing
0x5008
DO16-1 Start Statue
Uint16
R/W
2
0：opening 1：closing
0x5009
DO32-17 Start Statue
Uint16
R/W
2
0：opening 1：closing

9
0x500A
DO48-33 Start Statue
Uint16
R/W
2
0：opening 1：closing
0x500B
DO56-49 Start Statue
Uint16
R/W
2
0：opening 1：closing
0x5300
DO1 Time
Uint16
R/W
2
unit：second
0x5301
DO2 Time
Uint16
R/W
2
unit：second
0x5302
DO3 Time
Uint16
R/W
2
unit：second
0x5303-0x5337
DO4 Time – DO56 Time
Uint16
R/W
2
unit：second
DI parameters setting
0x5010
DI16-1 Statue
Uint16
R
2
0：opening 1：closing
0x5011
DI32-17 Statue
Uint16
R
2
0：opening 1：closing
0x5012
DI48-33 Statue
Uint16
R
2
0：opening 1：closing
0x5013
DI64-49 Statue
Uint16
R
2
0：opening 1：closing
0x5014
DI80-65 Statue
Uint16
R
2
0：opening 1：closing
0x5015
DI86-81 Statue
Uint16
R
2
0：opening 1：closing
0x5018
DI16-1 Start Statue
Uint16
R
2
0：opening 1：closing
0x5019
DI32-17 Start Statue
Uint16
R
2
0：opening 1：closing
0x501A
DI48-33 Start Statue
Uint16
R
2
0：opening 1：closing
0x501B
DI64-49 Start Statue
Uint16
R
2
0：opening 1：closing
0x501C
DI80-65 Start Statue
Uint16
R
2
0：opening 1：closing
0x501D
DI86-81 Start Statue
Uint16
R
2
0：opening 1：closing
0x5100
DI1 Time
Uint16
R/W
2
unit：MS
0x5101
DI2 Time
Uint16
R/W
2
unit：MS
0x5102
DI3Time
Uint16
R/W
2
unit：MS
0x5103-0x5155
DI4 Time- DI86 Time
Uint16
R/W
2
unit：MS
0x5200
DI1 P-Time
Uint16
R/W
2
unit：MS
0x5201
DI2 P-Time
Uint16
R/W
2
unit：MS
0x5202
DI3 P-Time
Uint16
R/W
2
unit：MS
0x5203-0x5255
DI 4P-Time-DI86P-Time
Uint16
R/W
2
unit：MS
0x5600
DI1 Pulse
Uint16
R
2
unit：order
0x5601
DI2 Pulse
Uint16
R
2
unit：order
0x5602
DI3 Pulse
Uint16
R
2
unit：order
0x5603-0x5655
DI4 Pulse- DI86 Pulse
Uint16
R
2
unit：order
Up to 86 DI Pulses
0x56A0
DI Pulse initial value
Uint16
R
2
Up to 86 DI Pulses
AI parameters setting
0x5080
AI1 Statue
Int16
R
2
See 5.6 detailed explanation of analog
input and output signals

10
0x5081
AI2 Statue
Int16
R
2
0x5082
AI3 Statue
Int16
R
2
0x5083-0x5097
AI4 Statue- AI24 Statue
Int16
R
2
0x50C0
AI1 Statue
Uint16
R
2
The actual signal is the data divided
by 10. for example，the actual signal
of the voltage of 5000 pairs is 5V.
the actual current signal
corresponding to 20000 is 20mA.
0x50C1
AI2 Statue
Uint16
R
2
0x50C2
AI3 Statue
Uint16
R
2
0x50C3-0x50D7
AI4 Statue- AI24 Statue
Uint16
R
2
00x5500
AI1 Style
Uint16
R/W
2
1：0-20mA 2：4-20mA 3：0-5V 4：1-5V
0x5501
AI 1High
Int16
R/W
2
The actual signal is the data divided
by 10. for example，the actual signal
of the voltage of 5000 pairs is 5V.
the actual current signal
corresponding to 20000 is 20mA.
0x5502
AI1 Low
Int16
R/W
2
The actual signal is the data divided
by 10. for example，the actual signal
of the voltage of 5000 pairs is 5V.
the actual current signal
corresponding to 20000 is 20mA.
0x5503
AI2 Style
Uint16
R/W
2
1：0-20mA 2：4-20mA 3：0-5V 4：1-5V
0x5504
AI2 High
Int16
R/W
2
0x5505
AI2 Low
Int16
R/W
2
0x5506
AI3 Style
Uint16
R/W
2
1：0-20mA 2：4-20mA 3：0-5V 4：1-5V
0x5507
AI3 High
Int16
R/W
2
0x5508
AI3 Low
Int16
R/W
2
0x5509-0x5547
AI4 Style、 AI4 High、 AI4 Low
-
AI24 Style、 AI24 High、 AI24
Low
Uint16
Int16
Int16
R/W
2
1：0-20mA 2：4-20mA
3：0-5V 4：1-5V
0x50A8
AI Shielding Value
Uint16
R/W
2
5 is 5‰
AO parameters setting
0x50B0
AO1 Statue
Int16
R/W
2
The actual signal is the data divided
by 10. for example，the actual signal
of the voltage of 5000 pairs is 5V.
the actual current signal
corresponding to 20000 is 20mA.
0x50B1
AO2 Statue
Int16
R/W
2

