LS K7M-DR14UE Economy PLC

Model Code Decoding

K7M-DR14UE

1. K7M: CPU main unit of MASTER-K120S series
2. ดี: DC24V digital input
3. ร: เอาท์พุทรีเลย์
4. 14: จุด I/O ทั้งหมด 14 (8จาก + 6ทำ)
5. คุณ: Wide-range power supply AC85~264V (AC powered)
6. อี: รุ่นประหยัด

Distinction: Standard model K7M-DR14U (without E). Hardware functions differ and cannot be directly replaced.

2. ข้อมูลจำเพาะทางไฟฟ้าหลัก

3. Key Distinction & หมายเหตุการเลือก
4. K7M-DR14UE (เศรษฐกิจ) VS K7M-DR14U (มาตรฐาน)

DR14UE: RS485 เท่านั้น; No high-speed counter, pulse output or PID, คุ้มค่า;

DR14U: RS232+RS485 onboard; supports high-speed counter, positioning and PID;

⚠️ Program logic is compatible, but hardware functions vary. Verify process requirements before replacement.

2. ประเภทเอาต์พุต: DR(รีเลย์) vs DT(ทรานซิสเตอร์)

DR Relay: Suitable for solenoid valves and contactors, high-frequency pulse output unavailable;

DT Transistor: Used for servo/stepper pulse control.

4. ซอฟต์แวร์การเขียนโปรแกรม

Software Name: KGL-WIN (Windows-only)

Communication for download: อาร์เอส485; LS dedicated programming cable required.

5. การใช้งานทั่วไป

Small standalone automation, conveyor equipment, packaging auxiliary machinery, simple assembly lines, การควบคุมระบบปรับอากาศ, logic control for low-voltage panel systems;

❌ Not suitable for: Servo positioning, high-frequency pulse output, closed-loop PID temperature control (hardware functions absent on economy model).

6. Reference Economy Models in the Same Series

K7M-DR10UE：6ดี/4ซี

K7M-DR14UE：8อังคาร/6ธ (Model covered herein)

K7M-DR20UE：12ดี/8ซี

K7M-DR30UE：18DI/12DO

7. การแก้ไขปัญหาทั่วไป & แนวทางการเดินสายไฟ
8. Do not overload relay output contacts. Use intermediate relays for frequently switched loads;
9. RS485 wiring: Do not reverse A/B lines; install terminating resistors at both ends of the bus;
10. Digital input accepts DC24V NPN signals only; PNP sensors cannot be wired directly;
11. Programs are backed up by supercapacitor. Risk of program loss if power-off duration exceeds 72 ชั่วโมง.

Programming Software for LS K7M-DR14UE (MASTER-K120S)

Full Software Name

KGL-WIN (also written as KGLWIN)

✅ Sole compatible software; XG5000/XGWorks cannot be used for K120S series (XG software exclusively for XGT PLC series, do not confuse).

1. Recommended Version

Stable mainstream release: KGL-WIN V3.66

Supports full MASTER-K series: K10S/K80S/K120S(K7M)/K200S; fully compatible with K7M-DR14UE economy CPU.

2. Supported Programming Languages

LD Ladder Diagram (Most widely used)

IL Instruction List

SFC Sequential Function Chart

❗ST Structured Text is not supported (software limitation of legacy version)

3. OS Compatibility Notes

Originally developed for Windows XP / Win7

Win7: Install and run directly;

Win10 / Win11 (64-นิดหน่อย): Compatibility mode mandatory

การดำเนินการ: Right-click Setup.exe → Properties → Compatibility → Check Run this program in compatibility mode for Windows 7 + Run as administrator. Otherwise communication failures or software crashes may occur.

4. Communication Methods for Program Download

K7M-DR14UE economy version equipped with RS485 only, no RS232 port

Two download solutions:

1. USB to RS485 debugging cable (A/B wiring);
2. RS232/485 converter + LS dedicated download cable.

โปรโตคอลการสื่อสาร: LS proprietary Cnet protocol, Modbus RTU.

5. Important Comparison to Avoid Mistakes

6. ข้อมูลเพิ่มเติม

Software is free, no encryption, hardware dongle not required;

Supports online monitoring and manual I/O force function;

No offline simulation. Physical PLC hardware is mandatory for debugging.

If required, I can provide:

① KGL-WIN communication parameter setup procedure

② RS485 download cable pinout definition

③ Troubleshooting checklist for upload/download errors of DR14UE

Complete Introduction to KGL-WIN Operation Interface (LS MASTER-K120S / K7M Series)

Applicable Model: K7M-DR14UE, Recommended software version V3.66 Chinese Version

Important Premise: KGL-WIN is legacy Windows architecture software. No built-in offline simulation, physical PLC hardware required for debugging; only supports LD Ladder Diagram / IL Instruction List / SFC Sequential Function Chart, ST Structured Text not supported.

