Delta Electronics RTU-485 Prospecto

5011668000-RU00

2007-08-13

Warning

Please read this instruction sheet carefully before use.

Switch off the power before wiring.

RTU-485 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 damages on the
device may occur.

DO NOT touch the internal circult in one minute after the power is switched off.

DO NOT connect input AC power supply to any of the I/O terminals; otherwise serious damage may occur.

Check all the wiring again before switching on the power and DO NOT touch any terminal when the power is
switched on. Make sure the ground terminal

is correctly grounded in order to prevent electromagnetic

interference.

Introduction

Thank you for choosing Delta RTU-485 communication module. RTU-485 is a Modbus remote I/O
communication module for Delta's PLC to remote-control Slim series DI/DO and AI/AO extension units.
As a standard Modbus slave, RTU-485 is compatible with other master station complying with Modbus
protocol.

Product Profile & Outline

ST O P

R UN

-4

R UN

A LA RM

PO W ER

R S- 4 85

Unit: mm

1. POWER indicator

9. Mounting hole for extension unit

2. RUN indicator

10. Nameplate

3. ALARM indicator

11. Extension port for extension unit

4. RUN/STOP switch

12. DIN rail slot (35mm)

5. Communication indicator

13. Fastening hole for extension unit

6. Address setup DIP switch

14. DIN rail clip

7. Communication mode setup DIP switch

15. Mounting rail for extension unit

8. RS-485 communication port

16. Power input

ENGLISH

Specifications

RTU-485 Connector

Type

Removable 3-pin connector

Transmission
method

RS-485

Transmission cable

2 twisted isolation cables

Electrical isolation

500V DC

Communication

Valid communication
address

1 ~ F0 (decimal: 1 ~ 240)

Series transmission
speed

1,200/2,400/4,800/9,600/19,200/38,400/57,600/115,200 bps (bits per second)

Communication
mode

7,E,1-ASCII / 7,O,1-ASCII / 7,E,2-ASCII / 7,O,2-ASCII / 7,N,2-ASCII / 8,E,1-ASCII /
8,O,1-ASCII / 8,N,1-ASCII / 8,N,2-ASCII / 8,E,1-RTU / 8,O,1-RTU / 8,N,1-RTU/
8,N,2-RTU

Electrical Specification

Power voltage

24V DC (-15% ~ 20%) (with DC input polarity reverse protection)

Environment

Noise immunity

ESD (IEC 61131-2, IEC 61000-4-2): 8KV Air Discharge, 4KV Contact Discharge
EFT (IEC 61131-2, IEC 61000-4-4): Power Li4ne: 2KV, Digital I/O: 1KV
Analog & Communication I/O: 1KV
Damped-Oscillatory Wave: Power Line: 1KV, Digital I/O: 1KV
RS (IEC 61131-2, IEC 61000-4-3): 80MHz ~ 1000MHz , 1.4GHz ~ 2.0GHz , 10V/m

Operation/storage

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)

Standards

IEC 61131-2, UL508

Components

RUN/STOP Switch

Status

Explanation

1. RUN indicator on RTU-485 is On.

2. AI/AO extension unit in RUN status.

1. AI/AO extension unit switches from RUN to STOP status.

RUN  STOP

2. Y points on DI/DO extension unit are all Off.

1. RUN indicator on RTU-485 is Off.

2. AI/AO extension unit in STOP status.

3. Communication control is not allowed in AI/AO extension unit.

STOP

4. Communication control is not allowed in DI/DO extension unit.

1. RTU-485 re-detects the number of points in DI/DO unit and the

number of AI/AO units.

ST OP

RUN

STOP  RUN

2. AI/AO extension unit switches from STOP to RUN status.

Address Setup DIP Switch

DIP Switch Setting

Explanation

H’01 ~ H’F0

For valid RTU-485 address, the definition of ID0 ~ ID7
are: 2

, 2

, … 2

, 2

H’00, H’F1 ~ H’FF

In the Modbus protocol, H’00 is defined as broadcast
mode. H’F1 ~ H’FF are incorrect RTU-485 addresses.

Communication Mode Setup DIP Switch

The communication setup switch is a set of 8-bit DIP switches. PA0 ~ PA3 are for setting up RTU-485
communication mode, DR0 ~ DR2 are for setting up the series transmission speed, and A/R is for setting
up ASCII/RTU mode. There are 13 communication modes and 8 series transmission speeds available.

