Wecon LX Series User Manual

WECON Technology Co., Ltd.
1
WECON
Programming
WECON Technology Co., Ltd.
Website: http://www.we-con.com.cn/en
Technical Support: chengxf@we-con.com.cn
Skype: Jason.chen842
Phone: 86-591-87868869

Wecon LX Series Specifications

General

Series	LX Series
Display	TFT LCD
Operating System	Linux
Category	Controller
Touch Panel	Resistive
CPU	ARM Cortex-A8
Communication Ports	RS232, RS485
Power Supply	24V DC
Operating Temperature	0°C to 50°C
Storage Temperature	-20°C to 60°C
Humidity	10% to 90% (non-condensing)

Summary

What is a Program?

Outline of Basic Devices Used in Programming

X: Physical Inputs

Identifies all direct, physical inputs to the PLC.

Y: Physical Outputs

Identifies all direct, physical outputs from the PLC.

T: Timing Devices

Identifies timing devices within the PLC.

C: Counting Devices

Identifies counting devices within the PLC.

M and S: Internal Operation Flags

Used as internal operation flags within the PLC.

How to Read Ladder Logic

Load, Load Inverse

LD (Load)

Initial logical operation contact type NO (normally open).

LDI (Load Inverse)

Initial logical operation contact type NC (normally closed).

Out

OUT (OUT)

Final logical operation type coil drive.

Timer and Counter Variations

Double Coil Designation

And, And Inverse

AND (AND)

Serial connection of NO (normally open) contacts.

ANI (AND Inverse)

Serial connection of NC (normally closed) contacts.

Or, Or Inverse

OR (OR)

Parallel connection of NO (normally open) contacts.

ORI (OR Inverse)

Parallel connection of NC (normally closed) contacts.

Load Pulse, Load Trailing Pulse

LDP (LoadPulse)

Initial logical operation Rising edge pulse.

LDF (Load Falling pulse)

Initial logical operation Falling / trailing edge pulse.

And Pulse, And Trailing Pulse

ANP (ANd Pulse)

Serial connection of Rising edge pulse.

ANF (ANd Falling pulse)

Serial connection of Falling / trailing edge pulse.

Or Pulse, Or Trailing Pulse

ORP (OR Pulse)

Parallel connection of Rising edge pulse.

ORF (OR Falling pulse)

Parallel connection of Falling / trailing edge pulse.

Or Block

ORB (OR Block)

Parallel connection of multiple contact circuits.

And Block

ANB (ANd Block)

Serial connection of multiple parallel circuits.

MPS, MRD and MPP

MPS (Point Store)

Stores the current result of internal PLC operations.

MRD (Read)

Reads the current result of internal PLC operations.

MPP (POP)

Recalls and removes the currently stored result.

Master Control and Reset

MC (Master Control)

Denotes the start of a master control block.

MCR (Master Control Reset)

Denotes the end of a master control block.

Set and Reset

SET (SET)

Sets a bit device permanently ON.

RST (ReSeT)

Resets a bit device permanently OFF.

Timer, Counter (Out & Reset)

OUT (OUT)

Driving timer or counter coils.

RST (ReSeT)

Resets timer and counter, coils, contacts.

Normal 32 bit Counters

High Speed Counters

Leading and Trailing Pulse

PLS (PuLSe)

Rising edge pulse.

PLF (Pulse Falling)

Falling / trailing edge pulse.

Inverse

INV (Inverse)

Invert the current result of internal PLC operations.

No Operation

NOP (No Operation)

No operation or null step.

End

END (END)

Forces the current program scan to end.