Delta Electronics RTU-EN01 User manual

RTU-EN01
Modbus TCP Remote I/O Communication Module
Operation Manual
DVP-0213920-01

Modbus TCP Remote I/O Communication Module RTU-EN01
DVP-PLC Operation Manual 1
Introduction
3This operation manual only provides introductory information on electrical specification, installation and wiring.
3RTU-EN01 is an OPEN-TYPE device and therefore should be installed in an enclosure free of airborne dust, humidity,
electric shock and vibration. The enclosure should prevent non-maintenance staff from operating the device (e.g. key
or specific tools are required to open the enclosure) in case danger and damage on the device may occur. DO NOT
touch any terminal when the power is switched on.
3Please read this manual carefully and follow the instructions to avoid damage on the product or harm on staff.
Table of Content
1INTRODUCTION....................................................................................................................3
1.1 Features ......................................................................................................................................3
1.2 Specifications ..............................................................................................................................3
2PRODUCT PROFILE & OUTLINE.........................................................................................4
2.1 Dimension ...................................................................................................................................4
2.2 Product Profile.............................................................................................................................5
2.3 LED Indicators.............................................................................................................................5
2.4 RUN/STOP Switch ......................................................................................................................6
2.5 RJ-45 PIN Definition....................................................................................................................6
2.6 RS-232 PIN Definition .................................................................................................................6
2.7 RS-485 PIN Definition .................................................................................................................6
3INSTALLATION & WIRING....................................................................................................6
3.1 Connecting RTU-EN01 to DVP Slim Series Digital Input/Output Module....................................6
3.2 Installing RTU-EN01 and DVP Slim Series Digital Input/Output Module onto DIN Rail ..............7
3.3 How to Connect RTU-EN01 to Network ......................................................................................7
4WORD DEVICES & BIT DEVICES IN RTU-EN01 .................................................................8
4.1 Basic Registers (BR)...................................................................................................................8
4.2 Explanations on BR.....................................................................................................................9
4.3 External Input Contacts (RX).....................................................................................................12
4.4 External Output Contacts (RY)..................................................................................................12
4.5 Control Register for Extension Modules (RCR).........................................................................12
4.6 Word Devices & Bit Devices for Timers (T)...............................................................................13
4.7 Word Devices & Bit Devices for Counters (C)...........................................................................14
4.8 Bit Devices for Real-Time Clock (R)..........................................................................................14
5MODBUS COMMUNICATION .............................................................................................15
5.1 Function Codes Supported .......................................................................................................15
5.2 Exception Codes Supported .....................................................................................................15
5.3 Device Type & Device Address .................................................................................................16

