LG RS 485 User Manual

RS485 Option Board

for SV-iS5/iH Series

Read this manual carefully before using the RS485 OPTION BOARD
and follow the instructions exactly.
After reading this manual, keep it at handy for future reference.

LG Industrial Systems

User Manual

Morek IT OÜ, Rauna 24, 76506 Saue Harjumaa, Estonia. www.morek.eu Tel. [phone] Fax [phone] [e-mail]

Thank you for purchase of LG RS 485 Option Board!

SAFETY PRECAUTIONS

 Always follow safety precautions to prevent accidents and potential hazards from occurring.
 Safety precautions are classified into “WARNING” and “CAUTION” in this manual.

WARNING

CAUTION

 Throughout this manual we use the following two illustrations to make you aware of safety

considerations:

Identifies potential hazards.

Read the message and follow the instructions carefully.

Identifies shock hazards.
Particular attention should be directed because dangerous voltage may be present.

 Keep this manual at handy for quick reference.

CAUTION

 Do not touch the CMOS components unless the board is grounded.

ESD can cause break down of CMOS components.

 Do not change the communication cable with the inverter power is applied.

Otherwise, there is a danger of connecting error and damage to the board.

 Make sure to precisely insert the connector of inverter and option board

Otherwise, there is a danger of connecting error and damage to the board.

 Check the parameter unit when setting the parameters.

Otherwise, there is a danger of connecting error and damage to the board.

Indicates a potentially hazardous situation which, if not avoided,
can result in serious injury or death.

Indicates a potentially hazardous situation which, if not avoided,
can result in minor to moderate injury, or serious damage to the
product.

Morek IT OÜ, Rauna 24, 76506 Saue Harjumaa, Estonia. www.morek.eu Tel. [phone] Fax [phone] [e-mail]

1

1. INTRODUCTION

By using a RS 485 OPTION BOARD, SV-iS5/iH inverter can be connected to a RS 485 network.

1.1. When you use the RS 485 Option Card …

Inverter can be controlled and monitored by the sequence program of the PLC or other master module.
Up to 31 drives or other slave devices may be connected in a multi-drop fashio n on the RS­485 network and may be monitored or controlled by a single PLC or PC. Parameter setting and change
are available through PC.

1.1.1. Interface type of RS485 reference

- Allows the drive to communicate with any other co mputers.

- Allows connection of up to 31 drives with multi-drop link system.

- Noise-resistant interface
Users can use any kind of RS232-485 converters. The specifications of converters depend on the
manufacturers. Refer to the converter manual for detailed specifications.

1.1.2. Before Installation

Before installation and operation, this manual should be read thoroughly. If not, it can cause personal injury
or damage other equipment.

2. SPECIFICATION

2.1. Performance specification

Items Specifications

Communication method RS485 (Using RS232-485 Converter)
Transmission form Bus method, Multi-drop Link System
Applicable inverter IS5/iH series drive
Number of drives Maximum 31 drives connectable
Transmission distance Max. 1200m (Less than 700 m recommended)
Converter RS232-485, Use PC with RS232 card embedded

2.2. Hardware Specifications

Items Specifications

Installation Option connector on the inverter control board

Control B/D 5V dc supplied from inverter power supply

Power
Supply

Comm. B/D

Power supplied using 5V DC-DC converter on option
board

Morek IT OÜ, Rauna 24, 76506 Saue Harjumaa, Estonia. www.morek.eu Tel. [phone] Fax [phone] [e-mail]

2

2.3. Communication Specification

Items Specifications

Communication speed 1200 /2400/4800/9600/19200 bps Selectable
Control procedure Asynchronous communication system
Communication system Half duplex system
Character system BINARY (8 bit)
Stop bit 1 bit
Error check (CRC16)

2 byte

Parity check None

3. PRODUCT DETAIL

3.1. Layout and detail

Name Description

Connector Connector to inverter main PCB

P 485 signal - high
N 485 signal – low
G 485 Ground
S Shield

Signal

connection

terminal

Communication

signal connection

terminal

T1, T2 Connect a terminating resistor

Figure 1-1. Installating RS485 Option Card to SV-iS5

Morek IT OÜ, Rauna 24, 76506 Saue Harjumaa, Estonia. www.morek.eu Tel. [phone] Fax [phone] [e-mail]

3

Figure 1-2. Installating RS485 Option Card to SV-iH

3.2. Status LED

CPU LED

Normal operation of the board

RXD LED

Receiving 485 signal

TXD LED

Responding to 485 signal

Intermittent blinking Wrong data received (normal)
Blingking with CPU LED
coincidentally

DPRAM Communication Error

ERR LED

Blinking after CPU LED blinks

Network Connection TimeOut

Connect CN1to CNC7

iH Control Board

RS485 Board

CPU

TX RX ERR

CN1

U1

U4

U3

X1

S

G T2 T1 N P

CNC3

G5 BC5

U6U7

U8

R

CNC7

U4

BC4

B7

iH

Morek IT OÜ, Rauna 24, 76506 Saue Harjumaa, Estonia. www.morek.eu Tel. [phone] Fax [phone] [e-mail]

4

4. INSTALLATION

4.1. Option board installation guide

1. Remove the keypad on the inverter and connect the RS485 option board (See the Figure 1).

2. Double check the board is firmly installed to the board and then apply the inverter power.

3. When power ON, CPU LED is blinking per second after all LEDs blink one after another .

4. If “CPU LED” is not blinking, turn off the inverter power swiftly (if not, inverter and the board may get
damaged.) and check for the proper installation of the board. If the problem persists, contact LG
distributor.

