PLC的一个扫描周期必经输入采样、程序执行和输出刷新三个阶段。

PLC在输入采样阶段：首先以扫描方式按顺序将所有暂存在输入锁存器中的输入端子的通断状态或输入数据读入，并将其写入各对应的输入状态寄存器中，即刷新输入。随即关闭输入端口，进入程序执行阶段。

福州卓凯电子科技有限公司
  24小时销售技术服务热线 ：17705012279;0591-22983857
  传真（Fax）：0591-22989937
  商务QQ ：879520885

联系人： 林女士（ 销售经理 ）
  地址：福州市闽侯西江滨大道77号正荣润园一号楼1205室

产品价格以电话或者QQ询价为准，发布价格不做参考

欢迎来电咨询，我们将会给您**的服务！                      

产品详细信息，欢迎来电查询！

只要是您想要的，我都能帮您找到，价格从优！

您急需的产品，请联系我们！

您询不到的产品，请联系我们！

您买不到的产品，请联系我们！

Heidenhain 9-Pin Cord Set 43in OAL Male/Female

Heidenhain Corp 237 133 C6 LS 704 Linear encoder scale housing 320mm

Heidenhain Corp ROD 426 2500 01-03 295 434-07 Rotary Encoder

Heidenhain Corp ROD 426 2500 01-03 295 434-07 Rotary Encoder

Heidenhain EXE 602 E D83301 Interpolation Digitizer Module

Heidenhain ROD 486 2048 03S12-03 376 886-31 Rotary Encoder

Heidenhain ROQ 425 512 27 Rotary Encoder

HELAC L10 -9.5-E Hydraulic Rotary Actuator

HELAC L10-9.5-E-RF-185-S1-0-H Hydraulic Rotary Actuator

Helwig Carbon 30-391215-185-3-01 10mm X32mm X37mm Brush

Hennell LM-MP1-BR Hydraulic Cylinder 6" Bore 24" Stroke

Hennells GMA-MT1-B Hydraulic Cylinder 5" Bore 10" Stroke

Hennells HM-MDS2-BR Hydraulic Cylinder 1-1/2" Bore 5" Stroke Double Rod 1500 PSI

Hennells HM-MF1-BR Hydraulic Cylinder 2" Bore 1" Stroke w/Cushions 1500 PSI 2X1

Hennells Hydraulic Cylinder 1-1/2" Bore 7" Stroke Double Rod 1500PSI

Hennells SHD2-MDF1-MS2-NC Hydraulic Cylinder 1-1/2"Bore 7" Stroke Double Rod End

Herc-alloy 558618 7/32" Eye Sling Hook W/ Latch 2700 lb. Work Load

Herc-alloy 558618 7/32" Eye Sling Hook W/ Latch 2700 lb. Work Load

Hertel 4.21103R614 Carbide inserts cutting tools grade C4F 10 pcs

Hertel TPKN2204PDR CF3 Carbide inserts cutting tool 6 pcs

Hertel TPKN2204PDR KM1 Carbide inserts cutting tool 17 pcs

Hewlett Packard 35900C 35900 HP Dual Channel Interface Module -Untested

Hewlett Packard 6264B DC Power Supply 0-20V 0-20A

Hex Bore Bearing 1-3/4" OD 3/8" Hex Lot of 20

Hex Bushing Galvanized Malleable Iron 2 x 3/4" Pipe Reducer Class 150 Lot of 4

Hex Bushing Galvanized Pipe Reducer 1-1/2 x 1/2" NPT Malleable Iron CL-150 Qty4

Hex Bushing Galvanized Pipe Reducer 2 x 3/8" NPT Malleable Iron Class 150 Lot-2

Hex Bushing Galvanized Pipe Reducer 3/4 X 1/2"NPT Malleable Iron 150 Lot of 6

Heyco 400 19mm Metric Combination Wrench 9" OAL Germany 19mm

High Speed Precision Ball Bearing Aluminum Conveyor Roller 1-1/2"x19"L 5/8"Shaft

High Speed Precision Ball Bearing Aluminum Conveyor Roller 2"x24" Long 3/4" Bore

High Speed Precision Ball Bearing Aluminum Conveyor Roller 2.84" Dia 23.75" Long

High Speed Precision Ball Bearing Aluminum Conveyor Roller 2-1/4"x19-7/8" Long

High Speed Precision Ball Bearing Steel Conveyor Roller 2-1/2" Dia 22-1/4" Long

Hills-McCanna A11-0830 Teflon Valve Diaphragm 7-1/2" x 7"

Hilma-Rumheld Hydraulic Hollow piston Single Acting T-Slot Clamping Cylinder

Hilti 000423244 RH 120-214S .120 dia x 2-1/4" Long Screw Nail Quantity 5000

Hilti 12-14x1"Hex Washer Head Self tapping Drilling Screw Zinc # 3 point Qty3000

Hilti DD-B 152/430mm Diamond Core Bit 6" x17" Masonry Drill Core Bit

HILTI X-DNI 19P8 Steel Concrete Fastening Nails 25/32" Length Box of 100

Hinged Latched Door Pull Junction Box 12"x12"x6

Hitachi 6GMU9 Rotary Compressor Single Phase 208/230V 15559 Btu R410A

HITACHI SEIKI JANCD-CG-H/(27) HT20SII Circuit Board JANCD-CG26-H

Hitachi Seiki NR-20 Rollup Style Way Cover Taken From A CNC Lathe

Hiwin HGW15CCH 62891-1 280MM linear guide rail w/flange type bearing lot of 2

HMW-4024 MHB-015-LEDH-51N Hydraulic Welded Cylinder 4" Bore 24" Stroke 3000 PSI

Hobart E6011 335A Stick Electrode Arc Welding Rods 3/32"x14" 30Lbs 6011

Hoerbiger-Origa P124-S/22X24-BM Pneumatic Air Rodless Cylinder 40mm Bore 120 PSI

HOERBIGER-ORIGA P126-S/30x760MM Pneumatic Air Cylinder Rodless 63mm Bore

Hoffman 6 x 4 x 4" Cut-out Box Electrical Enclosure Hinged Cover

Hoffman A-1212CH Electrical Enclosure Cut Out Box 12"x12"x6" W/Back Plate

Hoffman A-362408LP 36x24x8" Wall Mount Electrical Box/Enclosure w/ Backplate

Hoffman Design Aire D-TEMA Temperature Switch

Hoffman Design Line Cabinet 12x12x6" Jic Box Type 4

Hoffman E19SWM12U20 Swing-Out Wall-Mount 12 Rack Unit 25-1/2"H Versarack

Hoffman E2PB 2 Hole Push Button Enclosure 5.75"Lx3.25"Wx2.75"T 30.5mm Holes

Hoffman Enclosure A242012LP Industrial control Panel box 24"H x 20"W x 12"

Hoffman F-44T18HC Wire Trough 4x4x18" Hinged Lid  Flat Iron Inside Holes

Hoffman Pushbutton Enclosure Box 6-Switch 800E-3X01 Wall Mount 8x10x4" Type 12

Hoffmann A-30SA2610LP 30x25-3/8x10" Disconnect Enclosure w/Backplate type 12,13

Hold Down & Stop For CNC Router Vacuum Table Air Pneumatic 4 3/4" Diameter

Holo-Krome 1-8 x 3-1/2" Inch UNC Socket Head Cap Screw Bolt USA

Holo-Krome 3/4-10x6" UNC Socket Head Cap Screw Bolt USA Lot of 10

Hommel T5E T500 Portable Surface Roughness Measurement Pickup