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6SETTING UP SOFTWARE................................................................................................... 16
6.1 Setting up Communications & Searching for Communication Modules in DCISoft .................. 16
6.2 Recording IP Address............................................................................................................... 18
6.3 Basic Settings........................................................................................................................... 19
6.4 Network Settings ...................................................................................................................... 21
6.5 Setting up Time Server ............................................................................................................. 22
6.6 IP Filter ..................................................................................................................................... 23
6.7 Smart PLC Setting: IF-THEN.................................................................................................... 24
6.8 Smart PLC Setting: Timer......................................................................................................... 25
6.9 Smart PLC Setting – Counter ................................................................................................... 25
6.10 Smart PLC Setting – RTC.........................................................................................................26
6.11 Analog Input/Output Modules ................................................................................................... 27
6.12 I/O Monitoring Table.................................................................................................................. 29
6.13 Setting up Gateway .................................................................................................................. 30
6.14 Virtual COM ............................................................................................................................. 33
6.15 Security Setting ........................................................................................................................ 35
6.16 Returning to Default Settings.................................................................................................... 36
6.17 Web Function............................................................................................................................ 36
7APPLICATION EXAMPLES – DCISOFT............................................................................. 42
7.15 Smart PLC: IF-THEN................................................................................................................ 42
7.16 Smart PLC: Timer ..................................................................................................................... 43
7.17 Smart PLC: Counter ................................................................................................................. 44
7.18 Smart PLC: RTC....................................................................................................................... 45
7.19 Virtual COM .............................................................................................................................. 46
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Modbus TCP Remote I/O Communication Module RTU-EN01
DVP-PLC Operation Manual 3
1 Introduction
To ensure correct installation and operation of RTU-EN01, please read this manual carefully before using your
RTU-EN01. RTU-EN01is an Ethernet remote I/O module for remote setting through Delta’s DCISoft. RTU-EN01
supports maximum 256 digital input/output points. RTU-EN01 supports Modbus TCP protocol and can be used
for remote monitoring with graphic control software or human machine interface. RTU-EN01 can also be used as
a Modbus TCP gateway, supporting the conversion from Modbus TCP commands to Modbus ASCII/RTU. In
addition, in MDI/MDI-X auto-detect, jump wire is not needed when you choose the network cable.
1.1 Features
zSupporting smart PLC functions, counter, timer and real-time clock. Able to operate independently without
control of PLC main processing unit or programming.
zAble to auto-detect 10/100 Mbps transmission speed; MDI/MDI-X auto-detect.
zSupporting maximum 16 digital input/output modules (Max. 256 I/O points) and 8 analog input/output
modules.
zSupporting maximum 16 sets of Modbus TCP connections.
zSupporting Modbus TCP/Modbus gateway (supporting Master mode, connectable to maximum 32 devices).
zParameters can be set up on webpage.
1.2 Specifications
Ethernet interface
Interface RJ-45 with Auto MDI/MDIX
Transmission method 802.3, 802.3u
Transmission cable Category 5e, 100m (Max)
Transmission speed 10/100 Mbps Auto-Detection
Communication protocol ICMP, IP, TCP, UDP, DHCP, NTP, Modbus TCP, HTTP
Serial communication interface (COM1)
Interface Mini Dim
Transmission method RS-232
Communication speed 19,200 bps
Communication format Stop bit: 1; Parity bit: None; Data bit: 8
Communication protocol Delta Configuration
Transmission cable DVPACAB215 / DVPACAB230 / DVPACAB2A30
Serial communication interface (COM2)
Interface 3 PIN feed-through terminal
Transmission method RS-485
Transmission distance 1,200m
Communication speed 110, 150, 300, 600, 1,200, 2,400, 4,800, 9,600, 19,200, 38,400, 57,600, 115,200
bps
Communication format Stop bit: 1, 2; Parity bit: None, Odd, Even; Data bit: 7, 8
Communication protocol Modbus ASCII、Modbus RTU

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Environment
Noise immunity
ESD (IEC 61131-2, IEC 61000-4-2): 8KV Air Discharge
EFT (IEC 61131-2, IEC 61000-4-4): Power Line:±2KV, Digital Input: ±2KV,
Communication I/O: ±2KV
RS (IEC 61131-2, IEC 61000-4-3): 80MHz ~ 100MHz, 10V/m. 1.4GHz ~ 2.0GHz,
10V/m
Conducted Susceptibility Test (EN61000-4-6, IEC61131-2 9.10): 150kHz ~ 80MHz,
3V/m
Surge Test (Biwave IEC61132-2, IEC61000-4-5): Power line 0.5KV DM, Ethernet
0.5KV CM, RS-485 0.5KV CM
Operation 0ºC ~ 55ºC (temperature), 50 ~ 95% (humidity), pollution degree 2
Storage -25ºC ~ 70ºC (temperature), 5 ~ 95% (humidity)
Shock/vibration
immunity
International standards: IEC61131-2, IEC 68-2-6 (TEST Fc)/IEC61131-2 & IEC
68-2-27 (TEST Ea)
Certificates
Electrical specification
Power supply voltage 24VDC (-15% ~ 20%) (with DC input polarity reverse protection)
Power fuse capacity 1.85A/30VDC, Polyswitch
Power consumption 2W
Insulation voltage 500VDC
Weight 116g
2 Product Profile & Outline
2.1 Dimension
STOP
RS-485 RS-232
RTU-EN01
RUN
BAT.LOW
POWER
RUN
LAN
60
37.4
Unit: mm

