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When the personal computer (PC) serial port connection is disconnected from the controller, why does the SMC-2000/3010/4000 controller become unresponsive?

connection controller disconnected pc personal computer port serial smc-2000
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When the personal computer (PC) serial port connection is disconnected from the controller, why does the SMC-2000/3010/4000 controller become unresponsive?

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The SMC-xxxx products use hardware handshaking, and if there are commands in the program that send unsolicited messages (MG, IN commands) they are transmitted from the default port. The serial po…

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