当用PLC进行网络设计时，其难度比PLC单机控制大得多
PLC程序的正确性。
正确的程序必须能经得起系统运行实践的考验。
PLC程序的可靠性。
能保证系统在正常和非正常（短时掉电、某些被控量超标、某个环节有故障等）情况下都能安全可靠地运行。
能保证在出现非法操作（如按动或误触动了不该动作的按钮等）情况下不至于出现系统失控。
PLC参数的易调整性好。
经常修改的参数，在程序设计时必须考虑怎样编写才能易于修改。
PLC程序结构简练。
简练的程序，可以减少程序扫描时间、提高PLC对输入信号的响应速度。
PLC程序的可读性好。
JW Froehlich MPS 40 sonder Test Unit, Type# w/ Boards,
Bison #5 MT Live Center for Lathe, # S,
NUM Servomac Milano PCB Board, 2UACLACQF356,
Lg Qty REXROTH BOSCH HE PNEUMATIC SOLENOID PILOT VALVES(?)
UE United Electric SpacePak D921T06-A20 Temperature Controller
Allen Bradley 1746-NI4 Analog Input Module Ser A Free Shipping! 1746-N14
Festo 18980 Pneumatic 24 VDC Intell. Valve Manifold VIFB-03-B VIGI-03-4.0
SMC CDBM2B25-195A-RN-C73S Pneumatic Cylinder D-C73 CDBM2B25195ARNC Free Ship
Siemens Simoreg D Mreq-GcG6V57-2E0, 6 RA 2628-6DV57-0,
Diversified Electronics TDT24AKA060 Time Delay Relay Timer 24V FreeShip
Cutler-Hammer C799AG9 Enclosure for Lighting Contactor 12" x 9" x 4" FreeShp
Greenfield 14560 Tap Set (3) Taper, Plug, Bottom 5303 1"-12 NF H4 TRW
ISRA Vision Systems AG, Intel Memory PC Board, TL-SBC, W/ Daughter Boards,
GE Fanuc Model OS AC Servo Motor, # A06B-0313-B706 #0075, AT103,
Yaskawa AC Spindle Unit, CIMR-MTIII-11K.2, w/ Position Coder Orientation,
Telemecanique VX5A66106 Gate Driver Board ATV66D46N4 Male Ends
Fanuc PC Daughter Board, # A20BC,
Parker / Compumotor Brushless Servo Motor, Model 635, 3000 RPM, 230 VAC
Tescom Regulator JRU2-37?6 SEALED
Ashcroft B464B 15psi XCHJKLENN Snap Action Pressure Switch
Honeywell W7400D1005 Programmable Logic Controller
Littelfuse JTD 100 ID Fuse Class J Current Limiting POWR-PRO 600 VAC
Honeywell Low Level Analog Input
Lg Qty Available Measurement Technologies MTL4541 Smart Transmitter Repeater
Take Systems LCDXROM2-01 Circuit Board PCB Free Shipping! LCDXR0M2-01
OEM QMS a Konica Minolta Black Developer Lg Qty
Fanuc 21i-TA Controller, A02B-0247-B541,
Used Dyson DC14 Port Plate
IFM Efector OU5001/OUF-HPKG Fiber-optic Amplifier Sensor Free Shipping
Bosch Servo Drive Unit, # PE 100 / 0 608 830 093,
Honeywell WBR-AK Base Radio XYR5000 Wireless Transmitter
IBM 87X4701 Detect Head Interface Board
Proface AGP3000H-ADPCOM-01, ,
Automation Direct 781-1C-SKT
Mitsubishi Servo Drive Unit, MR-SE01, , 90 Day
Dymatrix AVPVM-F19IFO Valve
Simplex White Fire Alarm Trim Plate Free Shipping!
Agastat Model 7012EK with 30 Day Warranty
Toshiba TOSVERT-130G2, 7.5 HP Transistor Inverter VT130G2U2080,
Rosemount 78N11C60N180 Transmitter
Fanuc Servo Amplifier Unit, A06B-6079-H207, Series C,
GE CR115GW11137 Limit Switch General Electric CR115GW 11137 Free Shipping!
Lot of 100 CSE MP-12-12 Hydraulic Fitting
Putco 99913 Firemans Cross Designer Truck Body Art Metal Decal
New? Used? Canon EB-65 Ethernet Board FH5-3236 warranty
Hubbell Pulsecom L2/2 Coupler Module Board 169215L2/2
SMC VPWG Pneumatic Valve 24 VDC Coil Free Shipping VPW G
Toshiba / Tosnuc 70A Power Supply SR700,
Allen Bradley 8510A-A11-A2 Digital AC Spindle Drive 8510
El Hagiwara I/O Circuit Board, D CC,
ABB 1SA M45 0000 R1003 Starter
Used Tested Cutler Hammer 5ACLS-18R Double Barrel Fuse Inv#8
10" SCA 3-Jaw Lathe Chuck, A8 Mounting, Made in Sweden,
Asco 8262B212 Red-Hat Valve 120 VAC Coil Uses Rebuild Kit 304354 Free Ship!
Numatics B Solenoid
Allen Bradley Data Highway II Computer Interface, 1779-KFMR,
Used Dyson DC14 Port Plate
10.4" TFT Monitor, MSC-801, E77226A01 Mori Seiki CL-05 Turning Center,
Merlan Scientific Champ II Interface w/6 Sensors & Probes for Mac C21000B
Used MDC Angle Valve
Fanuc PC Daughter Board, A20BB,
Vickers Eaton CXP Valve Block
General Electric TPME277Y08PP Surge Suppressor GE with Ferraz Shawmut SS200-4
Veriflo 944SSFS8MF Valve
Lot of 3 Apex 483 Phillips #3 Head Bit 7/16" Hex Drive, 3-1/2" Cooper Tools
IBM 87X4701 Detect Head Interface Board
Omega PSW-108 Pressure Switch 3-100 PSI 15A 480VAC Free Shipping!