Lg Electronics 120S User Manual

8-39 

 

 

 
 

 

User Defined Protocol Communication allows users who do communication between MASTER-K120S main unit and other kind 

of device to define the other company’s protocol at MASTER-K PLC. There’re a number of kinds of protocols made by many 

companies, that it’s difficult to have all protocols in it. So if a user defines a protocol that can be applied to his/her purpose, 

MASTER-K120S main unit executes the communication with the other kind of device through the defined protocol.   

For this, protocol frame must be defined in KGLWIN (Version 2.0 or higher). And exact knowledge about the contents of the 

protocol defined by the user is vital in making the communication possible. KGLWIN can download a user defined protocol 

frame into MASTER-K120S main unit and it is saved. it is not erased by power’s off/on. For using user-defined mode, he/she 

should program with instruction controlling sending of PLC as well as edit frames. This section explains User Defined Protocol 

Communication setting & usage. 

8.2.2 Parameter Setting 

1) Setting Communications Parameter 

 

(1)  Open a new project file from KGLWIN and select K120S as PLC type 

 

(2)  After setting communication parameter at KGLWIN. Double click it to activate this window. 

 

 

 

(3)  Set according to the following table. 

 

Communication Method 

Protocol and mode

Communi

-cation 

Station 

no. 

Baud 

rate 

Data 

bit 

Parity 

bit 

Stop bit

Communication 

channel 

Timeout 

User 

defined

Enable 

0 

19200 

8 

None 

1 

RS232C null modem 

or RS422/485 

500ms 

Master