11
0x50B2
AO3 Statue
Int16
R/W
2
0x50B3-0x50BB
AO4 Statue- AO12 Statue
Int16
R/W
2
0x5400
AO1 Output type
Uint16
R/W
2
Output type：
1： 0-20mA 2： 4-20mA 3： 0-5V 4： 1-5V
0x5401
AO1 High
Int16
R/W
2
The actual signal is the data divided
by 10. for example，the actual signal
of the voltage of 5000 pairs is 5V.
the actual current signal
corresponding to 20000 is 20mA.
0x5402
AO1 Low
Int16
R/W
2
The actual signal is the data divided
by 10. for example，the actual signal
of the voltage of 5000 pairs is 5V.
the actual current signal
corresponding to 20000 is 20mA.
0x5403
AO2 Output type
Uint16
R/W
2
Output type：
1：0-20mA 2：4-20mA 3：0-5V 4：1-5V
0x5404
AO2 High
Int16
R/W
2
0x5405
AO2 Low
Int16
R/W
2
0x5406
AO3 Output type
Uint16
R/W
2
Output type：
1： 0-20mA 2： 4-20mA 3： 0-5V 4： 1-5V
0x5407
AO3 High
Int16
R/W
2
0x5408
AO3 Low
Int16
R/W
2
0x5400-0x5423
AO4 Output type、AO4 High、
AO4 Low
-
AO12 Output type、AO12
High、AO12 Low
Uint16
Int16
Int16
R/W
2
Input type：
1： 0-20mA 2： 4-20mA 3： 0-5V 4： 1-5V
5.2 Instrument event record information
The are 100 SOE from 0xD000 to 0xD960.It is recommended to read SOE Record Num first,and then calculate the
corresponding address of the target event record according to the index number of the event record.
Address
Name
Content
Type
Read/write
Length
Remarks
0xD000
Event record number
Current event record number
Uint16
R
2
0xD001
Action date
High byte：year Low byte：month
Uint16
R
2
0xD002
Action time
High byte：day Low byte：time
Uint16
R
2
0xD003
Action minutes and
seconds
High byte：minutes Low byte：seconds
Uint16
R
2
0xD004
Action MS
MS 0-999ms
Uint16
R
2
0xD005
Action channel
DI 16-1
Uint16
R
2
0xD006
Action channel
DI 32-17 is an incident
Uint16
R
2

