当前位置:汽车配件110网 >> 供\求\合作、代理、招聘信息中心 >> 供应 >>140CPU11303 |
详细内容:140CPU11303 对于用户来说,在编写用户程序或选择设备时,必须清楚下面介绍的三个阶段,即用户程序执行过程的原理。 PLC采用集中处理的方法,即对输入扫描信号、执行用户程序和输出刷新都采用集中分批处理的工作方式。 输入扫描 在这一阶段中,PLC以扫描方式读入所有输入端子上的输入信号,并将输入信号存入输入映像区,输入映像存储器被刷新。在程序执行阶段和输出刷新阶段中,输入映像存储器与外界隔离,其内容保持不变,直至下一个扫描周期的输入扫描阶段,才被重新读入的输入信号刷新。可见,PLC在执行程序和处理数据时,不直接使用现场当时的输入信号,而使用本次采样时输入到映像区中的数据。如果输入设备能使PLC输入端形成闭合回路,对应输入端编号的内部输入继电器内保存为“1”,即相当于继电器线圈导通。在程序执行过程中,该编号对应的触点动作;如果输入设备能使输入开路,则对应输入端编号的内部输入继电器内保存为“0”,即相当于继电器线圈没导通,在程序执行过程中,该编号对应的触点不动作。如果在PLC处于非输入扫描的阶段,PLC外的输入设备状态发生了变化,内部输入继电器也不会发生变化,要等到下一个输入扫描阶段才能根据此时的输入状态来刷新。所以,对于少于十几毫秒的输入信号,经常采集不到。 执行程序 在执行用户程序过程中,PLC按梯形图程序顺序自上而下、从左至右逐个扫描执行,即按助记符指令表的先后顺序执行。但遇到程序跳转指令,则根据跳转条件是否满足来决定程序跳转地址。程序执行过程中,PLC从输入映像区中取出输入变量的当前状态,然后进行由程序确定的逻辑运算或其他运算,根据程序指令将运算结果存入相应的内部继电器中,包括输出继电器、内部辅助继电器、定时器、计数器等。输出继电器的信号存放在输出映像区,即输出继电器与PLC外部的同编号的输出点对应。 在程序执行过程中,同一周期内,前面的逻辑结果影响后面的触点,即后执行的程序可能用到前面的最新中间运算结果;但同一周期内,后面的运算结果不影响前面的逻辑关系。该扫描周期内除输入继电器以外的所有内部继电器的最终状态(导通与否),将影响下一个扫描周期各触点的开与闭。 (3)输出刷新 程序执行阶段的运算结果被存入输出映像区,而不送到输出端口上。在输出刷新阶段,PLC将输出映像区中的输出变量送入输出锁存器,然后由锁存器通过输出模块产生本周期的控制输出。如果内部输出继电器的状态为“1”,则输出继电器触点闭合。全部输出设备的 。 Reliance Electric 3EB1 Encoder Isolation Buffer RELIANCE ELECTRIC 391023 CONTROL BOARD * IN A BOX* RELIANCE ELECTRIC 36HQ100-2-11/16 36HQ10021116 Reliance Electric 34C063-5422G7 C56H1590 115/208-230 1725rph .50hp 60hz 1PH RELIANCE ELECTRIC 3418-2WY 34182WY RELIANCE ELECTRIC 3418-2WN 34182WN RELIANCE ELECTRIC 333236 333236 RELIANCE ELECTRIC 32408 32408 RELIANCE ELECTRIC 3141-WX 3141WX RELIANCE ELECTRIC 3141-U 3141U RELIANCE ELECTRIC 3141-SB 3141SB RELIANCE ELECTRIC 3141-PL BOX OF 8 RELIANCE ELECTRIC 3141-PJ BRUSH (LOT OF 4 IN BOX ) RELIANCE ELECTRIC 3141-NQ 3141NQ RELIANCE ELECTRIC 3141-N 3141N RELIANCE ELECTRIC 3141-LM 3141LM Reliance Electric 3141-GW 3141GW Motor Brush - No Box Reliance Electric 3/4HP 208-230/460VAC 3-Phase Motor P56H7313GA Reliance Electric 3/4HP 208-230/460VAC 3-Phase Motor P56H7313GA RELIANCE ELECTRIC 3/4 HP MOTOR 1725 RPM *NEEDS SHANK* Reliance Electric 3/4 HP 3PH 56C Motor w/Morse 18GEDC 15:1 Speed Reducer Gearbox RELIANCE ELECTRIC 3/4 H.P. MOTOR P56X0357V , 1140 RPM , 208-230/460V , FR. FC56C RELIANCE ELECTRIC 2GU41001 DRIVE 1HP 460VAC 3PHASE 2.1 MAX AMP ***GOOD*** RELIANCE ELECTRIC 2GU41001 AC VS DRIVE GP-2000 460V 2.5A 50/60HZ 3PH ***XLNT*** RELIANCE ELECTRIC 2CA3001 2CA3001 RELIANCE ELECTRIC 2CA3001 ADAPTOR CABLE * IN A BOX* RELIANCE ELECTRIC 25CC1 PC BOARD 108053-071X 415710-13A RELIANCE ELECTRIC 2517-7/8 251778 RELIANCE ELECTRIC 251320PKPK7JCL 251320PKPK7JCL RELIANCE ELECTRIC 24V, FAN ASSEMBLY 615196-2R * * RELIANCE ELECTRIC 23C19 23C19 RELIANCE ELECTRIC 2356197A 2356197A RELIANCE ELECTRIC 230/460V 2.8/1.4A 1725RPM P56X1531H RELIANCE ELECTRIC 211L9 #18667 COIL RELIANCE ELECTRIC 208-230/460V 1/4HP 1140RPM DUTY MASTER AC MOTOR P48H0310P