廈門市泰尼電器有限公司
主營產(chǎn)品: AB模塊PLC |
廈門市泰尼電器有限公司
主營產(chǎn)品: AB模塊PLC |
參考價 | 面議 |
PLC控制和DCS控制系統(tǒng)不是一個邏輯層次上的概念,從名稱上就能看出:PLC是以功能命名,DCS是以體系結(jié)構(gòu)命名。從原理上看 PLC就可以組成DCS。當(dāng)然兩者性能差異還是存在的,要具體看產(chǎn)品和需要。從應(yīng)用角度來說,簡單地以 PLC,DCS來區(qū)分,往往會走人誤區(qū)。
DCS控制系統(tǒng)與PLC控制區(qū)別: DCS是一種“分散式控制系統(tǒng)",而 PLC(可編程控制器)只是一種控制“裝置",兩者是“系統(tǒng)"與“裝置"的區(qū)別。系統(tǒng)可以實(shí)現(xiàn)任何裝置的功能與協(xié)調(diào),PLC裝置只實(shí)現(xiàn)本單元所具備的功能。
DCS網(wǎng)絡(luò)是整個系統(tǒng)的中樞神經(jīng),DCS系統(tǒng)通常采用的標(biāo)準(zhǔn)協(xié)議 TCP/IP。它是安全可靠雙冗余的高速通訊網(wǎng)絡(luò),系統(tǒng)的拓展性與開放性更好.而 PLC因?yàn)榛旧隙紴閱蝹€小系統(tǒng)工作,在與別的PLC或上位機(jī)進(jìn)行通訊時,所采用的網(wǎng)絡(luò)形式基本都是單網(wǎng)結(jié)構(gòu),網(wǎng)絡(luò)協(xié)議也經(jīng)常與標(biāo)準(zhǔn)不符。在網(wǎng)絡(luò)安全_匕 PLC沒有很好的保護(hù)措施。
1746-NI8--1746-NI8
--
:張亮(工程師) 專線:
24小時移動專線: 【】
1336S-B030-AA-E?N ALLEN BRADLEY DRIVES REMANUFACTURED
MAC090B-0-PD-4-?C/110-A-2/WI520?LV/S018 INDRAMAT SERVO MOTORS REMANUFACTURED
1FT6086-1AF71-4?EH1 SIEMENS SERVO MOTORS REMANUFACTURED
1D15H425-E0 BALDOR DRIVES REMANUFACTURED
2AD100B-B050B4-?AS03-A2N1 INDRAMAT SERVO MOTORS REMANUFACTURED
TDM1.2-100/300W?1-115-230 INDRAMAT DRIVES REMANUFACTURED
TDM1.2-100-300-?W1 INDRAMAT DRIVES REMANUFACTURED
2AD100D-B050B4-?AS03-D2N1 INDRAMAT SERVO MOTORS REMANUFACTURED
MAC071C-0-NS-4-?C/095-A-0/WI518?LV INDRAMAT SERVO MOTORS REMANUFACTURED
USASEM-13YR11 YASKAWA SERVO MOTORS REMANUFACTURED
1326AB-C3E-11-A?7-C5 ALLEN BRADLEY SERVO MOTORS REMANUFACTURED
TVD1.2-15-03 INDRAMAT POWER SUPPLY REMANUFACTURED
MAC112D-0-FD-1-?B/130-A-1/I1250?/S05 INDRAMAT SERVO MOTORS REMANUFACTURED
42PKHX CUTLER HAMMER MONITORS CRT REMANUFACTURED
FPS2175 MODICON PLC MODULES REMANUFACTURED
J540 MODICON PLC MODULES REMANUFACTURED
A06B-0148-B188#?7075 FANUC SERVO MOTORS REMANUFACTURED
A06B-0148-B188#?0075 FANUC SERVO MOTORS REMANUFACTURED
SCHESLL570049 SAET CIRCUIT BREAKERS AS-IS
HDS03.2-W100N-H?S12-01-F INDRAMAT DRIVES REMANUFACTURED
A06B-0614-B031#?0100 FANUC DC SERVO MOTORS REMANUFACTURED
R3S33T-105B-24-?PR ACTUATOR IND DEVICES INSTRUMENTATION
AS-884A-111 MODICON PLC MODULES REMANUFACTURED
MAC112D-0-HD-3-?C/130-A-1//S05 INDRAMAT SERVO MOTORS REMANUFACTURED
MAC112D-2-D-2-B?/130-A-0/S05 INDRAMAT SERVO MOTORS REMANUFACTURED
A06B-6088-H230#?H500 FANUC DRIVES REMANUFACTURED
MOT202/AS-BMOT-?202 MODICON PLC MODULES
58-46-929 ATLANTA GEARBOX
3408104XXX MARPOSS GAGING REMANUFACTURED