1. Global Interface Layout (Top to Bottom)
2. Menu Bar
3. Standard Speed Toolbar
4. Ladder Element Toolbar
5. Left Pane: Project Window (Project Tree)
6. Central Area: Program Main Editor Window
7. ด้านล่าง: Message / Information Window
8. Bottommost: Status Bar
9. Detailed Function of Each Zone

2.1 Top Menu Bar (UI ภาษาจีน)

⚠️ Critical step for new project: Select MASTER-K120S as PLC model. Wrong selection leads to download failure for K7M-DR14UE.

2.2 Tier1: Standard Speed Toolbar

Common icons:

New Project｜Open｜Save｜Program Syntax Check｜Connect PLC｜Download Program｜Upload Program｜Start Monitor｜Stop Monitor｜Run PLC｜Stop PLC｜Find

2.3 Tier2: Ladder Element Toolbar (Core for Programming)

Only active under Ladder Diagram mode, shortcut keys:

F3: ปกติเปิดติดต่อ

F4: ติดต่อปิดตามปกติ

F5: Horizontal Line

F6: Vertical Line

F9: Output Coil

F10: Application Instructions (Timer T, Counter C, MOV transfer, arithmetic operations etc.)

Arrow cursor: Selection mode (move components)

2.4 Left Pane: Project Window (Project Tree)

Fixed four nodes after project creation:

1. Program

Double-click to open ladder editor; location for all logic rung programming.

2. พารามิเตอร์

Not commonly used for DR14UE economy CPU without high-speed counter/PID; parameters for high-speed functions available for standard CPUs.

3. Variable/Comment

Add Chinese comments for X/Y/M/T/C/D operands; comments can be saved locally or downloaded to PLC for maintenance convenience.

4. I/O Assignment

Preview native I/O: X00~X07 (อินพุต), Y00~Y05 (เอาท์พุต); preview address allocation of expansion modules.

2.5 Central Program Editor Window

Core workspace with multi-tab support:

1. Ladder Diagram Mode (ที่พบบ่อยที่สุด)

Program logic written by rung; conducting branches are highlighted automatically during online monitoring;

2. Instruction List Mode (Mnemonic)

Display mnemonic codes; convenient for instruction copy and error troubleshooting; toggle shortcut 【Ctrl+Space】;

3. SFC Sequential Function Chart

Step flow programming, less widely adopted.

Editing Mode Distinction

Offline Mode: Grey title bar; program editing only, no PLC connection;

Online Monitor Mode: Highlighted title bar, real-time operand refresh; I/O force available.

2.6 Bottom Message Window

Two primary functions:

1. Syntax error alert: Red text prompts address error, illegal instruction after compilation;
2. Communication log: Display connect/disconnect status, download progress, PLC fault codes.

2.7 Bottommost Status Bar (Indispensable for Debugging)

Information from left to right:

1. Step number and rung number of cursor position;
2. Communication Status: Offline / Online;
3. PLC operation mode: วิ่ง / หยุด;
4. Monitor enable status;
5. Insert / Overwrite mode;
6. Detected PLC model information.
7. Standard Operating Workflow (Step-by-step Operation)
8. Project → New Project → Select Model【MASTER-K120S】
9. Double-click Program under left project tree to open ladder editor
10. Program logic with ladder element toolbar
11. Click Program Check to eliminate syntax errors
12. Project → Communication Setting: Select COM port (corresponding COM number of USB-to-485 adapter), protocol CNET
13. Online → Connect PLC
14. Online → Download Program (PLC must be under STOP mode)
15. Online → Run PLC, enable monitor to verify logic execution
16. Operation Pitfalls Specifically for K7M-DR14UE (Economy Version)
17. Do not configure high-speed counter, pulse output or PID parameters in software; hardware does not support, download alarm will occur;
18. DR14UE only has RS485 port; do not select RS232 in communication settings;
19. Run Program Check before every download;
20. Offline simulation button is invalid; physical PLC hardware required;
21. Software prone to crash on Win10/Win11: Set compatibility mode Windows7 + run as administrator.
22. Frequently Used Shortcut Keys

Ctrl+Space: Toggle Ladder Diagram ↔ Instruction List

Ctrl+F: Find operand address

Ctrl+H: Replace operand address

Ctrl+G: Jump to specified step number

F3/F4/F9: Quick insert contact / ม้วน

Ctrl+S: Save project