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6FC5611-0CA01-0AA1
6FC5611-0CA01-0AA1
6FC5611-0CA01-0AA1
4、 变频器运行时对PLC干扰应注意的问题
变频器运行时会对周围电气设备(包括P L C )产生较强的电磁干扰,同时变频器主电路断路器等开关器件动作时也会影响PLC 的正常工作。为防止变频器运行时对PLC干扰,变频器与P L C 相连接时应该注意以下几点:
(1)对PLC 本身应按规定的接线标准和接地条件进行接地,而且应注意避免和变频器使用共同的接地线,且在接地时使二者尽可能分开。
(2)当电源电压波动大,谐波成分多时,为抑制谐波干扰,应在PLC 的电源模块及输入/ 输出模块的电源线上接入噪音滤波器或者隔离变压器。如果干扰仍严重,应考虑在变频器主回路中接入电抗器、变压器和噪音滤波器等措施。
(3)变频器和P L C 安装在同一电控柜时,应尽可能使与变频器有关的电缆和与PLC 有关的电缆分开安装,尤其是连接变频器的强电电缆与连接PLC 的弱电电缆更要分开安装。
4 结束语
变频器和P L C 间连接问题,涉及到数字量信号连接、模拟量信号连接以及避免干扰应注意的问题;在实际应用中,两者间的连接还涉及到用弱电信号控制强电的问题。因此,应引起重视,避免干扰造成变频器、PLC 的误动作;避免连接不当造成PLC 或变频器的损坏。
如果购买单位的在质保日期一年内发现有质量缺陷的,可以进行一个免费维修或更换。
FR-A740-3.7K-CHT 一件
ACS510-01-088A-4(45kW)2
ACS510-01-125A-4 55KW 1
ACS510-01-031A-4(15kW)2
GD200A-037G/045P-4 45kW 1
ACS510-01-025A-4(11kW) 2
TPC7012EI 3
MT6071iP 2
FX3U-64MT/ES-A 1
FR-A840-00380-2-60 1
FR-DU08 1
FR-PA07 1
FX3U-4AD-TC-ADP 1
FX3U-485ADP-MB 1
FX3U-1PG 1
7V11006B050 DC24V 线长50cm 30
7V120-06-b DC24V线长0.5M 30
FR-E840-0026-4-60 1
FR-A840-00126-2-60 1
E82EV552_4C040 1个伦茨
FRN55G1S-4A 1
FRN110G1S-4A 1
NWIO-01 1
ZPOW-591 2
ACS880-01-430A-3+ZINT-592-FOR-ACS880-01 2
RPBA-01 20
1756-L83E-----
6AV2124-0QC02-0AX1 数量5----
6ES7515-2AM02-0AB0 数量2-------
6ES7515-2AM01-0AB0---------
1747-L553------
1756-L72-------
1756-EN2TR--------
6ES7155-6AU01-0BN0-------
140CPU56150 1-----
ACS580-01-169A-4-----
3BHL000359P0003-------
181-4MB00-0AX0 1
6AU1400-2PA23-0AA0 1-------
BMXNRP0200 6
6ES7953-8LF11-0AA0+内存128KB 5-------
6ES7901-3DB30-0XA0 2
PPI-RS485 6ES7901-3CB30-0XA0 2根
37148/DC24V 2
ZB2BS44C+ZB2BZ104C+ZB2BE 101C 8
BES M18MI-PSC80B-S04G 5
IEC/EN 60947-4-1 3
MS-120-24 2
BGE1.5 8253854 1
1827000001 G1/4 7
2938633 1
6FX8002-5DA05-1CJ0 2
3RH1131-2BB40 8
6SE6400-0BP00-0AA1 1
3RT5065-6...6(220v) 1
VFS2410-3G 1
OMD30M-R2000-B23-V1V1D-1L 1
R067024040 4
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