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2.2 Product Profile
1. POWER indicator 12. RS-485 communication port
2. RUN indicator 13. Extension module positioning hole
3. BAT.LOW indicator 14. Nameplate
4. RUN/STOP switch 15. Extension port
5. RS-232 indicator 16. DIN rail (35mm)
6. RS-485 indicator 17. Extension module fixing clip
7. LINK/ACK indicator 18. DIN rail clip
8. SPEED indicator 19. Power supply port
9. Digital display 20. 3P terminal block (standard accessory)
10. Ethernet communication port
11. RS-232 communication port
21. Power supply connection cable (standard
accessory)
2.3 LED Indicators
LED Color Function
POWER Green Power supply indication
RUN Green RUN/STOP indication
BAT.LOW Red Battery in low power indication
RS-232 Yellow Displaying communication status of RS-232 port
RS-485 Yellow Displaying communication status of RS-485 port
LINK/ACT Green Displaying the status of network
SPEED Yellow Displaying the speed of network connection

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2.4 RUN/STOP Switch
Status Explanation
1. RUN indicator on RTU-EN01 is ON.
2. Analog input/output module is in RUN status.
RUN
3. Smart PLC function is running.
1. Analog input/output module switches from RUN to STOP status.
RUN ÆSTOP 2. Y points on digital input/output module are all OFF.
1. RUN indicator on RTU-EN01 is OFF.
2. Analog input/output module is in STOP status.
STOP
3. Smart PLC function stops.
1. RTU-EN01 re-detects the information on the right-side module.
STOP
RUN
STOP ÆRUN
2. Analog input/output module switches from STOP to RUN status.
2.5 RJ-45 PIN Definition
PIN Signal Definition PIN Signal Definition
1 Tx+ Positive pole for data
transmission 5 -- N/C
2 Tx- Negative pole for data
transmission 6 Rx-
Negative pole for data
receiving
3 Rx+ Positive pole for data
receiving 7 -- N/C
4 -- N/C 8 -- N/C
2.6 RS-232 PIN Definition
PIN Signal Definition PIN Signal Definition
1 -- N/C 5 Tx Transmission data
2 -- N/C 6 -- N/C
3 -- N/C 7 -- N/C
4 Rx Reception data 8 GND Ground
2.7 RS-485 PIN Definition
PIN Signal Definition
1 SG Ground of data
2 D- Negative pole for data
3 D+ Positive pole for data
1
2
3
3 Installation & Wiring
In this section, we will introduce how to connect RTU-EN01 to other devices and the network.
3.1 Connecting RTU-EN01 to DVP Slim Series Digital Input/Output Module
zOpen the fixing clips on the right top and bottom sides on RTU-EN01. Meet the extension port on RTU-EN01
and the digital input/output module.
zPress and fix the clips on the digital input/output module. Make sure the contact between the modules is fine.

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DVP-16SP
DVP-02DA
DVP-16SP
DVP-02DA
POWER
RUN
BAT.LOW
RUN
STOP
RTU-EN01
LA N
RS-232
RS-485
3.2 Installing RTU-EN01 and DVP Slim Series Digital Input/Output Module onto DIN Rail
zUse standard 35mm DIN rail.
zOpen the DIN rail clips on RTU-EN01 and the digital input/output module and insert the modules onto the rail.
zPress the clips to fix the modules onto the rail.
DVP-16SP
DVP-02DA
35mm DIN rail
3.3 How to Connect RTU-EN01 to Network
Connect RTU-EN01 to the Ethernet hub by CAT-5e twisted pair. Since RTU-EN01 has Auto MDI/MDIX function,
CAT-5e twisted pair does not need to jump wire. See below for the connection between the PC and RTU-EN01
modules:

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DVP28SV
RUN
STOP
DVP-02DA
DVP-08ST
DVP-16SP
DVP-04AD
DVP-04TC DVP-04PT
Ethernet
RTU-EN01 DI/D
O
AI/A
O
DVP28SV
COM2
PC
DVPEN01-SL
4 Word Devices & Bit Devices in RTU-EN01
4.1 Basic Registers (BR)
BR# Attribute Content Explanation Default Latched
0 R Model name Set up by the system; read only. The model code of
RTU-EN01= H’0600. H’0600 YES
1 R Firmware version
Displaying the current firmware verision in hex, e.g. V1.2 is
indicated as high byte = 0x01 and low byte = 0x20. YES
2 R
Release date of the
version
Displaying the data in decimal form. 10,000s digit and 1,000s
digit are for “month”; 100s digit and 10s digit are for “day”. For
1s digit: 0 = morning; 1 = afternoon.
Example: 12191 indicates the version released in the afternoon
of December 19.
YES
3 R/W
Start/Stop PLC
function NO
4 Reserved . NO
5 R/W
COM2
communication
settings
RS-485 communication settings. Please refer to the table of
baud rate setting and communication format setting. H’0368 YES
6 R/W Address For setting up the station address K’1 YES
7 R Number of DI points Range: 0 ~ 256 NO
8 R Number of DO points Range: 0 ~ 256 NO
9 R Error code Displaying the errors. Please refer to the table of error codes. NO
10 Reserved NO
11 R/W
Communication
time-out
For setting up the communication time-out (ms) in Modbus
TCP mode. K’5000 YES
12 R/W
Communication delay
time
For setting up the minimum interval time between every
communication datum. K’0 YES
13 R/W
TCP connection idle
time For setting up idle time for TCP communication. Unit: second K’30 YES
14 ~ 22 Reserved NO
23 R
Number of analog I/O
modules Max. 8 NO

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BR# Attribute Content Explanation Default Latched
24 R
ID of the 1st analog
I/O module ID of the 1st analog I/O module NO
25 R
ID of the 2nd analog
I/O module ID of the 2nd analog I/O module NO
26 R
ID of the 3rd analog
I/O module ID of the 3rd analog I/O module NO
27 R
ID of the 4th analog
I/O module ID of the 4th analog I/O module NO
28 R
ID of the 5th analog
I/O module ID of the 5th analog I/O module NO
29 R
ID of the 6th analog
I/O module ID of the 6th analog I/O module NO
30 R
ID of the 7th analog
I/O module ID of the 7th analog I/O module NO
31 R
ID of the 8th analog
I/O module ID of the 8th analog I/O module NO
32 ~ 49 Reserved NO
50 R/W RTC settings Settings of the real-time clock NO
51 R/W Year Range: 1970 ~ 2099 YES
52 R/W Week Range: 1 ~ 7 YES
53 R/W Month Range: 1 ~ 12 YES
54 R/W Day Range: 1 ~ 31 YES
55 R/W Hour Range: 0 ~ 23 YES
56 R/W Minute Range: 0 ~ 59 YES
57 R/W Second Range: 0 ~ 59 YES
58 ~ 59 Reserved NO
60 Reserved NO
61 ~ 63 Reserved 0 NO
Symbol “R” refers to ready only; “R/W” refers to read and write.
4.2 Explanations on BR
BR#0: Model Name
Explanations:
1. Model code of RTU-EN01 = H’0600.
2. You can read the model code in the program to see if the extension module exists.
BR#1: Firmware Version
Explanations:
The firmware version of RTU-EN01 is displayed in hex, e.g. H’0100 indicates version V1.00
BR#2: Release Date of the Version
Explanations:
Displaying the data in decimal form. 10,000s digit and 1,000s digit are for “month”; 100s digit and 10s digit are for
“day”. For 1s digit: 0 = morning; 1 = afternoon.
Example: 12191 indicates the version released in the afternoon of December 19.

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BR#5: COM2 Communication Settings
Explanations:
b0 ~ b3
Interface Explanation
Data Baud rate
(bps) Data Baud rate (bps) Data Baud rate (bps)
0x1 110 0x6 2,400 0xB 57,600
0x2 150 0x7 4,800 0xC 115,200
0x3 300 0x8 9,600
0x4 600 0x9 19,200
Content COM2
RS-485
0x5 1,200 0xA 38,400
b4 ~ b7
b7 b6 ~ b5 b4
Explanation
Stop bit
0: 1 Stop bit
1: 2 Stop bits
Parity bit
00 : None parity bit
01 : Odd parity bit
11 : Even parity bit
Data bit
0 : 7 Data bits
1 : 8 Data bits
0000 (0) 7-N-1 0011 (3) 8-O-1 1000 (8) 7-N-2 1011 (B) 8-O-2
0001 (1) 8-N-1 0110 (6) 7-E-1 1001 (9) 8-N-2 1110 (E) 7-E-2
Content
0010 (2) 7-O-1 0111 (7) 8-E-1 1010 (A) 7-O-2 1111 (F) 8-E-2
b8 ~ b15
Content Explanation
0x02 Modbus RTU Master
0x03 Modbus ASCII Master
BR#6: Address
Explanations
For filling in or reading the Modbus address. The address will be displayed in the message display after being set
up. Range: 1 ~ 247.
BR#7: Number of DI Points
Explanations
Read the number of digital input points from BR#7. Range: 0 ~ 256. Max. I/O points: 256.
BR#8: Number of DO Points
Explanations
Read the number of digital output points from BR#8. Range: 0 ~ 256. Max. I/O points: 256.
BR#9: Error Code
Explanations:
Error code = 0 refers to no error occurring.
Code Indication How to correct

