usb mapped serial visa error

cat099 — Thu, 11 Nov 2010 05:52:16 GMT

Hello All,

i am going to control a usb device with labview,The device have a mapped serial port named "COM13".i checked it in NI-MAX,but when i send a command with using visa test panel(visa_write) in MAX,NI-SPY display error massage.it is stranged that i can read the correct result from buffer with visa_read .

Can you explain it?and give some advices about that.

thanks a lot.

OS is winxp,labview 8.5,visa5.01.

details in below.

> 295. viWrite (ASRL13::INSTR (0x061F6CF8), ".at^cqst?..", 11, 11)
> 进程ID： 0x000011DC 线程ID： 0x00000C98
> 起始时间： 10:04:14.602 调用持续时间 00:00:00.000
> 状态：0xBFFF003E (VI_ERROR_IO)

296. viRead (ASRL13::INSTR (0x061F6CF8), "..", 1024, 2)
进程ID： 0x000011DC 线程ID： 0x00000C98
起始时间： 10:04:16.899 调用持续时间 00:00:00.000
状态：0 (VI_SUCCESS)

297. viRead (ASRL13::INSTR (0x061F6CF8), "^CQST:0..", 1024, 9)
进程ID： 0x000011DC 线程ID： 0x00000C98
起始时间： 10:04:17.727 调用持续时间 00:00:00.000
状态：0 (VI_SUCCESS)

topic usb mapped serial visa error in Instrument Control (GPIB, Serial, VISA, IVI)

usb mapped serial visa error