12
0xD007
Action channel
DI 48-33 is an incident
Uint16
R
2
0xD008
Action channel
DI 64-49 is an incident
Uint16
R
2
0xD009
Action channel
DI 80-65 is an incident
Uint16
R
2
0xD00A
Action channel
DI 86-81 is an incident
Uint16
R
2
0xD00B
Action channel
DO 16-1 is an incident
Uint16
R
2
0xD00C
Action channel
DO 32-17 is an incident
Uint16
R
2
0xD00D
Action channel
DO 48-33 is an incident
Uint16
R
2
0xD00E
Action channel
DI 56-49 event status
Uint16
R
2
0xD00F
Action state
DI 16-1 event status
Uint16
R
2
0xD010
Action state
DI 32-17 event status
Uint16
R
2
0xD011
Action state
DI 48-33 event status
Uint16
R
2
0xD012
Action state
DI 64-49 event status
Uint16
R
2
0xD013
Action state
DO 80-65 event status
Uint16
R
2
0xD014
Action state
DO 86-81 event status
Uint16
R
2
0xD015
Action state
DO 16-1 event status
Uint16
R
2
0xD016
Action state
DO 32-17 event status
Uint16
R
2
0xD017
Action state
DO 48-33 event status
Uint16
R
2
0xD018
Action state
DO 56-49 event status
Uint16
R
2
0xD019-0xD9C3
Items 2 to 100 event records
Uint16
R
2
Note：each event record takes 23 addresses from the event record number to CRC,and the last address of each
event record is the check bit(meaningless)。
5.3 Read DI state
Read the DI status of ARTU telesignalling unit with modbus 02(02H) command
Address
Content
Type
Read/write
Remarks
0x0000
DI1 state
BIT
R
0：opening 1：closing
0x0001
DI2 state
BIT
R
0：opening 1：closing
0x0002
DI3 state
BIT
R
0：opening 1：closing
0x0003
DI4 state
BIT
R
0：opening 1：closing
0x0004
DI5 state
BIT
R
0：opening 1：closing
0x0005
DI6 state
BIT
R
0：opening 1：closing
0x0006
DI7 state
BIT
R
0：opening 1：closing
0x0007
DI8 state
BIT
R
0：opening 1：closing
0x0008
DI9 state
BIT
R
0：opening 1：closing
0x0009
DI10 state
BIT
R
0：opening 1：closing
0x000A
DI11 state
BIT
R
0：opening 1：closing

13
0x000B
DI12 state
BIT
R
0：opening 1：closing
0x000C
DI13 state
BIT
R
0：opening 1：closing
0x000D
DI14 state
BIT
R
0：opening 1：closing
0x000E
DI15 state
BIT
R
0：opening 1：closing
0x000F
DI16 state
BIT
R
0：opening 1：closing
0x0010-0x0055
DI17—DI86 state
BIT
R
0：opening 1：closing
5.4 Read DO state
Modbus function code 01(01H) can be used to access all contents in the address table ,and function code 05(05H) can
be used to write register data.
Address
Content
Read/write
Remarks
0x0000
DO1 state
R/W
0：opening 1：closing
0x0001
DO2 state
R/W
0：opening 1：closing
0x0002
DO3 state
R/W
0：opening 1：closing
0x0003
DO4 state
R/W
0：opening 1：closing
0x0004
DO5 state
R/W
0：opening 1：closing
0x0005
DO6 state
R/W
0：opening 1：closing
0x0006
DO7 state
R/W
0：opening 1：closing
0x0007
DO8 state
R/W
0：opening 1：closing
0x0008
DO9 state
R/W
0：opening 1：closing
0x0009
DO10 state
R/W
0：opening 1：closing
0x000A
DO11 state
R/W
0：opening 1：closing
0x000B
DO12 state
R/W
0：opening 1：closing
0x000C
DO13 state
R/W
0：opening 1：closing
0x000D
DO14 state
R/W
0：opening 1：closing
0x000E
DO15 state
R/W
0：opening 1：closing
0x000F
DO16 state
R/W
0：opening 1：closing
0x0010-0x0037
DO17—DO56 state
R/W
0：opening 1：closing
5.5 Communication examples
Example 1: Read the current switch status of the remote communication unit with instrument address 2.
Send: 0x02,0x03,0x50,0x10,0x00,0x02,0XD4,0xFD
Return: 0x02,0x03,0x04,0x00,0x00,0x00,0x03,0x89,0x32
Note: The first and second channel switches of the remote communication unit with instrument address 2 are
connected, and the remaining 30 channel switches are disconnected.
Example 2: Read the status of 1 to 5 switches
Send: 0x01,0x02,0x00,0x00,0x00,0x05,0xB8,0x09
Return: 0x01,0x02,0x01,0x10,0xA0,0x44

