T8311

T8311

向著某一天終于要達(dá)到的那個(gè)*目標(biāo)邁步還不夠，還要把每一步驟看成目標(biāo)，使它作為步驟而起作用。——歌德，德國(guó)詩(shī)人

：祖巧麗

：

在機(jī)床數(shù)控系統(tǒng)中，電氣設(shè)備的控制占有重要的地位。目前，一般采用可編程控制器（PLC）進(jìn)行機(jī)床電氣控制。PLC可靠性高，使用方便，對(duì)于復(fù)雜的，控制點(diǎn)數(shù)較多的應(yīng)用場(chǎng)合，可以在PLC基本單元外加上一定數(shù)目的擴(kuò)展單元，實(shí)現(xiàn)復(fù)雜的電氣控制功能。在數(shù)控機(jī)床上。如果采用PLC進(jìn)行電氣控制，必需在PLC與NC 間建立電氣，否則，NC程序中的MST指令反映不到PLC中，PLC也就不可能做出相應(yīng)的動(dòng)作。目前市場(chǎng)上出售的PLC一般都具有通訊功能，可以利用這種功能在PLC與NC之間建立。由于PLC的通訊方式為串行通訊，通訊速度比較低，對(duì)于數(shù)控機(jī)床的某些實(shí)時(shí)性要求很強(qiáng)的信號(hào)如急停，超程等。就難以勝任一必需采取其它措施滿足這些特殊需要，但這又增加了系統(tǒng)的復(fù)雜程度。為了提高速度，降低戚本。在數(shù)控系統(tǒng)中t可以采用開關(guān)量I/O板加外接繼電器，配臺(tái)主機(jī)的軟件對(duì)電氣開關(guān)進(jìn)行控制。但此方案周NC主機(jī)要直接參與電氣控制邏輯的運(yùn)算過程。占用了主機(jī)的部分工作時(shí)間，增加了軟件的復(fù)雜程度。更重要的是。把過多的功能集中到主機(jī)使主機(jī)-發(fā)生故障的風(fēng)險(xiǎn)加大 出于對(duì)實(shí)時(shí)性和可靠性的考慮。作者在研制五軸聯(lián)動(dòng)數(shù)控系統(tǒng)的過程中。設(shè)計(jì)了一種嵌入式PLC.在保證實(shí)時(shí)性的同時(shí)。使故障風(fēng)險(xiǎn)相對(duì)分散。

