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["로스먼트 압력 변신기 신호 루프 문제에 대해\n",,

2017-02-02View Original

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Reply #22017-02-03
继续翻译剩余部分。
Reply #32017-02-03
475连接,仪表回路串联个250欧姆电阻
Reply #42017-02-03
串个250欧的电阻的理由是什么呢?
Reply #52017-02-04
hart手操器可以串在电路里,也可以并在电路里。罗斯蒙特说明书里写的很清楚
Reply #62017-02-06
是的,但是一个变送器和一个24V电源能否组成一个hart手操器可以识别的“完整的电路”,我试了是不能识别。如果变送器-I/O-PLC这种完整的“电路”是可以识别的。
Reply #72017-02-07
看看你的电源是有源还是无源的,我记得是无源。具体忘了。你试试吧
Reply #82017-02-08
仪表是无源的,只有两根线,电源是有源无源?谢谢
Reply #92017-02-08
电源也分有源无源,便携式电源有时候带不动智能仪表。另外你试试串接电阻或者并联电阻。总共就这么几种方法,不用担心烧坏表,只要不犯原则错误都可以试试。具体你的故障也没怎么说清楚我也是靠猜的。
Reply #102017-02-08
thank you for patient answer:)
Reply #112017-02-09
hart协议应用很广泛,多试几种情况对以后有帮助。基本现在的智能仪表都可以用Hart通讯,我以前各种接线方式都试过,反正没把表烧坏,不过不建议你向我这样乱试但是也别太担心,大厂家的仪表设计时已经考虑到你可能接线错误,有保护。你英语应该可以,这个对仪表专业很有帮助。我以前是干仪表的,现在不干了,很多东西忘得差不多了,用进废退

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