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Note: 0x 10 is converted to a binary number of 0001,000, that is, the fifth switch is in the connected status, and
the rest are in the disconnected status.
Example 3: Read the status of 1 to 32 switches.
Send: 0x01,0x02,0x00,0x00,0x00,0x20,0x79,0xD2
Return: 0x01,0x02,0x04,0x00,0x00,0x8E,0x04,0x9F,0x81
Note: 0x00,0x00,0x8E,0x04 are converted to binary numbers of 0000,0000,0000,0000,1000,1110,0000,0100,
that is, the switches of paths 18, 19, 20, 24 and 27 are in the connected status, and the rest are in the disconnected
status.
Example 4: Read the status of 17 to 32 switches.
Send: 0x01,0x02,0x00,0x10,0x00,0x10,0x78,0x03
Return: 0x01,0x02,0x02,0x8E,0x04,0xDD,0xDB
Note: 0x8E,0x04 are converted to binary numbers of 1000,1110,0000,0100, that is, the switches of paths 18, 19,
20, 24 and 27 are in the connected status, and the rest are in the disconnected status.
Example 5: Set the current time.
Send: 0x01,0x10,0x10,0x2C,0x00,0x03,0x06,0x15,0x02,0x18,0x11,0x06,0x1E, 0xDD,0x1D
Return: 0x01,0x10,0x10,0x2C,0x00,0x03,0x45,0x01
Note: It indicates that the time is set to 17:06:30 on February 24, 2021 (note the BCD code format).
Example 6: Set the buffeting elimination time of the remote communication unit with instrument address 1.
Send: 0x01,0x10,0x51,0x00,0x00,0x01,0x02,0x00,0x04,0Xe7,0x56
Return: 0x01,0x10,0x51,0x00,0x00,0x01,0x11,0x35
Note: The buffeting elimination time is set to 4ms (buffeting elimination time: in the vibration environment, the
stroke switch or button often sends out the wrong signal due to buffeting, and the buffeting time is generally short.
According to the characteristics of short buffeting time, the reliable and effective signal after buffeting elimination
can be obtained by setting the buffeting time of the ARTU remote communication unit, so as to achieve the purpose
of the anti-interference).
5.6 detailed explanation of analog input and output signals
The analog input AI signal has five information：“Fact”AI actual data、“Statue”AI data、“Style”input type
（“0-20mA”、“4-20mA”、“0-5V”、“1-5V”）、“High”AI input high point and“Low”AI input low point.The
AI actual data and AI data meet the following formula：
AI data=(AI actual data-Style_Low*1000)*(High-Low)/(Style_High - Style_Low)+Low；
Note:take “style” input type “4-20mA”as an example，Style_Low is equal to 4 and Style_High is equal to 20
The analog output AO signal has four information：“Statue”AO data、“Style”output type（“0-20mA”、
“4-20mA”、“0-5V”、“1-5V”）、“High”AO output high point and“Low”AO output low point.The AO actual data
and AO data meet the following formula：
AO actual data =(Statue-Low)/(High-Low)*(Style_High - Style_Low)+Style_Low；
Note:take “style” output type “4-20mA”as an example，Style_Low is equal to 4 and Style_High is equal to 20

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6. Appendixes
6.1 Dial switch settings
6.1.1 Dial code definition
1
2
3
4
5
6
7
8
9
10
Address settings
1 0 0 0 0
Baud-rate
settings
0 0
Mode
settings
0
Communication mode settings
0 0
6.1.2 Address settings
Dial code 1
Dial code 2
Dial code 3
Dial code 4
Dial code 5
Address
1
0
0
0
0
1
0
1
0
0
0
2
- - - - - - -- - - - -- - - - - -- - - - - -- -
1
1
1
1
1
31
0
0
0
0
0
32
6.1.3 Baud-rate settings
Baud-rate
Dial code 6
Dial code 7
9600bps
0
0
4800bps
1
0
38400bps
0
1
19200bps
1
1
6.1.4 Mode settings
Dial code 8
Note: Reset dial code 8 and the
address or baud rate at the same
time so as to work in a new
communication mode.
Instrument local address and baud-rate settings
0
Upper computer address and baud-rate settings
1
6.1.5 Format settings
Mode
Dial code 9
Dial code 10
10 bits: 1 start bit, 8 data bits and 1 stop bit.
0
0
11 bits: 1 start bit, 8 data bits and 2 stop bits (reserved).
1
0
11 bits: 1 start bit, 8 data bits, even parity and 1 stop bit.
0
1
11 bits: 1 start bit, 8 data bits, odd parity and 1 stop bit.
1
1
Note: Dial switch status description: 1: OFF, 0: ON
6.2 Modbus function code description
6.2.1 Exception response format of the ARTU tetratele unit to an erroneous command received
Exception response format of the ARTU tetratele unit
Address
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)
Exception codes are defined as follows:
01 Illegal function code (the received function code is not supported);
02 Illegal data location (the specified data location is out of the scope of the instrument);

