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HIMA F3236HIMA F3236

  工業(yè)控制中，除了用數(shù)字量信號(hào)來控制外，有時(shí)還要用模擬量信號(hào)來進(jìn)行控制。模擬量模塊有三種：模擬量輸入模塊、模擬量輸出模塊、模擬量輸入/輸出模塊。
    (Ⅰ) 模擬量輸入模塊
    模擬量輸入模塊又稱A/D模塊，將現(xiàn)場(chǎng)由傳感器檢測(cè)而產(chǎn)生的連續(xù)的模擬量信號(hào)轉(zhuǎn)換成PLC的CPU可以接收的數(shù)字量，一般多為12位二進(jìn)制數(shù)，數(shù)字量位數(shù)越多的模塊，分辨率就越高。
    (Ⅱ) 模擬量輸出模塊
    模擬量輸出模塊又稱為D/A模塊，把PLC的CPU送往模擬量輸出模塊的數(shù)字量轉(zhuǎn)換成外部設(shè)備可以接收的模擬量（電壓或電流）。模擬量輸出模塊所接收的數(shù)字信號(hào)一般多為12位二進(jìn)制數(shù)，數(shù)字量位數(shù)越多的模塊，分辨率就越高。
1.3.2  PLC的軟件組成
    PLC控制系統(tǒng)的軟件主要包括系統(tǒng)軟件和用戶程序。系統(tǒng)軟件由PLC廠家固化在存儲(chǔ)器中，用于控制PLC的運(yùn)作。用戶程序由使用者編制錄入，保存在用戶存儲(chǔ)器中，用于控制外部對(duì)象的運(yùn)行。
    1）、系統(tǒng)軟件
   手機(jī)

： 

 Qq:

鄭娟萍

廈門仲鑫航自動(dòng)化設(shè)備有限公司

 系統(tǒng)軟件包括系統(tǒng)管理程序、用戶指令解釋程序、標(biāo)準(zhǔn)程序模塊及系統(tǒng)調(diào)用。整個(gè)系統(tǒng)軟件是一個(gè)整體，它的質(zhì)量很大程度上影響了PLC的性能。通常情況下，進(jìn)一步改進(jìn)和完善系統(tǒng)軟件就可以在不增加任何設(shè)備條件下大大改善PLC的性能，使其功能越來越強(qiáng)。
2）用戶程序
    PLC的程序一般由三個(gè)部分構(gòu)成：用戶程序、數(shù)據(jù)塊和參數(shù)塊。用戶程序是必選項(xiàng)，數(shù)據(jù)塊和參數(shù)塊是可選部分。
用戶程序即應(yīng)用程序，是用戶針對(duì)具體控制對(duì)象編制的程序。PLC是通過在RUN方式下，循環(huán)掃描執(zhí)行用戶程序來完成控制任務(wù)的，用戶程序決定了一個(gè)控制系統(tǒng)的功能。
    一個(gè)完整的用戶程序應(yīng)當(dāng)包含一個(gè)主程序、若干子程序和若干中斷程序三大部分。

NEW FAG NEEDLE BEARING HK 2020 HK2020

SKF Rubber Sealed Ball Bearing w. Snap Ring 6209 2RSNRJEM 6209-2RS1NR/C3GJN New

SKF ANGULAR CONTACT BALL BEARING 7208 BYG 7208BYG 7208 BG 7208BG NIB

Torrington Needle Bearing B-136 B136 New

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Dodge 2-Bolt Flange Bearing LFTSXV100-MOD LFTSXV100MOD 6676700-012 New

McGill Cam Follower Camfollower Bearing CF-7/8-S CF78S CF 7/8 S New

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McGill Inner Race MI 16 MS 51962 11 MI165196211 New

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Dodge SC Pillow Block Bearing 123835 204 1/2" Bore New

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Consolidated Angular Contact Bearing 7209M 7209 New

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NDH Sealed Bearing 77505 3205 1" ID New

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Fafnir Torrington Sealed Ball Bearing 303KDD New

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Martin Keyed Tapered Bushing 1210 3/4 121034 New

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EMPRO SHUNT 3940-200 3940200 50MV 20 AMP A 20A MLA - USED

SKF ROLLER BEARING 21310C/3 21310 C/C3 NEW

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Dodge 2-Bolt Flange Bearing LFTSC103 MOD LFTSC103MOD 1-3/16" Bore New

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Nachi Single Groove/Row Radial Ball Bearing 62/28N 6228N New

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CONSOLIDATED STEYR BEARING 6004-2RSNR 60042RSNR F67 8244 F678244 6004 NIB

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Timken Tapered Roller Bearing Cone 570 New

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McGill Cam Yoke Roller Bearing CYR-3/4 CYR 3/4 CYR34 New

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FANIR BALL BEARING S10P S10P C3 S10PC3 NIB

Timken Taper Bearing w/ Outer Race 32208 Y-32208 X-32208 New

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MRC Shielded Ball Bearing 306SFF C306 30X72X19MM New

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SKF Tapered Roller Bearing 32214 J2 32214J2 New 

FAG MB Thrust Bearing 51/53310 5153310 New

Seal Master SealMaster Insert Bearing 2-113 2113 1-13/16" New

IKO Cam Follower Bearing CF12-1VUU CF121VUU New

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(LOT OF 3) TIMKEN TORRINGTON FNT-1528 BEARING NEW

No Name Taper Lock Bushing 1008-15 100815 New

NTN Tapered Ball Bearing 4T-31594PXI 4T31594PXI New

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NDH Insert Bearing LA100C 1" Bore New

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(LOT OF 2) TORRINGTON AS1528 ROLLER  BEARING NEW

Fafnir 7303W C1 Thrust Bearing 7303WC1 New

Whittet-Higgins Self Locking Nut NSH-07 NSH07 36069 New

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NEW NO NAME BALL BEARING 3110-159-1631 31101591631

Timken Locknut Washer TW124 Lot of 3 New

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Bower / BCA Bearing WPS 108-GRC WPS108GRC New

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NEW SKF SEALED BALL BEARING 6204

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SKF Self Aligning Ball Bearing 22308 CC/W33 22308CCW33 New

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RBC Cam Follower Bearing S48L S-48-L New

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PTI Flange Bearing 0HFK25 SB205-16 SB20516 SB205 16 NEW

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No Name Keyed Sprocket 40B13F 5/8" Bore New

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Ross 4-Way Solenoid Operated Valve 2776B3001Z 2776B3001 110/120V Coil New

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McGill Cam Follower Bearing CF 3 1/2 SB CF312SB 3-1/2" New

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Timken Tapered Roller Bearing Cup and Cone 388A 383A GB.722673-01054 New

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Applied Technology Adapter 16X2.688 16X2668 16 X 2.688 S16 2 11/16 2-11/16" New 

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Sealmaster Seal Master Insert Bearing SL-12 SL12 3/4" Bore New

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Corlett Turner Roller Bearing 1" ID 1 1/2" OD 2 1/2" L New

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Smith Cam Follower Bearing HR-3/4X HR 3/4 X HR34X New

Consolidated Single Row Ball Bearing 1603-2RS 16032RS 1603DC New

AMI UC207-23 Bearing UC20723 1-7/16" Bore New

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NEW FAFNIR BEARING 9111K