MM4：当使用差分连接的编码器反馈信号线断线时，变频器不会出现F0090故障而停车

问题： 当使用的差分连接的编码器反馈信号线断线时，变频器为什么不出现F0090故障而停车？ 解答： 在编码器和编码器模板中使用差分配线时可以达到最佳信号清晰度。这在干扰环境中或者使用长电缆时尤其有用。 但是，编码器模块在单端配线或差分配线两种情况下都可以正确运行，因而在使用差分配线时能够容忍线路损坏。 如果模块在A或B线上丢失完整信号，逆变器将报告故障F0090。 更多信息参见MICROMASTER 440 参数列表，“故障和报警”中F0090 表示编码器反馈信号丢失，“参数说明”中P0492表示允许的频率偏差，P0494表示速度反馈信号丢失时采取应对措施的延迟时间，见操作说明第3.5.7.15章的“编码器”。 应用于：MM440 由A&D SD CST写入 条目号:22795432 日期:2006-04-10 QUESTION: Why does my drive not stop with F0090 when an encoder wire breaks when used in a differential connection? ANSWER: Optimum signal clarity is achieved when differential wiring is used between the encoder and encoder module. This is especially useful when situated in a noisy environment or with long cables - however, the module will function correctly both with single ended or differential wiring and as such can tolerate a wire break when differential wiring is used. If the module loses the complete signal on either A or B lines, the inverter will report F0090. For further information see the MICROMASTER 440 Parameter list, “Faults and Alarms” for F0090 = Encoder feedback loss; the “Parameter Description” for P0492 = Allowed frequency difference, and P0494 = Delay frequency loss reaction parameter set-up; and in the Operating Instructions chapter 3.5.7.15 “Encoder” Applies to: MM440 Written by: A&D SD CST Entry ID:22795432 Date:2006-03-16