PTAI216 BACHMANNPTAI216 BACHMANN
*處理單元(CPU)是PLC的控制中樞。它按照PLC系統(tǒng)程序賦予的功能接收并存儲(chǔ)從編程器鍵入的用戶程序和數(shù)據(jù)；檢查電源、存儲(chǔ)器、I/O以及警戒定時(shí)器的狀態(tài)，并能診斷用戶程序中的語法錯(cuò)誤。當(dāng)PLC投入運(yùn)行時(shí)，首先它以掃描的方式接收現(xiàn)場(chǎng)各輸入裝置的狀態(tài)和數(shù)據(jù)，并分別存入I/O映象區(qū)，然后從用戶程序存儲(chǔ)器中逐條讀取用戶程序，經(jīng)過命令解釋后按指令的規(guī)定執(zhí)行邏輯或算數(shù)運(yùn)算的結(jié)果送入I/O映象區(qū)或數(shù)據(jù)寄存器內(nèi)。等所有的用戶程序執(zhí)行完畢之后，zui后將I/O映象區(qū)的各輸出狀態(tài)或輸出寄存器內(nèi)的數(shù)據(jù)傳送到相應(yīng)的輸出裝置，如此循環(huán)運(yùn)行，直到停止運(yùn)行。
為了進(jìn)一步提高PLC的可*性，近年來對(duì)大型PLC還采用雙CPU構(gòu)成冗余系統(tǒng)，或采用三CPU的表決式系統(tǒng)。這樣，即使某個(gè)CPU出現(xiàn)故障，整個(gè)系統(tǒng)仍能正常運(yùn)行。
鄭娟萍
廈門仲鑫航自動(dòng)化設(shè)備有限公司
PLC的工作原理
一. 掃描技術(shù)
當(dāng)PLC投入運(yùn)行后，其工作過程一般分為三個(gè)階段，即輸入采樣、用戶程序執(zhí)行和輸出刷新三個(gè)階段。完成上述三個(gè)階段稱作一個(gè)掃描周期。在整個(gè)運(yùn)行期間，PLC的CPU以一定的掃描速度重復(fù)執(zhí)行上述三個(gè)階段。
(一) 輸入采樣階段
在輸入采樣階段，PLC以掃描方式依次地讀入所有輸入狀態(tài)和數(shù)據(jù)，并將它們存入I/O映象區(qū)中的相應(yīng)得單元內(nèi)。輸入采樣結(jié)束后，轉(zhuǎn)入用戶程序執(zhí)行和輸出刷新階段。在這兩個(gè)階段中，即使輸入狀態(tài)和數(shù)據(jù)發(fā)生變化，I/O映象區(qū)中的相應(yīng)單元的狀態(tài)和數(shù)據(jù)也不會(huì)改變。因此，如果輸入是脈沖信號(hào)，則該脈沖信號(hào)的寬度必須大于一個(gè)掃描周期，才能保證在任何情況下，該輸入均能被讀入。
DEMAG Dematic DC LDBV 380Z045D00 LDBV 380 Z 045 D 00
INDRAMAT DSS02.2-W100-BE12-01-FW Frequenzumrichter
INDRAMAT DDS02.2-W100-BE76-01-FW Frequenzumrichter
INDRAMAT DDS02.2-W100-BE31-01-FW Frequenzumrichter
Indramat DDS02.2-W100-BE12-01-FW
INDRAMAT TDM1.2-050-300-W1-000 TDM 1.2-050-300-W1-000 -used-
INDRAMAT NAM 1.2-15 NAM1.2-15 Netzanpassungsmodul
Indramat TDM 3.2-020-300-W0 TDM3.2-020-300-W0
INDRAMAT TVD 1.3-15-03 TVD1.3-15-03 Power Supply Versorgungsmodul
INDRAMAT TDM 1.2-050-300-W1-0 TDM1.2-050-300-W1-0 Frequenzumrichter
SEW EURODRIVE MOVITRAC 3007-403-4 SachNr. 8256519 - used -
SEW Eurodrive MDx60A0110-5A3-4-00 S-Nr. 08226857 + MDX61B0110-5A3-4-0T -used-
SEW MOVIDYN MP 5011 AD 00 MP5011AD00
Indramat HDS04.2-W200N-HS 34-01-FW
SIEMENS SIMOVERT P 6SE1222-2AB02 6SE1 222-2AB02 D400/32 M6REFQ
SIEMENS SIMOVERT P 6SE2108-3AA21 6SE2 108-3AA21
Siemens Simovert 6SE2133-3AA01 6SE2 133-3AA01
Siemens Simoreg 6RA2125-6DV62-0 6RA2 125-6DV62-0
SEW Movitrac 3007-403-4-00 -unused/OVP-
SEW MOVITRAC 1006-403-4-00
Danfoss MCD3000 Softstarter MCD3022-T7-B21-CV4 - used -
INDRAMAT HDS03.2-W100N-HS34-01-FW DSS02.1M DEA02.1M DLF01.1M CLC-D02.3M-FW HSM01