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Code Indication How to correct
F0 Returning to default setting --
F1 RTU-EN01 being powered --
F2 Power supply in low voltage Check if the power supply of the module works normally.
F3 Internal error. Manufacturing error.
1. Check if the settings of smart PLC are incorrect.
2. Re-power RTU-EN01. If the error still exists, try step 3.
3. Reset RTU-EN01. If the error still exists, send the module back to
the manufacturer for repair.
F5 Network connection error Check if RTU-EN01 is connected normally to the network.
F6 Insufficient TCP connection Check if the number of connected modules exceeds the maximum.
F7 RS-485 setting error Check if the RS-485 communication format is correct.
F8 IP setting error
1. DHCP request failure.
2. IP setting error.
3. MASK setting error.
4. Gateway does not exist in the same subnet.
5. Returning to default setting.
F9 Right-side module error
Check if the configuration of the right-side module has been modified. If
the error still exists, check if the number of I/O points exceeds the
maximum and whether the there are more than 8 analog I/O modules
connected.
04 Slave error
0b No response from station
1. Check if RTU-EN01 and RS-485 is connected normally.
2. Check if the series transmission speed is consistent with that of other
nodes on the network.
BR#11: Communication Time-out (ms)
Explanations:
For setting up the communication time-out. Default = 5,000ms. For example, if you wish to set up the
communication time-out to 7 seconds manually, write 7000 to BR#11. Range: 5 ~ 65,535.
BR#12: Communication Delay Time (ms)
Explanations:
For setting up the minimum interval time between every Modbus command. Default = 0ms. For example, if you
wish to set up the communication delay time to 100ms manually, write 100 into BR#12. Range: 0 ~ 65,535.
BR#13: TCP Connection Idle Time (s)
Explanations:
For setting up the TCP connection idle time. Default = 30 seconds. For example, if you wish to set up the idle time
to 7 seconds manually, write 7 into BR#13. Range: 5 ~ 65,535.
BR#23: Number of Analog I/O Modules
Explanations:
Read the number of right-side modules from BR#23. Max. 8.
BR#24 ~ #31: ID of the 1st ~ 8th Analog I/O Module
Explanations:
Read the ID of the 1st ~ 8th analog I/O modules from BR#24 ~ BR#31.

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BR#50 ~ BR#57: RTC Settings
Explanations:
For setting up the real-time clock (RTC). When BR#9 = 1, RTU-EN01 will stop to update the RTC values to
BR#10 ~ #16. Once the setup is completed, RTU-EN01 will set BR#9 to 0.
Allowed range for RTC: 1970/01/01 00:00:00 ~ 2037/12/31 23:59:59
BR#9
0 No action
1 RTC stops
2 RTC being set
4.3 External Input Contacts (RX)
RX# Attribute Content Explanation Default Latched
0 ~ 255 R/W External input contact Input points on analog I/O module OFF NO
Symbol “R” refers to ready only; “R/W” refers to read and write.
RX#0 ~ #255: External Input Contact
Explanations:
The right-side extension interface on RTU-EN01 is able to connect to DVP-Slim series digital I/O modules.
RTU-EN01 supports maximum 256 I/O points.
4.4 External Output Contacts (RY)
RY# Attribute Content Explanation Default Latched
0 ~ 255 R/W External output contact Output points on analog I/O module OFF NO
Symbol “R” refers to ready only; “R/W” refers to read and write.
RY#0 ~ #255: External Output Contact
Explanations:
The right-side extension interface on RTU-EN01 is able to connect to DVP-Slim series digital I/O modules.
RTU-EN01 supports maximum 256 I/O points.
4.5 Control Register for Extension Modules (RCR)
RCR# Attribute Content Explanation Default Latched
0 ~ 49 R/W The 1st analog I/O
module
Control register for the 1st analog I/O
module -- NO
50 ~ 99 R/W The 2nd analog I/O
module
Control register for the 2nd analog I/O
module -- NO
100 ~ 149 R/W The 3rd analog I/O
module
Control register for the 3rd analog I/O
module -- NO
150 ~ 199 R/W The 4th analog I/O
module
Control register for the 4th analog I/O
module -- NO