RELIANCE ELECTRIC 2006K-7A 2006K7A RELIANCE ELECTRIC 2 POLE CIRCUIT BREAKER, 705385-62T RELIANCE ELECTRIC 1LS2004 1LS2004 Reliance Electric 1Hp(+-) DC Motor ID# V76Q1523M-PG, 1725 rpm, relay,starter RELIANCE ELECTRIC 1C12000DA A-C V-S DRIVE OLD STOCK RELIANCE ELECTRIC 1AC2102U 2.9 kva 2hp 200/230v 15.5a 1ph 9.2a 3ph AC VS DRIVE RELIANCE ELECTRIC 1750RPM SIZE RATIO 56/150-5 TIGEAR RELIALUBE REDUCER 7916110BW RELIANCE ELECTRIC 1725RPM 1/4HP POWER MATCHED DC MOTOR T56H1019AB-SH / E80056C Reliance Electric 16 Slot Rack, 57C331, , WARRANTY RELIANCE ELECTRIC 15CC2 15CC2 RELIANCE ELECTRIC 15A 12V 24 HOUR PROGRAMMABLE TIME SWITCH 202 NNB RELIANCE ELECTRIC 15750-592 15750592 RELIANCE ELECTRIC 15750-588 15750588 RELIANCE ELECTRIC 15750-586 15750586 RELIANCE ELECTRIC 14C-620 14C620 RELIANCE ELECTRIC 14C-620 14C620 RELIANCE ELECTRIC 14C-277 14C277 RELIANCE ELECTRIC 14C-241 14C241 RELIANCE ELECTRIC 14C229 RELIANCE ELECTRIC 14C-228 14C228 RELIANCE ELECTRIC 14C-226 14C226 RELIANCE ELECTRIC 14C223 VOLTAGE/TACHOMETER FOLLOWER KIT, NIB RELIANCE ELECTRIC 14C-223 14C223 RELIANCE ELECTRIC 14C-223 14C223 RELIANCE ELECTRIC 14C223 VS DRIVES VOLTAGE/TACH FOLLOWER KIT 14C223 RELIANCE ELECTRIC 14C223 RELIANCE ELECTRIC 14C-222 14C222 Reliance Electric 14C-222 Interface Kit ! ! Reliance Electric 14C220 PC Board Adapter Kit ! ! Reliance Electric 14C-216 Dynamic Braking Kit 1/2-1.5 ! ! RELIANCE ELECTRIC 14C-212 14C212 RELIANCE ELECTRIC 14C212 2 POLE CIRCUIT BREAKER RELIANCE ELECTRIC 14C211 2 POLE CIRCUIT BREAKER RELIANCE ELECTRIC 14C21 MINIPAK PLUS 1.5 HP, 230 VAC ( ) RELIANCE ELECTRIC 14C201 Operator Control Station RELIANCE ELECTRIC 14C200 BLANK COVER PLATE * IN BOX* Reliance Electric 14C106, FlexPak Plus DC Drive, 115VAC, 1PH, 10.5A, 0.75HP RELIANCE ELECTRIC 1-48674-B VOLTAGE SENSITIVE RELAY MODULE 148674B RELIANCE ELECTRIC 129P06 129P06 RELIANCE ELECTRIC 129P06 129P06 RELIANCE ELECTRIC 1297500 1297500 Reliance Electric 128K Common Memory 57C423 (F6) Reliance Electric 1-2 HP 1725 RPM 208-230/460VAC 56C Frame Duty Master Motor RELIANCE ELECTRIC 115V-AC NUMERIC DISPLAY D469159 RELIANCE ELECTRIC 115VAC HIGH OUTPUT MODULE 0-57403-F *REFURBISHED* Reliance Electric 115V AC/DC Low Output Module, 57C402, , WARRANTY RELIANCE ELECTRIC 115V AC/DC L/O DIGITAL CONTROL SYSTEM CARD 57402-C RELIANCE ELECTRIC 115V AC INPUT COUPLING 57456-1 RELIANCE ELECTRIC 115 V AC OUTPUT MODULE 0-57403-E 0 57403 E 57403-E 57403E RELIANCE ELECTRIC 112151 112151 RELIANCE ELECTRIC 108-230/460V .5HP 1725RPM AC MOTOR P56H5069 RELIANCE ELECTRIC 108073-003T 108073003T RELIANCE ELECTRIC 107072-009W 107072009W RELIANCE ELECTRIC 1/4 HP AC MOTOR, 1725 RPM, 208-230/460-480 VOLT, 3 PHASE( ) RELIANCE ELECTRIC 1/3HP AC MOTOR #P48H2301P 230/460VAC 60HZ. 1725RPM Reliance Electric 1/2HP FB56C 208-230/460v 3PH 