这是我第一次尝试使用
Pyvisa
与Agilent 34970A
通信,使用RS232
连接(通过USB端口)。以下是插入基本的第一行时发生的情况:IN: import visa
IN: rm=visa.ResourceManager()
IN: print rm.list_resources()
(u'ASRL4::INSTR',)
IN: inst=rm.open_resource("ASRL4::INSTR")
IN: print inst.query("*IDN?")
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Anaconda2\lib\site-packages\pyvisa-1.8-py2.7.egg\pyvisa\resources\messagebased.py", line 407, in query
return self.read()
File "C:\Anaconda2\lib\site-packages\pyvisa-1.8-py2.7.egg\pyvisa\resources\messagebased.py", line 332, in read
message = self.read_raw().decode(enco)
File "C:\Anaconda2\lib\site-packages\pyvisa-1.8-py2.7.egg\pyvisa\resources\messagebased.py", line 306, in read_raw
chunk, status = self.visalib.read(self.session, size)
File "C:\Anaconda2\lib\site-packages\pyvisa-1.8-py2.7.egg\pyvisa\ctwrapper\functions.py", line 1582, in read
ret = library.viRead(session, buffer, count, byref(return_count))
File "C:\Anaconda2\lib\site-packages\pyvisa-1.8-py2.7.egg\pyvisa\ctwrapper\highlevel.py", line 188, in _return_handler
raise errors.VisaIOError(ret_value)
pyvisa.errors.VisaIOError: VI_ERROR_TMO (-1073807339): 操作未完成前超时。
每次尝试读取值时都会出现此超时错误。我还增加了较长的超时时间,但仍然无效,我等待了几分钟也没有结果。对于这个问题有什么想法吗?