PA3

PA2

PA1

PA0

A/R

Communication mode

OFF

7,E,1-ASCII

OFF

7,O,1-ASCII

OFF

7,E,2-ASCII

OFF

7,O,2-ASCII

OFF

7,N,2-ASCII

OFF

8,E,1-ASCII

OFF

8,O,1-ASCII

OFF

8,N,1-ASCII

OFF

8,N,2-ASCII

OFF

8,E,1-RTU

OFF

8,O,1-RTU

OFF

8,N,1-RTU

OFF

8,N,2-RTU

Other settings of PA3, PA2, PA1, PA0 and A/R will be regarded as invalid
communication modes

DR2

DR1

DR0

Series Transmission speed

OFF

1,200 bit/s

OFF

2,400 bit/s

OFF

4,800 bit/s

OFF

9,600 bit/s

OFF

19,200 bit/s

OFF

38,400 bit/s

OFF

57,600 bit/s

115,200 bit/s

Function Codes Supported by RTU-485

RTU-485 complies with the standard Modbus protocol, supporting the 7 function codes, H’01, H’02, H’03,
H’05, H’06, H’0F, and H’10. Please refer to the standard Modbus protocol for the specific data format of
each function code.

Function code

Function

Data type

Applicable address

H’01

Read the output status of bit
device

bit

DO area: H’0500 ~ H’057F

H’02

Read the input status of bit
device.

bit

DI area: H’0400 ~ H’047F

Special function area: H’0000 ~ H’001F

CR of the 1

AI/AO unit: H’1600 ~ H’1630

CR of the 2

AI/AO unit: H’1640 ~ H’1670

CR of the 3

AI/AO unit: H’1680 ~ H’16B0

CR of the 4

AI/AO unit: H’16C0 ~ H’16F0

CR of the 5

AI/AO unit: H’1700 ~ H’1730

CR of the 6

AI/AO unit: H’1740 ~ H’1770

CR of the 7

AI/AO unit: H’1780 ~ H’17B0

H’03

Read register

word

CR of the 8

AI/AO unit: H’17C0 ~ H’17F0

H’05

Write single datum into bit
device

bit

DO area: H’0500 ~ H’057F

RUN/STOP RTU module: H’0003

H’06

Write single datum into register

word

Applicable to CR with write attribute in the 1

~ 8

AI/AO extension unit.

H’0F

Write many data into bit device

bit

DO area: H’0500 ~ H’057F

RUN/STOP RTU module: H’0003

H’10

Write many data into register

word

Applicable to CR with write attribute in the 1

~ 8

AI/AO extension unit.

Example: Use function code 03 to read CR0 and CR1 in the 1

AI/AO extension unit: (ASCII mode)

The request message sent from master PLC to RTU-485 is “: 01 03 16 00 00 02 E4 CR LF”
The responding message sent from RTU-485 to the master PLC is “: 01 03 04 00 88 00 00 70 CR LF”

Note:

1. RTU-485 can only read and write one AI/AO extension unit at the same time.
2. RTU-485 is able to read/write maximum 16 words at a time in the communication control.

LED Indicators

POWER Indicator

LED status

Indication

How to deal with it

Off

No power

Check if the power and connection of
RTU-485 work normally. If both work
normally, your RTU-485 malfunctions.
Please change to a new RTU-485.

Constantly On in green

RTU-485 module is powered

RUN Indicator

LED status

Indication

How to deal with it

Off

RTU-485 and the connected AI/AO
extension unit are in STOP status.

Constantly On in green

RTU-485 and the connected AI/AO
extension unit are in RUN status.

ALARM Indicator

LED status

Indication

How to deal with it

Red light flashes

Low power voltage

Adjust the voltage supplied to RTU-485 to
normal voltage.

Incorrect communication format

Reset to the communication format
supported by RTU-485 and re-power the
module after the setup.

Incorrect station No.

Check if the station No. is within H’01 ~
H’F0.

Constantly On in red

1. No extension unit connected

2. More than 8 extension unit

connected

3. More then 128 I/O points in the

extension unit.

1. Make sure the extension unit is correctly

connected.

2. Make sure the number of connected

extension units is less than 8.

3. Make sure the number of I/O points is

less than128.

RS-485 Indicator

LED status

Indication

How to deal with it

Red light flashes during
communication

The LED will flash once when RTU-485
and the master completes the
communication of 1 message.