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RCR# Attribute Content Explanation Default Latched
200 ~ 249 R/W The 5th analog I/O
module
Control register for the 5th analog I/O
module -- NO
250 ~ 299 R/W The 6th analog I/O
module
Control register for the 6th analog I/O
module -- NO
300 ~ 349 R/W The 7th analog I/O
module
Control register for the 7th analog I/O
module -- NO
350 ~ 399 R/W The 8th analog I/O
module
Control register for the 8th analog I/O
module -- NO
Symbol “R” refers to ready only; “R/W” refers to read and write.
RCR#0 ~ #399: Control Register for Right-Side Analog I/O Modules
Explanations:
By reading/writing RCR in RTU-EN01, you are able to store or retrieve the data in the control register (CR) inside
the analog input/output module.
Example: RCR#0 corresponds to CR#0 in the 1st analog I/O module. RCR#260 corresponds to CR#10 in the 6th
analog I/O module. Extension module closest to RTU-EN01 is regarded the 1st module.
4.6 Word Devices & Bit Devices for Timers (T)
T# Attribute Register/coil name Explanation Default Latched
0 R/W Timer 0 Timer 0/OFF NO
1 R/W Timer 1 Timer 0/OFF NO
2 R/W Timer 2 Timer 0/OFF NO
3 R/W Timer 3 Timer 0/OFF NO
4 R/W Timer 4 Timer 0/OFF NO
5 R/W Timer 5 Timer 0/OFF NO
6 R/W Timer 6 Timer 0/OFF NO
7 R/W Timer 7 Timer 0/OFF NO
8 R/W Timer 8 Timer 0/OFF NO
9 R/W Timer 9 Timer 0/OFF NO
10 R/W Timer 10 Timer 0/OFF NO
11 R/W Timer 11 Timer 0/OFF NO
12 R/W Timer 12 Timer 0/OFF NO
13 R/W Timer 13 Timer 0/OFF NO
14 R/W Timer 14 Timer 0/OFF NO
15 R/W Timer 15 Timer 0/OFF NO
Symbol “R” refers to ready only; “R/W” refers to read and write.
T#0: Timer 0
Explanations:
When the timer is enabled, it will start to time according to the settings. When the timing reaches the target, the
bit device T0 will be ON. When the bit device is reset, the word device will be reset to 0 as well.

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T#1 ~ #15: Timer 1 ~ 15
Explanations:
Please refer to T#0.
4.7 Word Devices & Bit Devices for Counters (C)
C# Attribute Register/coil name Explanation Default Latched
0 R/W Counter 0 Counting up/down counter 0/OFF NO
1 R/W Counter 1 Counting up/down counter 0/OFF NO
2 R/W Counter 2 Counting up/down counter 0/OFF NO
3 R/W Counter 3 Counting up/down counter 0/OFF NO
4 R/W Counter 4 Counting up/down counter 0/OFF NO
5 R/W Counter 5 Counting up/down counter 0/OFF NO
6 R/W Counter 6 Counting up/down counter 0/OFF NO
7 R/W Counter 7 Counting up/down counter 0/OFF NO
8 R/W Counter 8 Counting up/down counter 0/OFF NO
9 R/W Counter 9 Counting up/down counter 0/OFF NO
10 R/W Counter 10 Counting up/down counter 0/OFF NO
11 R/W Counter 11 Counting up/down counter 0/OFF NO
12 R/W Counter 12 Counting up/down counter 0/OFF NO
13 R/W Counter 13 Counting up/down counter 0/OFF NO
14 R/W Counter 14 Counting up/down counter 0/OFF NO
15 R/W Counter 15 Counting up/down counter 0/OFF NO
Symbol “R” refers to ready only; “R/W” refers to read and write.
C#0: Counter 0
Explanations:
When the counter is enabled and RX turns from OFF to ON, counting up or counting down will be set
according to the settings. When the counting reaches the target, the counting will stop, and the bit device C0
will be set to ON. When the bit device is reset, the word device will be reset to 0 as well.
C#1 ~ #15: Counter 1 ~ 15
Explanations:
Please refer to C#0.
4.8 Bit Devices for Real-Time Clock (R)
R# Attribute Content Explanation Default Latched
0 R/W RTC 0 Real-time clock OFF NO
1 R/W RTC 1 Real-time clock OFF NO
2 R/W RTC 2 Real-time clock OFF NO
3 R/W RTC 3 Real-time clock OFF NO
4 R/W RTC 4 Real-time clock OFF NO
5 R/W RTC 5 Real-time clock OFF NO