SQUARE D .25-2.5PSI PRESSURE SWITCH CLASS-9012 AMW-1 105216
 
SQUARE D K3E2166D CLASS 9003 32A 660V CONTACT BLOCK, NNB
 
SQUARE D 600V 175A 2 POLE POWER DISTRIBUTION BLOCK 9080 LBC262104
 
SQUARE D 3 POLE TRAILER FUSE BLOCK 40567-016-51
 
AEG SQUARE D POWER MODULE 52914-036-50 17A8
 
SQUARE D ILLUMINATED RED PUSHBUTTON LOT OF 2 9001 TP-35 SER H
 
SQUARE D CLASS 8910 600VAC 40A CONTACTOR DPA33S44 SER. A
 
SQUARE-D * LIMIT SWITCH * TUB 1
 
SQUARE D 9001KS25K2 KEY OPERATED SELECTOR SWITCH, NNB
 
SQUARE D STARTER NEMA SIZE 00 SER C 8536
 
SQUARE D 600VAC 400A 3-POLE CIRCUIT BREAKER LAL3640036M1021 *CHIPPED PLASTIC*
 
SQUARE D OVERLOAD RELAY THERMAL UNIT B1.67 LOT OF 4
 
SQUARE D 9002 AW-2 FOOT SWITCH
 
SQUARE D SY/MAX PARALLEL DIGITAL DRIVER MODULE 8030 EQ5138-G1
 
SQUARE D 9070 SK5271S SER B TRANSFORMER DISCONNECT, 500 VA 230/460/115 V
 
SQUARE D DC WELDER MICRO BOARD 8997 EQ-5210 SMB-10 SER. A REV. 2.11
 
SQUARE D 2 POLE 90AMP 120/240VAC CIRCUIT BREAKER LM-4683
 
SQUARE D THERMAL OVERELOAD RELAY BO.63 LOT OF 4
 
SQUARE D 400A 2-POLE CIRCUIT BREAKER LAL2640036MV105?2
 
SQUARE D .150KVA 55°C CONTROL TRANSFORMER 9070 K150D1 SER-A
 
SQUARE D HF THERMAL OVERLOAD RELAY HEATER ELEMENT B4.15 NIB, LOT OF 5
 
SQUARE D 1HP VARIABLE FREQUENCY AC DRIVE ATV58NU18N4KU
 
SQUARE D 60HZ 3000VA TRANSFORMER DISCONNECT SK5271X FORM G13 SER. A
 
SQUARE D 600V 400A 3 POLE CIRCUIT BREAKER LA36400 CHIPPED PIECE
 
SQUARE D 300T3HNV SORGEL INSULATED TRANSFO

SQUARE D STARTING SWITCH MOTOR 2510 WW2 SER A
 
SQUARE D CLASS 9001 CONTROL STATION ENCLOSURE KY-1 SER. A

SQUARE D .25-2.5PSI PRESSURE SWITCH CLASS-9012 AMW-1 105216
 
SQUARE D K3E2166D CLASS 9003 32A 660V CONTACT BLOCK, NNB
 
SQUARE D 600V 175A 2 POLE POWER DISTRIBUTION BLOCK 9080 LBC262104
 
SQUARE D 3 POLE TRAILER FUSE BLOCK 40567-016-51
 
AEG SQUARE D POWER MODULE 52914-036-50 17A8
 
SQUARE D ILLUMINATED RED PUSHBUTTON LOT OF 2 9001 TP-35 SER H
 
SQUARE D CLASS 8910 600VAC 40A CONTACTOR DPA33S44 SER. A
 
SQUARE-D * LIMIT SWITCH * TUB 1
 
SQUARE D 9001KS25K2 KEY OPERATED SELECTOR SWITCH, NNB
 
SQUARE D STARTER NEMA SIZE 00 SER C 8536
 
SQUARE D 600VAC 400A 3-POLE CIRCUIT BREAKER LAL3640036M1021 *CHIPPED PLASTIC*
 
SQUARE D OVERLOAD RELAY THERMAL UNIT B1.67 LOT OF 4
 
SQUARE D 9002 AW-2 FOOT SWITCH
 
SQUARE D SY/MAX PARALLEL DIGITAL DRIVER MODULE 8030 EQ5138-G1
 
SQUARE D 9070 SK5271S SER B TRANSFORMER DISCONNECT, 500 VA 230/460/115 V
 
SQUARE D DC WELDER MICRO BOARD 8997 EQ-5210 SMB-10 SER. A REV. 2.11
 
SQUARE D 2 POLE 90AMP 120/240VAC CIRCUIT BREAKER LM-4683
 
SQUARE D THERMAL OVERELOAD RELAY BO.63 LOT OF 4
 
SQUARE D 400A 2-POLE CIRCUIT BREAKER LAL2640036MV105?2
 
SQUARE D .150KVA 55°C CONTROL TRANSFORMER 9070 K150D1 SER-A
 
SQUARE D HF THERMAL OVERLOAD RELAY HEATER ELEMENT B4.15 NIB, LOT OF 5
 
SQUARE D 1HP VARIABLE FREQUENCY AC DRIVE ATV58NU18N4KU
 
SQUARE D 60HZ 3000VA TRANSFORMER DISCONNECT SK5271X FORM G13 SER. A
 
SQUARE D 600V 400A 3 POLE CIRCUIT BREAKER LA36400 CHIPPED PIECE
 
SQUARE D 300T3HNV SORGEL INSULATED TRANSFO

SQUARE D STARTING SWITCH MOTOR 2510 WW2 SER A
 
SQUARE D CLASS 9001 CONTROL STATION ENCLOSURE KY-1 SER. A