注意事項

請在使用之前，詳細閱讀本使用說明書。

實施配線，務必關閉電源。

本機為開放型（OPEN TYPE）機殼，因此使用者使用本機時，必須安裝於具防塵、防潮及免於電擊

／衝擊意外的外殼配線箱內。另必須具備保護措施（如：特殊的工具或鑰匙才可打開），防止非維護

人員操作或意外衝擊本體，造成危險及損壞。

輸入電源切斷後，一分鐘之內，請勿觸摸內部電路。

交流輸入電源不可連接於輸入／輸出信號端，否則可能造成嚴重損壞。請在上電前再次確認電源配線，

且請勿在上電時觸摸任何端子。本體上的接地端子務必正確的接地，以提高產品抗雜訊能力。

產品簡介

感謝您使用台達 RTU-485 通訊模組，RTU-485 為 Modbus 遠端 I/O 通訊模組，可實現台達可程式控制器對
Slim

系列 DI/DO，AI/AO 擴充模組的遠端控制。此外，RTU-485 做為標準的 Modbus 從站設備，也可以相

容其他遵循 Modbus 協定的主控設備。

產品外觀及各部介紹

ST O P

R UN

-4

R UN

A LA RM

PO W ER

R S- 4 85

尺寸單位：mm

1. POWER

指示燈

擴充機定位孔

2. RUN

指示燈

10.

銘牌說明

3. ALARM

指示燈

11.

擴充機連介面

4. RUN/STOP

開關

12. DIN

軌槽 (35mm)

5. Communication

指示燈

13.

擴充機固定扣

站號設置開關

14. DIN

固定扣

通訊模式設置開關

15.

擴充機固定槽

8. RS-485

通訊口

16.

電源輸入口

繁體中文

功能規格

RTU-485

連接器

接頭

可插拔式 3Pin 連接器

傳輸方式

RS-485

傳輸電纜

絞線式隔離線

電氣隔離

500V DC

通訊

有效通訊位址 1 ~ F0（十進位為 1 ~ 240）
串列傳輸速率支援 1,200、2,400、4,800、9,600、19,200、38,400、57,600、115,200 bps（位元/秒）

通訊模式

支援 7,E,1-ASCII、7,O,1-ASCII、7,E,2-ASCII、7,O,2-ASCII、7,N,2-ASCII、8,E,1-ASCII、8,O,1-ASCII、

8,N,1-ASCII

、8,N,2-ASCII、8,E,1-RTU、8,O,1-RTU、8,N,1-RTU、8,N,2-RTU

電氣規格

電源電壓

24V DC (-15% ~ 20%)

（具直流輸入電源極性反接保護）

環境規格

雜訊免疫力

ESD (IEC 61131-2, IEC 61000-4-2): 8KV Air Discharge

，4KV Contact Discharge

EFT (IEC 61131-2, IEC 61000-4-4): Power Line: 2KV, Digital I/O: 1KV
Analog & Communication I/O: 1KV
Damped-Oscillatory Wave: Power Line: 1KV, Digital I/O: 1KV
RS (IEC 61131-2, IEC 61000-4-3): 80MHz~1000MHz , 1.4GHz~2.0GHz , 10V/m

操作/儲存環境

操作：0ºC ~ 55ºC（溫度）、50 ~ 95%（濕度）、污染等級 2
儲存：-25ºC ~ 70ºC（溫度）、5 ~ 95%（濕度）

耐震動/衝擊

國際標準規範 IEC61131-2、IEC 68-2-6 (TEST Fc)/IEC61131-2 & IEC 68-2-27 (TEST Ea)

標準

IEC 61131-2

、UL508 標準

各部元件介紹

RUN/STOP

開關

狀態

說明

1. RTU-485

模組的RUN燈亮

RUN

2. AI/AO

擴充模組處於RUN狀態

1. AI/AO

擴充模組由RUN切換到STOP狀態

RUN  STOP

2. DI/DO

的Y點全部變為OFF狀態

1. RTU-485

模組的RUN燈熄滅

2. AI/AO

擴充模組處於STOP狀態

3. AI/AO

擴充模組不可通訊控制

STOP

4. DI/DO

擴充機不可通訊控制

1. RTU-485

模組重新偵測擴充機DI/DO點數和AI/AO台數

S TOP

R U N

STOP  RUN

2. AI/AO

擴充模組由STOP切換到RUN狀態