编程器是PLC的最重要外围设备。利用编程器将用户程序送入PLC的存储器
用户程序又称为应用程序，是用户为完成某一特定 的控制任务而利用PLC的编程语言编制的程序。 来自PLC之家。
用户程序通过编程器输入到PLC的用户程序存储器中。
可编程控制器是通过程序对系统进行控制的，所以各种机型的PLC都有自己的编程语言。
PLC的编程语言有多种，如梯形图、语句表、逻辑功能图、逻辑方程式等。下面介绍常用的梯形图和语句表编程语言。
IFM Efector AC1218 AC-1218 AS-i Power Supply
Fanuc AC Servo Motor 3-OF, Type A06B-0369-B259 #0003,
Endress & Hauser PMC131-A11F1A2G Cerabar-T Pressure Transducer
Lot of 100 Terminals AMP 16-14 AWG with #8 Stud Hole Non-Insulated Free Shipping
Hitachi SJHFU Sensorless Vector Control, 5 HP, V,
General Electric IC693MDR390B Mixed I/O 24VDC Input/RLY Output Module GE
Lot of 90 New? Imation 3M Royal Guard 3480 210mb Tapes
Allen Bradley 2801-NC19A Camera Cable, 5 Meter Vision Accessory, Free Ship
OEM Genuine IBM 90H3568 Usage Kit OPEN BOX
Norgren Olympian LMPD0, BA3L0 Lubricator,
Yokogawa F9167BU F9165VC-4 Transmitter Board with Instructions
Mitsubishi Melsec AX41 Programmable Controller Input Module
Royal TS451C-8 Axial Fan 115 VAC Ball Bearing 120 x 120 x 38mm Free Ship!
Lq Qty Duraflo Composite Screen Axiom AX-1 API120 WAXCXR200C 117 Microns
AB Allen Bradley 120663 Display Board
30 day AEC International 503390 Control Board TDW-1C
Gusher Pump, 11019NS-SE-7-A, 3/4 HP, 3 Phase,
30 day GUARANTEE Toledo Tranducer PLC PCB Board 2631
ETA Systems PD8 Conditioned Power Distribution 15 Amp Rack Mount Free Shipping!
New(?) Racal-Vadic VA1244 Card
OEM HP C4198A 220v Fuser Unit 4500/ 4550 SEALED BOX
Woodhead 80256-A Cable 3 wire, 4 Pin Micro-Change Brad Harrison Free Ship 80256A
Enduro T-581 ABAWF/00 SY43408 CR065086 Bearing
Omron Interface Touchscreen, NSJ8-TV01B-G5D, ,
Technology 80 1228 Circuit Board PCB 800086
Reliance Electric 10 HP AC Inverter VS Drive 575V 3 Phase GP-2000 2GU51010
Honeywell V88A 1618 V88A1618 Valve
Box of 10 Gould Shawmut TRS1/2R Fuses
Eagle Signal HP517B6 Adjustable Timer CYCL-FLEX 240 VAC, 5 Second
BS&B 3" Type RLS 269101 316/INC A
EMCO DEV Rotor Free Shipping! 100005DEV
系统总点数及扩展模块的数量都有限制，当扩展仍不能满足要求时，可采用网络结构