Siemens SED2.45/32B 6SE6436-2BD34-5EA0 6SE6 436-2BD34-5EA0
INDRAMAT HDS03.2-W100N-HS34-01-FW DSS 2.1 DLF 1.1 DEA 4.2
SIEMENS MICROMASTER 420 6SE6420-2AD22-2BA1 6SE6 420-2AD22-2BA1 2.20 kW
Getriebebau NORD SK 700E-112-340-A 11kW inkl. Bedienger?t SK TU1-PAR
DANFOSS Frequenzumrichter VLT2803 VLT 2803 0.9 kVA VTL2803PD2B20STR0DBF00A00C0
DANFOSS Frequenzumrichter VLT5006 VLT 5006 7.6 kVA VTL5006PT5B20STR3DLF00A00C0
Siemens Micromaster 440 6SE6440-2UD15-5AA1 & EMC-Filter Vers:A03/2.06 - used -
QUICK Antriebstechnik DV-505-750RP Frequenzumrichter
SCHAFFNER Spannungsversorgungsfilter FN351H-80-34 -3X 520VAC-
SEW EURODRIVE EMV-Modul EF 014-503 SachNr.: 8263841 -used-
SEW EURODRIVE MC07A008-5A3-4-00 8272484
SEW EURODRIVE MOVITRAC MC07A055-5A3-4-00 08272549 Umrichter
SEW EURODRIVE MOVIDYN MAS51A010-503-50 826256X Umrichter
SEW EURODRIVE MOVIDRIVE 31C015-503-4-00 8263337 Umrichter ohne Bedienteildeckel
SEW EURODRIVE MOVIDRIVE 31C015-503-4-00 8263337 Umrichter
Getriebebau NORD NORDAC Vector SK 7500/3 CT 11.30 kVA
SEW EURODRIVE MOVIDRIVE MDV60A0075-5A3-4-00 8264872 MDX60A0075-5A3-4-00 8226849
St?ber Frequenzumrichter FCM 1028
reis 1410 Id.Nr.: 1729335 10A/20A Rev.E2 Servodrive
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SCHAFFNER Frequenzumrichter, Netzfilter FS5787-16-29
MITSUBISHI FR-ABR-H0.75K Bremswiderstand
MITSUBISHI FR-E540-0.75K-EC FR-E5NF-H0,75K -used (obere Frontabdeckung fehlt)-
MITSUBISHI FR-E540-0.75K-EC FR-E5NF-H0,75K -used-
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Siemens Micromaster Vector 6SE3221-0DC40 6SE3 221-0DC40 -used-
Siemens Micromaster 6SE3221-0DC40 6SE3 221-0DC40 -used/Halterungs?se gebrochen-
SEW BW 147-T Bremswiderstand -unused-_
Siemens 6SE6440-2UC21-5BA1 6SE6 440-2UC21-5BA1
MITSUBISHI MR-J2HBUS5M-A Servokabel
Siemens Simoreg 6RA8 222-1CA0-0 6RA8222-1CA0-0 Card
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SEW Movitrac 31C005-503-4-00 inkl. EMV Modul EF 014-503 -wie neu-
PARKER SSD Drives 6053/PROF/00 + 2x 6511-RS232-00-G
BERGER LAHR D148.13 D 148.13
ESR Pollmeier MidiDrive BN6667.2380-N2-K5-Z1-P1
ESR Pollmeier MidiDrive A BN6682.3879-K5-Z1
ESR Pollmeier MidiDrive BN6617.1542.1285
EUROTHERM 7100A 7100 A Frequenzumrichter
NORDAC COMPACT SK 1500/3 NC SK1500/3NC
