T8310

T8310

其实，一件事，就算再美好，一旦没有结果，就不要再纠缠，久了你会倦，会累；一个人，就算再留念，如果抓不住，就要适时放手，久了你会神伤，会心碎。有时，放弃是另一种坚持。任何事，任何人，都会成为过去。

：祖巧丽

：

在机床数控系统中，电气设备的控制占有重要的地位。目前，一般采用可编程控制器（PLC）进行机床电气控制。PLC可靠性高，使用方便，对于复杂的，控制点数较多的应用场合，可以在PLC基本单元外加上一定数目的扩展单元，实现复杂的电气控制功能。在数控机床上。如果采用PLC进行电气控制，必需在PLC与NC 间建立电气，否则，NC程序中的MST指令反映不到PLC中，PLC也就不可能做出相应的动作。目前市场上出售的PLC一般都具有通讯功能，可以利用这种功能在PLC与NC之间建立。由于PLC的通讯方式为串行通讯，通讯速度比较低，对于数控机床的某些实时性要求很强的信号如急停，超程等。就难以胜任一必需采取其它措施满足这些特殊需要，但这又增加了系统的复杂程度。为了提高速度，降低戚本。在数控系统中t可以采用开关量I/O板加外接继电器，配台主机的软件对电气开关进行控制。但此方案周NC主机要直接参与电气控制逻辑的运算过程。占用了主机的部分工作时间，增加了软件的复杂程度。更重要的是。把过多的功能集中到主机使主机-发生故障的风险加大 出于对实时性和可靠性的考虑。作者在研制五轴联动数控系统的过程中。设计了一种嵌入式PLC.在保证实时性的同时。使故障风险相对分散。

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