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因本人不是从事IT行业的,现工作中遇到一个和IT通讯行业有关疑难问题,先谢谢请问各位IT高手能帮我回答.
margret
(margret)
台湾研华的电流环通讯卡PCL-740能否与西门子的TTY电流环卡相通讯(20MA),如果把PCL-740插入PC机中,设置为电流环通讯,TXD为ACTIVE RXD为PASSIVE,选为COM2(2F8,IRQ3),PC机需要做哪些工作?如是否关闭PC机中COM2或需要相应程序之类....怎样在PC机上进行SOFTWARE-HANDSHAKE?PLC-740卡上TXD+表示电流进入还是流出?RXD+表示电流进入还是电流流出?
(#55963@0)
Last Updated: 2001-4-28
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