系统程序是由PLC的制造厂家编写的，和PLC的硬件组成有关，完成系统诊断、命令解释、功能子程序调用管理、逻辑运算、通信及各种参数设定等功能，提供PLC运行的平台。系统程序关系到PLC的性能，而且在PLC使用过程中不会变动，所以是由制造厂家直接固化在只读存储器ROM、PROM或EPROM中，用户不能访问和修改。

Okuma BLII-D75A

BL-MC100E-20S

Okuma BLII-D150A

编码器信号输出主要有并行格雷码输出、串行ssi输出、总线型输出、模拟量4~20ma输出。并行格雷码和模拟量输出信号读取简单但不适合长距离传输，串行ssi输出大部分是与西门子plc的ssi模块配套成本较高。现场总线型编码器用通讯方式传输信号，信号遵循rs485的物理格式，连接线少，传输距离远，对于编码器的保护和可靠性就提高了。信号的接收设备只需一个接口，就可以读多个编码器信号，多个编码器集中控制的情况下可以大大节省成本。

选择输出模块时，还应考虑能同时接通的输出点数量。同时接通输出的累计电流值必须小于公共端所允许通过的电流值。如一个220V/2A的8点输出模块，每个输出点可以通过2A的电流，但输出公共端允许通过的电流不是16A（8X2）通常要比此值小得多。一般来说，同时接通的点数不要超出同一公共端输出点数的60％。

1、一个系统中使用的成熟技术至少应占到75%以上

2.设计PLC外围硬件线路

Pepperl+Fuchs Safe Snap Z787.H Zenerbarriere Part no.79140 neuwertig

Fanuc AIF01D A03B-0819-C015 UNUSED

York Controls 1/2Hp 120V Ecm Prog Blower Mtr OEM S1-024-36093-000

Lochinvar Integrated Control OEM 100167825

NATIONAL INSTRUMENTS PCI-6713 HIGH SPEED ANALOG MODULE NI 185030H-01

62.0 MM GO GAGE SMOOTH - THICKNESS 38.5 MM ~ 2.44" X 1.51" METAL INSPECTION

Siemens HF221N 30a 240v fused disconnect safety switch Nema1 New Warranty!

Square D LHL3640030DC1625 400amp 3pole 600v circuit breaker 1 year warranty!

OEM WB49X10134 GE Microwave Turntable Tray

Whirlpool Dryer Timer Knob 3387900

Lennox 104849-04

Fasco 7021-5039

6-cans Rust-Oleum 203024 Caution Yellow Inverted Marking Paint Lot of (6) cans

SUN RACK MOUNT / CABLE MANAGEMENT KIT F370-5707-02

Allen Bradley 1756-M02AE/A ControlLogix 2 Axis Servo Module

Telemecanique Schneider Electric XMG-B Pressure Switch XMG-B002

STOBER DRIVES GEARHEAD K614AG2660MR160/050

ATOMAC 3" 150# LINED BALL VALVE, MODEL# AK3 0003868

Fanuc Daughter Board A20B-2902-0350/03A A20B29020350/03A

SKF Bearing NN3020KTN9/UPW33VR521 in box

SSD / Eurotherm Drives Digitalregler 3G Kompakt 635/K DER 07-PDP Neuwertig

VIPA 317-4NE12 CPU317SN CPU Speed 7 MPI PB DP Ethernet TP CP unbenutzt

Carrier Products 1Hp Blower Motor OEM HD52AE155

Tecumseh Comp R-134A Btu AEA2410YXA Replaced By Danfoss New Part# SC12G-1

SCIENSCOPE SSZ MICROSCOPE BODY with NO OPTICS

MITUTOYO 102-225 OUTSIDE MICROMETER 50MM WITH WRENCH AND CALIBRATOR

GE TED134060 3pole 60amp 480v circuit breaker 1 year warranty!

Siemens ITE ED43B030 3pole 30amp 480v circuit breaker ED type Warranty!

425D404G9 - GE MOLDED ARC CHUTE ASSEMBLY, BLACK TOP

Square D G2LA NSFP **GENUINE**

Honeywell SV9520H8513

AO Smith 100113112

SQUARE D SCHNEIDER ELECTRIC 1-PHASE 1KVA 60HZ TRANSFOMRER C1S7F

MILNOR, P/N 08BSPE1B PROCESSOR BOARD, REV A

YASKAWA ELECTRIC CORP SGMP-01AWYR12 SERVO MOTOR

Beckhoff BK5200 DeviceNet Coupler Bus to Terminal Blocks Din-Rail Mount

ROHRBACK COSASCO CORRATER PROBE 67000-S31600-6.75-1.0-71 W/ ELECTRODE

MECO 6" X 10.5" SPLIT SEAL STAINLESS AHSLXW550

Fanuc Servo Motor A06B-0127-B077 A860-0365-T101 A6/2000

Hardinge XV-710 Y-Axis Way Cover AK2802A 29.5 X 9 X 8.5 !