SQUARE D .25-2.5PSI PRESSURE SWITCH CLASS-9012 AMW-1 105216
 
SQUARE D K3E2166D CLASS 9003 32A 660V CONTACT BLOCK, NNB
 
SQUARE D 600V 175A 2 POLE POWER DISTRIBUTION BLOCK 9080 LBC262104
 
SQUARE D 3 POLE TRAILER FUSE BLOCK 40567-016-51
 
AEG SQUARE D POWER MODULE 52914-036-50 17A8
 
SQUARE D ILLUMINATED RED PUSHBUTTON LOT OF 2 9001 TP-35 SER H
 
SQUARE D CLASS 8910 600VAC 40A CONTACTOR DPA33S44 SER. A
 
SQUARE-D * LIMIT SWITCH * TUB 1
 
SQUARE D 9001KS25K2 KEY OPERATED SELECTOR SWITCH, NNB
 
SQUARE D STARTER NEMA SIZE 00 SER C 8536
 
SQUARE D 600VAC 400A 3-POLE CIRCUIT BREAKER LAL3640036M1021 *CHIPPED PLASTIC*
 
SQUARE D OVERLOAD RELAY THERMAL UNIT B1.67 LOT OF 4
 
SQUARE D 9002 AW-2 FOOT SWITCH
 
SQUARE D SY/MAX PARALLEL DIGITAL DRIVER MODULE 8030 EQ5138-G1
 
SQUARE D 9070 SK5271S SER B TRANSFORMER DISCONNECT, 500 VA 230/460/115 V
 
SQUARE D DC WELDER MICRO BOARD 8997 EQ-5210 SMB-10 SER. A REV. 2.11
 
SQUARE D 2 POLE 90AMP 120/240VAC CIRCUIT BREAKER LM-4683
 
SQUARE D THERMAL OVERELOAD RELAY BO.63 LOT OF 4
 
SQUARE D 400A 2-POLE CIRCUIT BREAKER LAL2640036MV105?2
 
SQUARE D .150KVA 55°C CONTROL TRANSFORMER 9070 K150D1 SER-A
 
SQUARE D HF THERMAL OVERLOAD RELAY HEATER ELEMENT B4.15 NIB, LOT OF 5
 
SQUARE D 1HP VARIABLE FREQUENCY AC DRIVE ATV58NU18N4KU
 
SQUARE D 60HZ 3000VA TRANSFORMER DISCONNECT SK5271X FORM G13 SER. A
 
SQUARE D 600V 400A 3 POLE CIRCUIT BREAKER LA36400 CHIPPED PIECE
 
SQUARE D 300T3HNV SORGEL INSULATED TRANSFO

SQUARE D STARTING SWITCH MOTOR 2510 WW2 SER A
 
SQUARE D CLASS 9001 CONTROL STATION ENCLOSURE KY-1 SER. A

SQUARE D .25-2.5PSI PRESSURE SWITCH CLASS-9012 AMW-1 105216
 
SQUARE D K3E2166D CLASS 9003 32A 660V CONTACT BLOCK, NNB
 
SQUARE D 600V 175A 2 POLE POWER DISTRIBUTION BLOCK 9080 LBC262104
 
SQUARE D 3 POLE TRAILER FUSE BLOCK 40567-016-51
 
AEG SQUARE D POWER MODULE 52914-036-50 17A8
 
SQUARE D ILLUMINATED RED PUSHBUTTON LOT OF 2 9001 TP-35 SER H
 
SQUARE D CLASS 8910 600VAC 40A CONTACTOR DPA33S44 SER. A
 
SQUARE-D * LIMIT SWITCH * TUB 1
 
SQUARE D 9001KS25K2 KEY OPERATED SELECTOR SWITCH, NNB
 
SQUARE D STARTER NEMA SIZE 00 SER C 8536
 
SQUARE D 600VAC 400A 3-POLE CIRCUIT BREAKER LAL3640036M1021 *CHIPPED PLASTIC*
 
SQUARE D OVERLOAD RELAY THERMAL UNIT B1.67 LOT OF 4
 
SQUARE D 9002 AW-2 FOOT SWITCH
 
SQUARE D SY/MAX PARALLEL DIGITAL DRIVER MODULE 8030 EQ5138-G1
 
SQUARE D 9070 SK5271S SER B TRANSFORMER DISCONNECT, 500 VA 230/460/115 V
 
SQUARE D DC WELDER MICRO BOARD 8997 EQ-5210 SMB-10 SER. A REV. 2.11
 
SQUARE D 2 POLE 90AMP 120/240VAC CIRCUIT BREAKER LM-4683
 
SQUARE D THERMAL OVERELOAD RELAY BO.63 LOT OF 4
 
SQUARE D 400A 2-POLE CIRCUIT BREAKER LAL2640036MV105?2
 
SQUARE D .150KVA 55°C CONTROL TRANSFORMER 9070 K150D1 SER-A
 
SQUARE D HF THERMAL OVERLOAD RELAY HEATER ELEMENT B4.15 NIB, LOT OF 5
 
SQUARE D 1HP VARIABLE FREQUENCY AC DRIVE ATV58NU18N4KU
 
SQUARE D 60HZ 3000VA TRANSFORMER DISCONNECT SK5271X FORM G13 SER. A
 
SQUARE D 600V 400A 3 POLE CIRCUIT BREAKER LA36400 CHIPPED PIECE
 
SQUARE D 300T3HNV SORGEL INSULATED TRANSFO

SQUARE D STARTING SWITCH MOTOR 2510 WW2 SER A
 
SQUARE D CLASS 9001 CONTROL STATION ENCLOSURE KY-1 SER. A