16
03 Illegal data value (data values received to host are out of range of the corresponding address);
04 Slave station device failure (data values received to host sent are not currently allowed to be written).
6.2.2 Status of the used Modbus 01H/02H function
Reading required by the upper computer (MODBUS 01H/02H function)
Address
Function
Address
Data
CRC check
BYTE
BYTE
WORD
WORD
WORD
XX
XX（01H/02H）
XXXX
XXXX
XXXX (CRC check value)
Lower machine reply (MODBUS 01/02 function)
Address
Function
Data length
Data
CRC check
BYTE
BYTE
BYTE
N BYTE
WORD
XX
XX（01H/02H）
XX
XXXX…….
XXXX (CRC check value)
Lower machine abnormal reply (MODBUS 81H/82H function)
Address
Corresponding
error function
Exception error code data
CRC check
BYTE
BYTE
BYTE
WORD
XX
XX（81H/82H）
XX (02H address error, 03H data error)
XXXX (CRC check value)
6.2.3 Read by using Modbus 03 or 04 function
Reading required by the upper computer (MODBUS 03H/04H function)
Address
Function
Start address
Data
CRC check
BYTE
BYTE
WORD
WORD
WORD
XX
XX（03H/04H）
XXXX
XXXX（N）
XXXX (CRC check value)
Lower machine reply (MODBUS 03H/04H function)
Address
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)
Lower machine abnormal reply (MODBUS 83H/84H function)
Address
Corresponding
error function
Exception error code data
CRC check
BYTE
BYTE
BYTE
WORD
XX
XX（83H/84H）
XX (02H address error, 03H data error)
XXXX (CRC check value)
6.2.4 Status of mandatory alarm by using Modbus 05H function
Reading required by the upper computer (MODBUS 05H function)
Address
Function
Address
Data
CRC check
BYTE
BYTE
WORD
WORD
WORD
XX
XX（05H）
XXXX
0ff00H or 0000H
XXXX (CRC check value)

17
Lower machine reply (MODBUS 05 function)
Address
Function
Address
Data
CRC check
BYTE
BYTE
WORD
WORD
WORD
XX
XX（05H）
XXXX (same as
requested by the
upper computer)
XXXX (same as
requested by the
upper computer)
XXXX (CRC check value)
Lower machine abnormal reply (MODBUS 85H function)
Address
Corresponding
error function
Exception error code data
CRC check
BYTE
BYTE
BYTE
WORD
XX
XX（85H）
XX (02H address error, 03H data error)
XXXX (CRC check value)
6.2.5 Write multiple data by using Modbus 10H function
Write multiple data as requested by the upper computer (MODBUS 16 (10H) function)
Address
Function
Start
address
Number
of data
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 machine reply (MODBUS 16 (10H) function)
Address
Function
Start address
Number of data
CRC check
BYTE
BYTE
WORD
WORD
WORD
XX
XX（10H）
XXXX
XXXX
XXXX (CRC check value)
Lower machine abnormal reply (MODBUS 90H function)
Address
Corresponding
error function
Exception error code data
CRC check
BYTE
BYTE
BYTE
WORD
XX
XX（90H）
XX (02H address error, 03H data error,
04 writing not allowed)
XXXX (CRC check
value)
7 Communication Connection Modes
When multiple ARTUs are used in networking, an terminal matching resistor R shall be connected in parallel on
A and B terminals of the last RS485 to ensure communication impedance matching, and the terminal matching
resistance is generally between 120Ω-10kΩ, and may vary with different wiring. The above figure is the schematic
diagram of using a three-core shielded line, the shielding lay is connected with ground, and the G1 terminals of each
device are connected in parallel.
8 Debugging and Maintenance
8.1 Operation instructions
1) Check whether the power line is properly connected before powering on.
2) After powering on, ensure that the power indicator light (POWER) is lit, and that the RUN light (RUN) begins