直接數(shù)字控制器的主要功能有以下幾點(diǎn):
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1.對(duì)第三層的數(shù)據(jù)采樣設(shè)備進(jìn)行周期性的數(shù)據(jù)采集;
2.對(duì)采集的數(shù)據(jù)進(jìn)行調(diào)整和處理(濾波、放大、轉(zhuǎn)換)
3.對(duì)現(xiàn)場(chǎng)采集的數(shù)據(jù)進(jìn)行分析,確定現(xiàn)場(chǎng)設(shè)備的運(yùn)行狀態(tài);
4.對(duì)現(xiàn)場(chǎng)設(shè)備運(yùn)行狀態(tài)進(jìn)行檢查對(duì)比,并對(duì)異常狀態(tài)進(jìn)行報(bào)警處理;
5.根據(jù)現(xiàn)場(chǎng)采集的數(shù)據(jù)執(zhí)行預(yù)定的控制算法,從而獲得控制數(shù)據(jù);
6.通過預(yù)定的控制程序完成各種控制功能,包括比例控制、比例加積分控制、比例加積分微分
控制以及其他的控制功能;
7.向第三層的數(shù)據(jù)控制和執(zhí)行設(shè)備輸出控制和執(zhí)行命令;
8.通過數(shù)據(jù)網(wǎng)關(guān)或網(wǎng)絡(luò)控制器連接層的設(shè)備,與各上級(jí)管理計(jì)算機(jī)進(jìn)行數(shù)據(jù)交換,同時(shí)發(fā)出請(qǐng)求和接收各種控制命令。
Hamlin 59135-030 Proximity Sensor 3W 120 VAC .25A
Turck Bi10-G30-AN6X Proximity Sensor 10-30VDC 200mA
U.R.D. Co. CTL-12-S56-10L U-RD CTL Sensor
Turck Bi10-G30-AZ3X Proximity Sensor 20-250V 500 mA
Efector FA3002-ANKG Proximity Switch 10-55 VDC 250mA
Turck BI1-G08-AN7X Proximity Sensor 10.30VDC 150mA
Turck Bi1.5-G08-AP6X Proximity Sensor 10-30VDC 150mA
Turck Bi1-G08K-AP6X Proximity Sensor 10-30VDC 150mA
Turck Bi15-G30-AZ3X-B1131 Proximity Sensor
Banner OSBFX OMNI-BEAM
Turck Ni5-G12-YO Proximity Sensor Din 19234
FM PK-8246 Non-Incendive Micro Switch 9-20VDC
Turck Bi2-G12-AN7X Proximity Sensor 10-30 VDC 150mA
Honeywell 923AA2XM-A7T-L Micro Switch Swiss 8921
Turck N12-G08-Y0 Proximity Sensor with Current-Change Output
Delaval Gems Sensors Division 28196 Flip-Pak 120V 5A
Omron TL-X5Y1 Proximity Sensor 120V
PROSOFT MVI46-DFNT
IC697PCM711
6DD1607-0AA0
NPSA-ZMTA-101AE-CE
1336F-BRF10-AA-EN
3BHT340092R1 CI590
51196655-100 ACX633
ProSoft MVI94-MCM
ProSoft MVI56-HART
ProSoft MVI56-HART
ProSoft MVI56E-MNET
ProSoft MVI69-MCM
ProSoft MVI69-MCM
ProSoft MVI56-DFCMR
ProSoft MVI56E-MNETR
ProSoft MVI56-ADM
ProSoft MVI46-GSC
ProSoft MVI56-MCMR
ProSoft MVI56-MCM
ProSoft MVI56-MCM
ProSoft MVI46-MCM
ProSoft MVI56-HART
Honeywell FYCD16E1-2 Proximity Sensor 8.5-20VDC
Paper Machine Componets PT-30-N-HA-S Pressure Transmitter
Efector 0G5086 Photoelectric Sensor 0GP-FPKG/V4A/US-100
Banner Q45BB6DLQ5 Photo Optic Sensor 10 to 30V DC 250mA Max
Turck NI 5-G12-AP6X-H1141 Proximity Switch Sensor 10-30VDC 200mA