2711-K10C9

2711-K10C9

2711-K10C9

2711-K10C9

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。

sk-r1-fan1-f8  4  面价15594

ABB   TD0810-A         2

FRN0007E2S-4C    1

BMXCPS3020 5面价 4242

BMXP342020 4面价11356

BMXP341000 1面价6337

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6ES7223-1BL32-0XB0  2个

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3SE5282-0HC05-8RA01  1

MPA32W32（3200A/50kA）  GE断路器。      1

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443-1EX11-0XE0

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700-HB33A2    2       面价177.41

ABE7CPA412   4

A06B-0078-B103   1

7ME4100-1DC20-1AB1   1

3SE5232-0HC05-1AB4   5

6ES7 521-1BL01-0AB0   1

6ES7 590-1AE80-0AA0   1

6SL3 120-7TE23-6AA3   1

130-7TE23-6AA3

6ES7675-1DF20-6AB0       1

型号:6AV6642-5Dc10-1AC0    1

6AV2124-0QC02-0AX0  2台   

HVF-CIII/400    1

6SL3220-2YD42-0UB0   1

3HAC021699-001(ABB)：1条

三菱   MR-J2S-70A    4

安川线性马达S轴  SGLGW-30A080CP       4

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安川线性马达Y轴   SGLTW-40A600BP       2

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电抗器：XKSG2-80/1.5  2

整流板：ABB  64530276D  一块

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