MITSUBISHI MR-JCCBL2M-L Encoderkabel
MITSUBISHI MR-JCCBL5M-L Encoderkabel
ESR Pollmeier MidiDrive D BN6742.3310 B1-R1-A1-SK
SEW MOVITRAC 3004-403-1-00 SachNr. 8256357 6,6 kVA
KEB COMBIVERT 15.56.20A-3389 Frequenzumrichter 16 kVA
Siemens MIDIMASTER Vector 6SE3222-3CG40 6SE3 222-3CG40
HITACHI HFC-VWS 11 LF3 Frequenzumrichter 7,5 kW
SEW MOVITRAC 3011-403-1-00 SachNr. 825639X 16 kVA
Siemens Motorsteuerger?t 3RW2235-0DB15 3RW2 235-0DB15
Lenze 765 E3 b Frequenzumrichter
Danfoss VLT5004 VLT5004PT2B20STR3DLF00A00 4,4 kVA
emecanique ATV452075N Altivar 5 Serie 45 2
Siemens Simoreg 6RA2431-6GS22-0 6RA2 431-6GS22-0
Siemens Simoreg 6SE1210-2AB00 6SE1 210-2AB00
Loher Dynavert 2T2A-03400-007 16 kVA Frequenzumrichter
Loher Dynavert 2T2A-03400-004 8,7 kVA Frequenzumrichter
SIEMENS Simoreg 6RA7025-6DV62-0-Z 6RA7 025-6DV62-0-Z
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COOPER Tools TM12 960900 Steuerung
DGD GARDNER DENVER Controller-C TFT T L2 F 960734-F
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emecanique Altivar 28 ATV28HU09M2 ATV2 8HU09M2
NORDAC COMPACT SK1100/2CV SK1100 Frequenzumrichter1100W
SM Sieb & Meyer Type M1 26.44.0007 Servo Logikkarte
SM Sieb & Meyer Type M2 26.44.0007 Servo Logikkarte
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SIEMENS SIMODRIVE 6SC6130-0FE01 6SC6 130-0FE01
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ABB MS450 MS 450 1SA M45 0000 R1004 Motorschutzschalter
SIEMENS SIMODRIVE 6SC6100-0GA00 6SC6 100-0GA00
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BERGER LAHR Karte D191 D 191 RS.05
ifm IE5312 IEK3002BBPKG/US
SEW Eurodrive EMV-Modul EF030-503 -unused/OVP-
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SEW EMV-Modul EF075-503
ALSTOM Microverter D 1.8 /380-2 029 143704
NORDAC COMPACT SK370/2CV SK370 Frequenzumrichter 370W
SIEMENS SIMOREG E150/15 6RA2113-6BK26-0 6RA2 113-6BK26-0 -unbenutzt/OVP-
INDRAMAT CZ 1.2-01-7 CZ1.2-01-7 CZ1-2-01-7 CZ12017
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FANUC VELOCITY A06B-6050-H104 Control Unit A06B6050H104
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Powerboard AEG Frequenzumrichter T56030155045
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BLEMEO Frequenzumrichter 11DE6A200
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