Omron Sysmac CJ1M-CPU12 CPU12 CPU UNIT + 128 MB Compact Flash Industrial

SICK Tastender Laser Scanner PLS100-111 1011769

Copel Comp R-410A 91503 ZP90***-***-** Replaced By Danfoss New Part# HCJ090T4LC6

Carrier Products Economizer Exv OEM EF05BD332

2X CONCEPT TOOLING INC 9429501-01 CATHODE BLOCK ~ PLATING STATION

3M POWER-CORE OPTICAL FIBER OPTIC CABLE LINE 1000 METER 1 KM SMF28 SMF-28

GE Spectra SRPF250A70 70amp circuit breaker rating plug new in box Warranty!

GE TEC36007 3pole 7amp current limiter circuit breaker

Maytag Dryer Motor, Part No 40099801, S58NXMZD-6910

New listing KENMORE REFRIGERATOR LEFT TRACK PART # 2261448

AO Smith 100110102

Nu-Calgon 4050-12

2 Hynix 2 GB DDR3 1333 MHz PC3 10600 240 Pin DESKTOP RAM Memory HMT125U6TFR8C-H9

Lot of 2 Cisco RSP16 ROUTE SWITCH PROCESSOR 16 For Cisco 7500 Router

MAC PNEUMATIC 6313D-511-PM-501DA Solenoid Valve PME-501DAAG

Airtrol F-4000-30 Adjustable Deadband Pressure Electric Switch

ATHENA CONTROLS 0 - 1400 DEG F. TEMPERATURE CONTROLLER 6075-S

Armstrong #881 Steam Trap 1/2" NPT, Part# C5297-50

Fanuc Robotics A660-2005-T255 (XGMF-13487)

Fanuc Daughterboard A20B-2901-0941/02A A20B29010941/02A

Telemecanique / Schneider Electric ATV31 ATV31HU15M2 1,5kW 2HP 230V Top Zustand

Rexroth PM Motor MSK070D-0300-NN-S2-UG0-RNNN Servomotor Synchron unbenutzt

Honeywell Steam Humidifier 9Gal W/Ro OEM HM609A1000

Parker P-487 7/8" Odf Drier Shell OEM 400701

10X AMP BNC CONNECTORS 1-413589-0 CONN BNC PLUG STR 75 OHM CRIMP

HP AGILENT 83400A LIGHTWAVE SOURCE MODULE WITH OPTION 011 1300NM 83400A-011

GE THFK236F000 200amp 3p 600v circuit breaker type Hi-Break warranty

Siemens ITE ED42B100L 2pole 100amp 480v New in box warranty! ED42B100 type ED4

Cutler-Hammer EHD3020L | 3 Pole 20 Amps 480 VAC Circuit Breaker.

Luber-Finer LFP5570 Reman Auto Trans Filter Kit

AO Smith 100111987

AO Smith 9006246005

PRESCOLITE EMERGENCY EXIT SIGN 2 SIDED COMPASS DIECAST Red LED XD2REN-W White

Square D Current Transformer 600V, 4000:5 Ratio Cat# 140R-402

Lot of 4 Westinghouse Air Brake Wabco P5516 Relay Valves

Schrader Bellows Par 15 W01533115 Programmable Air Regulating 3 Way Valve

DSI 1" 150# 316 STAINLESS STEEL GATE VALVE, #1131-E16-18

RONAN PS SERIES POWER SUPPLY 115-24-750

Fanuc Straight Shaft Keyless Motor W/ Brake A06B-0147-B175 A860-0360-V501

MT Indexable Live Tool Holder MTAMAT4675-3.2 MTAMAT46753.2

Fanuc A06B-0128-B176#7000 Servo Motor Top Zustand

Siemens 3RW4425-1BC45 AC Semiconductor Motor Starter 30-55kW NEUWERTIG TESTED

WH12X10154 GE Control - Speed Genuine OEM WH12X10154

Lochinvar Dual Control OEM 100110186

ANDO AQ8201-02 DISPLAY CONTROLLER WITH RACK MOUNT EARS

NEWPORT KENSINGTON LABS AXIS MODULE ~ MPM PM500-C PM500-C6 CONTROLLER 4000-60002

Cutler Hammer FD2225 circuit breaker 2pole 225amp NEW! Warranty

GE 1200amp SKHA36AT1200 with enclosure TK4V1200S circuit breaker New 1ywarranty!

Allen-Bradley X-247035 10A Non-Inductive Pilot Duty Timer

Ingersoll Rand Pneumatic Limit Valve 402-A

Lennox 98M40

Honeywell V8944N1038

Cal-Mil One by One Condiment Station Black 1148-13 New in box

Snom IP 715 Phone with 4 Line Display and POE VoIP Phone

Moog 066 4Z2 702G 280 Bar Servo Valve MAINSTAGE ONLY L05HPBUFNSF 2 24VDC

Yaskawa AC Servo Motor USAREM-01YR41 w/ Motor

SCHUTTE & KOERTING TRI-FLANGE STEAM EJECTOR - UNIT SIZE: 1" S4C LOW VAC EJ

ROTORK QUARTER TURN MANUAL GEARBOX w/ REDUCER AB6800N/SP4

CFF Stainless Steel Ball Valve 06056560

General Electric Motor Control CR309C0*BAA CR309C0BAA