1769-SDN
1769-SDN
1769-SDN
这样,用PLC实现模拟量控制是完全可能的。控制的单位值可小到212分之一的测量程值,多数也是足够的。
PLC进行模拟量控制,还有A/D、D/A组合在一起的单元,并可用PID或模糊控制算法实现控制,可得到很高的控制质量。
用PLC进行模拟量控制的好处是,在进行模拟量控制的同时,开关量也可控制。这个优点是别的控制器所不具备的,或控制的实现不如PLC方便。
当然,若纯为模拟量的系统,用PLC可能在性能价格比上不如用调节器。这也是应当看到的。
3.3用于运动控制
实际的物理量,除了开关量、模拟量,还有运动控制。如机床部件的位移,常以数字量表示。
运动控制,有效的办法是NC,即数字控制技术。这是50年代诞生于美国的基于计算机的控制技术。当今已很普及,并也很完善。目前,先进国家的金属切削机床,数控化的比率已超过40%~80%,有的甚至更高。
现货,现货,降降降,火火火,火火火……
现货,现货,降降降,火火火,火火火……
——————————————————————————————————————
◆ 企业名称:厦门泰尼电气有限公司
◆ 联系人: 小廖(女士)
◆ 电话:0592-6539066
◆ 传真:0592-6890859
◆ QQ:1490371370
诚信经营,质量为首,服务至上,厦门泰尼小廖竭诚为您服务!!!
———————————————————————————————————————
MDA SCIENTIFIC 872299-U SECONDARY FLOW MODULE
MDA SCIENTIFIC 872299-R SECONDARY FLOW MODULE
MDA SCIENTIFIC 872770-U SECONDARY FLOW MODULE
ATCOR HA-0478-04 MPU EPROM
KOKUSAI 9027646 I/O PORT CABLE, RIGHT, APOGEE
PARKER SVC508M10808-10 VALVE SINGLE VERTICAL 1 MAIN X1
ZEEV & SONS P0-MS HYDRANT VALVE,CS,3; PO-MS
ESI EDWARDS SYSTEMS TECH 130140 FCOM-485 MODULE,LSS FAS
DISCO MOGCN00148 TOYOX TOYOSPRING 25X33; PIPE SEALED VA
STS 04-710791-01 CHAIN CASSETTE DRIVE
DNS 2-9P-00058 TR1 ROTARY AXIS 200 ASSY
TEL CT2910-206476-13 Dev solution E3 Nozzle
ESD-ELECTRONICS CAN-ISA-200 ESD-ELECTRONICS CAN-ISA/200
AMAT 0050-30839 4 VALVE FINAL MANIFOLD LEFT SIDE
SILICON GRAPHIC GDM-4011P COLOR GRAPHIC 20 INCH MONITO
AMAT 0240-15381 KIT BLADES AND PADS
AMAT 21016401377 CABLE PAL UPGRADE KIT 50417504000 2 OF
AMAT 0100-09011-R PCB A/I MULTIPLEXER - Repair
AMAT 0100-09056-R PCB ASSY INTEL INTERFACE AMAT ETC
VERTEQ 1068395-11 PCB CPU ASSY
MKS 127AA-00001B-REFURB PRESSURE TRANSDUCER 1 TORR
MDA SCIENTIFIC 872107-1 ANALYZER MODULE
MATTSON 162-00001-00 HEATER, ASPEN II STRIPPER
SIGMA 55-0209 SIGMA COLOR 400 S CARD
AMAT 0020-01170 GAS DISTR 5 & 6" LINE & PLUG
AVIZA 908193-001 PCB, EXTENDED ANALOG I/O BOARD
VAT 205581 GATE VALVE
OPTO 22 106195 PCB, PAMUX B4 BRAIN BOARD 001788L
AMAT Mec H.D W/CD applictn H.D 40GB 0300-A0180
AMAT 0050-61739 WELDMENT, N2 MIXING
AMAT 0150-92637 CBL ASSY X29A.P4/X25B.SIGNAL
AMAT LINER, TOP, TICL4 TIN 0040-48030
ASML 06040-02 BLOCK NOZZLE MIRROR IMAGE (AD-PR DIZA -
AMAT 0150-94378 CFA X25C.P3/X2H.P1
ULVAC ZE07-9687-0 1031848 EM1919-663-01C GROUND SHIELD
AMAT 0050-30231 WELDMENT,INTERCONNECT,PROCESS ASP CHR.D
LAM 32-0005-001 CHAIN, DRIVE 1/10P, 10FT LG
AKRION 00006188-00 CYLINDER. LID ACTUATION TANK E200.
AMAT 3870-02528 VALVE MNL BALL 3-WAY 1FNPT SST
AMAT 0021-10666 BLOCK,GAS/WTR,CHAMBER LID,GIGA-FILL SAC
AMAT HTR2.5, STR4.8, SPEC, 1BP3 1410-00754
AMAT 0020-45842 SPACER VAC ELEVATOR
AMAT 1220-01017 XMTR 2-WIRE ORP 4-20MA-OUT
AMAT 0020-26457 BRACKET WATER RETURN FLOW SW-MODIFIED
AMAT 0226-97958 HOSE ASSY, CH C, SUPPLY TO CATHODE, PTF
AMAT 1220-01018 XMTR ISOL 2-WIRE PH 4-20MA 12-36VDC
KLA-TENCOR CORP 208-500117-1 PCB RS232 INTERFACE TYPE
MDA SCIENTIFIC R872090 MDA SCIENTIFIC ZELLWEGER ANALYTI
LAM RESEARCH 778-090791-001 TEMP CONTROLLER WVDS CAL990
LAM RESEARCH 853-034016-003 STRAP CA COAX TCP ASSY; 7FT
EDWARDS VACUUM INC DPI52S25-20 DIP-PROOFING TECHNOLOGIE
EDWARDS VACUUM INC DPI52S50-20 DIP-PROOFING TECHNOLOGIE
BROOKS BM11659 PCB; BM11659L02RB
AMAT GAS DISTRIBUTION PLATE, MTG 0020-33666
AMAT 3930-99001 GAUGE CONT.(EBEAM)