1725 RPM RELIANCE ELECTRIC 1/2HP DUTY MASTER AC MOTOR P56H1020S RELIANCE ELECTRIC 1/2HP AC MOTOR # 208-230/460VAC 60HZ. 1725 RPM RELIANCE ELECTRIC 1.5HP MOTOR /HUB CITY GEAR MOTOR FR56C PH:3 #518230 RELIANCE ELECTRIC 1.5 HP S2000 DUTY MASTER AC MOTOR , RPM 1730, FR FC145T, RELIANCE ELECTRIC 096066 096066 RELIANCE ELECTRIC 096066 096066 RELIANCE ELECTRIC 07901938AY 07901938AY Reliance Electric 078089006R DV/DT Resistor Assembly 0-78089-006R RELIANCE ELECTRIC 0-750 RPM ELECTRIC SPEED INDICATOR 412723-31D RELIANCE ELECTRIC 0-66042-55R 06604255R RELIANCE ELECTRIC 0-60066 060066 RELIANCE ELECTRIC 0-60035 060035 RELIANCE ELECTRIC 0-600 DC VOLTS VOLTAGE METER PANEL 612234-1RJ RELIANCE ELECTRIC 0-600 B.P.M ELECTRIC SPEED INDICATOR 63282 RELIANCE ELECTRIC 0-58710-1 0587101 Reliance Electric 0-58710-1 Circuit:ITB CARD 0587101 Reliance Electric 0-57418-E A/B Interface Module 57C418 RELIANCE ELECTRIC 0-57418-E 57418 A/B INTERFACE MODULE RELIANCE ELECTRIC 0-57418-A 57418 A/B INTERFACE MODULE RELIANCE ELECTRIC 0-57413-1 * * Reliance Electric 0-57400-A Input Module O-57400-A - Reliance Electric 0-57400 57400 115V AC/DC Input Board Reliance Electric 0-57301-1 0573011 Battery Backup Board - Reliance Electric 0-57008 Switch Receiver 057008 RELIANCE ELECTRIC 0-57006 057006 Reliance Electric 057006 Industrial Control System RELIANCE ELECTRIC 0-57006 ADAPTER KIT FOR TEST METER 057006, 705354-75A RELIANCE ELECTRIC 0-57006 ADAPTER KIT FOR TEST METER 057006 14C225 RELIANCE ELECTRIC 0-57004 PRINTED CIRCUIT TACH. FEEDBACK KIT ***XLNT*** Reliance Electric 0-57003 RELIANCE ELECTRIC 0-57002-E 057002E RELIANCE ELECTRIC 0-57002 057002 RELIANCE ELECTRIC 0-57002 SPEED PRESET INTERFACE BOARD 057002 Reliance Electric 0-57002 Pre-set Speed Interface Board Reliance Electric 0-57002 Drive Card PCB Preset Speed ! WOW ! Reliance Electric 0-57002 705358-50B PC Board Preset Speed Interface RELIANCE ELECTRIC 0-5700 05700 Reliance Electric 0-56313-1 controller inverter 0563131 RELIANCE ELECTRIC 0-56302 056302 RELIANCE ELECTRIC 0-56302 056302 Reliance Electric 0-55350-10-B 802289-51B Circuit Board Assembly 99739-618 9748 RELIANCE ELECTRIC 0-55325-9 RELIANCE ELECTRIC 0-55320 055320 Reliance Electric 0-55320 Printed Circuit DV/DT Card 460V Minpak Control Board Reliance Electric 0-55320 Capacitor Circuit Board-Printed DV/DT Card 460V NIB RELIANCE ELECTRIC 0-55310 PC BOARD DV/DT PRTD PC BOARD 055310 Reliance Electric 0-55310 DV/DT CARD Board REPAIRED RELIANCE ELECTRIC 0-55307-1E POWER SUPPLY BOARD 0553071E Reliance Electric 0-55304 PC Board Start/Stop 055304 RELIANCE ELECTRIC 0-54394-6 0543946 RELIANCE ELECTRIC 0-54394-49B 05439449B Reliance Electric 0-54394-10 Circuit Board PCB Base Driver Card Free Shipping! RELIANCE ELECTRIC 0-54391 054391 RELIANCE ELECTRIC 0-54390 054390
|
|