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R# Attribute Content Explanation Default Latched
6 R/W RTC 6 Real-time clock OFF NO
7 R/W RTC 7 Real-time clock OFF NO
8 R/W RTC 8 Real-time clock OFF NO
9 R/W RTC 9 Real-time clock OFF NO
10 R/W RTC 10 Real-time clock OFF NO
11 R/W RTC 11 Real-time clock OFF NO
12 R/W RTC 12 Real-time clock OFF NO
13 R/W RTC 13 Real-time clock OFF NO
14 R/W RTC 14 Real-time clock OFF NO
15 R/W RTC 15 Real-time clock OFF NO
Symbol “R” refers to ready only; “R/W” refers to read and write.
R#0: RTC 0
Explanations:
When the RTC function is enabled, and the assigned trigger condition is true, RTU-EN01 will set the bit device R0
to ON and continue to output or stop according to the set time.
R#1 ~ #15: RTC 1 ~ 15
Explanations:
Please refer to R#0.
5 Modbus Communication
5.1 Function Codes Supported
Function code Explanation Devices supported
0x02 Read digital input point RX, RY, T, R, C
0x03 Read register BR, T, C, RCR
0x05 Write single bit device RY, T, R, C
0x06 Write single register BR, T, C, RCR
0x0F Write multiple bit devices RY, T, R, C
0x10 Write multiple registers BR, T, C, RCR
0x17 Read/write multiple registers BR, T, C, RCR
5.2 Exception Codes Supported
Exception code Explanation
0x01 Illegal function
0x02 Illegal data address
0x03 Illegal data value
0x04 Slave device failure
0x0b Gateway target device failed to respond.

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5.3 Device Type & Device Address
Discrete input
Device type Modbus address (Hex) 6-digit Modbus address (Dec) Number
RX 0x0400 ~ 0x04FF 101025 ~ 101280 256
Coil
RY 0x0500 ~ 0x05FF 001281 ~ 001537 256
T 0x1600 ~ 0x160F 005633 ~ 005649 16
R 0x1900 ~ 0x190F 006401 ~ 006416 16
C 0x1E00 ~ 0x1E0F 007681 ~ 007696 16
Holding register
Device type Modbus address (Hex) 6-digit Modbus address (Dec) Number
BR 0x0000~0x0040 400001~400064 64
T 0x1600~0x160F 405633~405649 16
C 0x1E00~0x1E0F 407681~407696 16
RCR 0x3000~0x3190 412289~412689 400
6 Setting up Software
This section gives instructions on how to set up RTU-EN01 by DCISoft and explanations on each setup page.
RTU-EN01 is set up by UDP port 20006; therefore, you have to be aware of the relevant settings of the firewall.
See the explanations below on the software.
6.1 Setting up Communications & Searching for Communication Modules in DCISoft
Broadcast search
1. Open DCISoft on the PC and click on the “IP Search” icon.

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2. You will see the communication module found.

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3. Double-click on the module to be set up to enter the setup page. The first page overviews the basic status of
the module and information on the right-side module.
4. The next page is for basic network setup. Consult your Internet Service Provider for relevant network setting.
For other settings, see BR#11 ~ BR#13.
6.2 Recording IP Address
The IP list allows the user to select modules directly and designate a module for search. Recording IP address
means to add this RTU-EN01 to the list, allowing the user to see RTU-EN01 in the search.
Recording IP address