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(1)继电器逻辑
为适应电气控制的需要,PLC为用户提供继电器逻辑,用逻辑与或非等逻辑运算来处理各种继电器的连接。PLC内部有储单元有“1”和“0”两种状态,对应于“0N”和“0FF”两种状态。因此PLC中所说的继电器是一种逻辑概念的,而不是真正的继电器,有时称为“软继电器”。这些“软继电器”与通常的继电器相比有以下特点:
①体积小、功耗低
②无触点、速度快、寿命长
③有无数个触点,使用中不必考虑接点的容量
PLC一般为用户提供以下几种继电器(以FX2N系列PLC为例):
输入继电器(X):把现场信号输入PLC,同时提供无限多个常开、常闭触点供用户编程使用。在程序中只有触点没有线圈,信号由外部信号驱动。编号采用八进制,分别为X000—X007,X010-X017等。
输出继电器(Y):具备一对物理接点,可以串接在负载回路中,对应物理元件有继电器、晶闸管和晶体管。外部信号不能直接驱动,只能在程序中用指令驱动。编号采用八进制,分别为Y000—Y007,Y010-Y017等。
NEC FACTORY COMPUTERFC-9801B MODEL 2 +HDD+NEC-16T PC-9801-92,PIO-9032B-SB[2EA]
NEC FACTORY COMPUTERFC-9801B MODEL 2 +HDD + NEC-16T PC-9801-92,PIO-9032B-SB
ALLEN BRADLEY DIGITAL SERVO CONTROL1394C-SJT22-D
KLA INSTRUMENTS ,710-650070-20 E0,FAB 073-650069-00B0
NEC PC-9821 As2 COMPUTER PC-9821AS2/U2
BEG MINI-ATX MANAO03
NEW GE MULTILIN SR 469-P1-HI-A20-T-H SR469
ALLEN BRADLEY PLC-3/10 1775-A3, 1775-P3,1775-SR5, 1775-MSD,1755-L4,1775-GA
NEC FACTORY COMPUTOR 32BIT CPU UNIT FC-9801B
SIEMENS 3 1FT6102-1AC71-3EH1
REXROTH INDRAMAT MHD112C-024-PG0-BN
ALLEN BRADLEY 1394C-SJT10-D SER.C,V1.053
ALLEN BRADLEY 1394C-SJT10-D SER.D,
PANASONIC PERSONAL M550,CV-M550HEAS
PRO-FACE COMPUTER PS3700A-T41-ASU-P41,
OMRON PLC PS000 NM010 UV-250 C-820A M2010 CS010 IP000
ABB TRANSMIT, SACO 16D3-AA,RS,811 163-AA,SPA-ZC
KLA CORNERTURN 3,710-655651,FAB 073-655650-00
SUB ALIGNMENT VME I/F COGNEX8200 NIKON 4S018-785-A VME-I/F-X4
KLA INSTRUMENTS Y-INTERPOLATOR C,PH3,710-658172-20 REV JO,710-658172-00
MECS CS-1000A UTW2230LHG
VERTEQ 1600.NSC,R/DCONTROLLER 1071233-503R & 1600-55A
GASONICS 16025-02 DC
GASONICS 16025-02 REV:A,DC
ORBOTECH 0382396B CPU 3.20GHz
NEC PC-9801UV PERSONAL COMPUTER PC-9801UV11
SIEMENS,KUKA KRC32 CONTORLLER,DIN-41752,6FR2020,F13B,4691B0,331106,H43781F0
KLA INSTRUMENTS Y-INTERPOLATOR 2 BOARD,710-658066-20 A0,FAB073-655007-00
SIEMENS SIMODRIVE 6SN1145-1AA01-0AA1,SINUMETIK 840D NCU-BOX6FC5247-0AA00-0AA2
KLA CORNERTURN 3,710-655651-20,FAB 073-655650-00
ALLEN BRADLEY PANELVIEW 1400E 2711E-T14C6
NEC FC98-NX COMPUTERFC-24V SB2Z NO
KUBOTEK OPTICS OPT55G-[5X4K]-E
YASKAWA ELECTRIC 200V SGDH-1AAEY376 11KW
KLA INSTRUMENTS 8IBBOARD,710-653016-20,FAB 073-653015
FANUC HANDY FILE A13B-0159-B101
MOEHWALD EMI 21 EMI21-0175/04/05-MVE,
NEC FACTORY COMPUTERFC-9801
UQM TECHNOLOGIES 75KW,RPM:8000,SPM218-114-3-75,PART:25935
YASKAWA XU-CN0111
NEC PERSONAL COMPUTER PC-9801BX3/U2
COUTH MC2000T T1EI 12217,IKOR V02.33
INDRAMAT CLM01.3-X-0-4-0-FW
KLA INSTRUMENTSX ,710-658177-20,FAB 073-658176-00A0
KLA INSTRUMENTS DD BOARD,710-650044-20 REV C4,FAB 073-650043-00 B0
KLA ALIGNMENT PROCESSOR [AP1] PHASE 3 BOARD,710-658036-20,FAB 073-658035-00
KLA INSTRUMENTS BOARD,710-659724-00 REV A0,FAB073-659724-00A0
KLA MASS MEMORY 2 PH3 BOARD,710-658051-20 140CPS11420 140CPS11420