5. Check I/O 47 is set to “RS485”.

6. When the above condition is met, set the communication parameters as shown below.

[For SV-iS5]

Parameter code Display Setting Value

< COM-01 > Opt B/D RS485 displayed automatically
< COM-02 > Opt mode Setting command to be controlled by option

< I/O- 46 > Inv. number

1~31
(Verify the assigned number is not duplicated.)

< I/O- 47 > Baud-rate

9600 bps (Factory default)

< I/O- 48 > Lost command (Note 1) User defined
< I/O- 49> Time.Out (Note 1) 0.1 sec (Factory default)

Note1) set for emergency stop of the inverter when inverter and master communication becomes
faulty. Activates when communcation has not been made during setting time. This means remote
controlling of inverter has not executed. Set these for safe use of the inverter.

[For SV-iH]

Parameter code Display Setting Value

< FUN-01 > Freq. set “Remote”
< FUN-02 > Run/stop set “Remote“

< I/O- 50 > Inv. number

1~31

(Verify the assigned number is not duplicated.)

< I/O- 51 > Baud-rate 9600 bps (Factory default)
< I/O- 52 > Comm.timeout(Note1) 10.0 (Factory default)

Note1) set for emergency stop of the inverter when inverter and master communication becomes
faulty. Activates when communcation has not been made during setting time. This means remote
controlling of inverter has not executed. Set these for safe use of the inverter.

If Comm. Timeout is set to “0”, inverter maintains its status without stopping at the event of

network communication disconnection.

7. Turn off the inverter power to connect the converter when step 6 is finished.

8. Connect the terminating resistor at the end of network (See the figure 3).

Morek IT OÜ, Rauna 24, 76506 Saue Harjumaa, Estonia. www.morek.eu Tel. [phone] Fax [phone] [e-mail]

5

4.2. RS232-485 converter installation

See the converter manual for accurate installation.

4.3. Computer, Converter and RS485 Option Card Configuration

4.3.1. System configuration

 Maximum cable length is 1200m but recommended length is within 700.
 The number of connectable inverter is 31.

Figure 2. System configuration

4.3.2. Communication signal connection

Figure 3. Option card terminal layout

Pin S GND T1 T2 N P

Description Shield Ground Termination Signal
* S: Networkd line ground shoud be done only one point.
Connect it to screw near terminal shield when grounding through inverter.
* GND: Ground terminal for 485 communication
* T1, T2: Shorting these terminals connects a terminating resistor.

Computer

232/485
Converter

Option card

Option card

Option card

Inverter 1 Inverter 2 Inverter n

…

S GND

T1

T2 N P

Morek IT OÜ, Rauna 24, 76506 Saue Harjumaa, Estonia. www.morek.eu Tel. [phone] Fax [phone] [e-mail]

6

5. COMMUNICATION PROTOCOL



Use LG RS485 protocol (Open protocol). Contact LG representatives.



Computer or other hosts can be Master and inverters Slave. Inverter responds to Read/Write

command from Master.

5.1. Supported command codes

Function Code Name

‘R’ Parameter Read

‘W’ Parameter Write

‘X’ Monitor Register
‘Y’ Monitor Execution

(Important: Use ASCII CODE (Capital Letter).)

5.2. BroadCast Function



Use it to send command to all inverters at the network.



All inverters respond when command is sent from Station # 255.

󰼿

5.3. Error Code

Error Code Display Description

ILLEGAL

FUNCTION

IF Invalid command received.

ILLEGAL DATA

ADDRESS

IA

Invalid parameter address received.
Monitor executed without resistoring monitor.

ILLEGAL DATA

VALUE

ID Invalid data received.

WRITE MODE

ERROR

WM Read Only or not-programmable during run.

FRAME ERROR FE Frame size, internal Num or Sum is different.

TIME OUT

ERROR

TO DPRAM communication failed for the set time.

DPRAM OFF LINE DO DPRAM is Off-line.

INVALID ID

NUMBER

IN Different address received.

UNDEFINED

CONDITION

UC Undefined condition received.

Morek IT OÜ, Rauna 24, 76506 Saue Harjumaa, Estonia. www.morek.eu Tel. [phone] Fax [phone] [e-mail]