PLC工作过程的特点 ：：

(1)PLC采用集中采样、集中输出的工作方式，这种方式减少了外界干扰的影响。

(2)PLC的工作过程是循环扫描的过程，循环扫描时间的长短取决于指令执行速度、用户程序的长度等因素。

(3)输出对输入的影响有滞后现象。PLC采用集中采样、集中输出的工作方式，当采样阶段结束后，输入状态的变化将要等到下一个采样周期才能被接收，因此这个滞后时间的长短又主要取决于循环周期的长短。此外，影响滞后时间的因素还有输入滤波时间、输出电路的滞后时间等。

(4)输出映像寄存器的内容取决于用户程序扫描执行的结果。

(5)输出锁存器的内容由上一次输出刷新期间输出映像寄存器中的数据决定。

(6)PLC当前实际的输出状态由输出锁存器的内容决定。

Spears Reducer Bushing 1-1/2" X 1/2", Spig X FPT, P/N 838-209, Lot Of 11 #101A4

Spears Reducer Bushing 1 1/2" X 1/2", Spig X FPT, P/N 838-209, Lot Of 10, #745

Spears Male Adapter 1.25" Pvc, 836-012, Lot Of 20, 836012, Shipsameday #114K

SPEARS Ball Valve Inline True Union, 1829-005, 1829005, Lot of 4, SHIPSAMEDAY

Spears 839-209 Resucer Bushing1 1/2" X 1/2", MPT X FPT, 839209, Lot Of 8 #101A13

Span Theumling Pressure Gauge,30 PSI, 1/4" VCR, 21-0119-C1, ShipSameDay#1628D9

SP07843, 1-AWA-3926N-EXT2, 1AWA3926NEXT2, W/2-3 Dayshipping #1472AJ

SOURIAU/Amphenol Circular Connector, MIL-DTL-38999, MS27656T23F35PC #BOX 13

SOURIAU Circular Connector PLUG HSG FMALE 53PO, SMS27467T23B53SB-LC #BOX 13

SONY MEASURING GAUGE CONTROLLER, LT20-101, Shipsameday #125N1

Sony Laserscale DPR-LS21, 1-675-992-11, DPRLS21, AD10-1212-5, Shipsameday#1226Q

Sony Floppy Drive MPF920, 93912379, ShipSameDay W/2-3daysshipping#1472M

Sola/Hevi-Duty TRANSFORMER 120/240V, 1PHASE, HS19B250, Encapsulated, RACK G#G47

Sola Hevi Duty Power Supply 83-12-250-03 DC 12Vdc, 831225003 #1632B

Sola DC power supply SCP30S5-DN 5vdc SCP30S5DN, SHIPSAMEDAY #1541Z

Sola 83-05-312-03, Power Supply, 083-00312-0300-05, Shipsameday

Socket Source SST SOCKET HEAD Vented 1/4-20 X 3/4", SHS04C012V, Lot 32 BOX =160

Snap-Tite Nipple Female Pipe 1/2", SS72N8-8F & SSH4-63, LOT OF 7, SHIPSAMEDAY

SMSC LAN9215-MT, A0631-A1C19, 8R501869, LAN9215MT, A0631A1C19, Lot Of 5, D#61

SMITH Carbonator Pump 1/3 HP, 115/230V, 1 PH, 1725/1425 RPM, S48A62A01

SMC/NUMATICS SOLENOID FILTER AF30-03-8 L11BA4520, 041BA4Z1MN000F, R21BW4Z3ML000F

SMC VVQ4000-25AR-1, VVQ400025AR1, Shipsameday W/2-3daysshipping #1642G

SMC VV5Q11-10C6FU3, VV5Q1110C6FU3, Ship Same Day #1651AD

SMC VQ5100-5-04T, TVQ5A02, VQ5100504T, Shipsameday #1642P

SMC VPS2135021T, VPS2135-021T, Shipsameday #1177A33

SMC VNB214BS-N15A-5GS-B, VNB214BSN15A5GSB, 24VDC 1/2" Shipsameday #109R

SMC VHS400-04, VHS40004, Ship Same Day W/2-3 Days Shipping#1651B24

SMC VFS4100-1FZ, VFS41001FZ, Mainifold ShipSameDay W/2-3 DaysShipping#1173B

SMC Vacuum Switch ZSE10116, ZSE1-01-16, Shipsameday #1627B1

SMC Vacuum Pressure Switch ZSE1-01-17CL, SHIPSAMEDAY #1621A71

SMC Vacuum Pressure Switch , ISE2-01-15CL, SHIPSAMEDAY#1621A9

SMC V114-5MOZ, V114-5M0Z, base mount; NC; 24VDC, Lot of 5, SHIPSAMEDAY#129V18

SMC SS5Y51-E4Q014, SS5Y51E4Q014, ShipSameDay W/2-3 DaysShip #1642Y

SMC SOLENOID VALVE, VQ1A01-5, VQ1A015, LOT OF 2, SHIPSAMEDAY #1534Q39

SMC SOLENOID VALVE, VQ1200NY-5-X35, VQ1200NY5X35, LOT OF 3, SHIPSAMEDAY #1534Q35

SMC SOLENOID VALVE VQZ335-5M1, VQZ3355M1, SHIPSAMEDAY#1176C2

SMC SOLENOID VALVE VQZ1221-5M1-C4, VQZ12215M1C4, SHIPSAMEDAY#1176B7

SMC SOLENOID VALVE VQ1341N-5LOB-N7, VQ1341N-5L0B-N7, SHIPSAMEDAY#1176B6

SMC SOLENOID VALVE VG342R-5DZ-06N, VG342R5DZ06N, EVG0B36, SHIPSAMEDAY #1650A9

SMC Solenoid Valve VF5220-5G-02, VF52205G02, SHIPSAMEDAY #1555R

SMC SOLENOID VALVE SY7340-5LZ-03, SY73405LZ03, SY7GG75, #1631L

SMC SOLENOID VALVE SY5120-5LOZD-C8-F2, SY5120-5L0ZD-C8-F2, SHIPSAMEDAY#1176C4

SMC SOLENOID VALVE SY3320-5LOZD-M5, SY3320-5L0ZD-M5, SHIPSAMEDAY#1176B10

SMC SOLENOID VALVE SY3120-5LOZD-M5, SY3120-5L0ZD-M5, SHIPSAMEDAY#1176C1

SMC SOLENOID VALVE SV3100-5FU, SV31005FU, SHIPSAMEDAY#1176B8

SMC SOLENOID VALVE SV2300-5W2U-02T, SV23005W2U02T, SHIPSAMEDAY#1176B5

SMC SOLENOID VALVE 4/5 PORT 110V, VSP4234-003DL, V0301P1-003G, SHIPSAMEDAY

SMC SOLENOID VALVE 4/5 PORT 110V, VSP4234-003DL, V0301P1-003G, Lot Of 2

SMC SOLENOID VALVE 3/8" FNPT, VCA41-5DL-10-03-F, SHIPSAMEDAY#1176A10