can't connect to multimeter with python (visa)
0
I am trying to communicate with multimeter agilent 34401a with python. I use visa library. My source is very simple:
import visa
rm = visa.ResourceManager()
list_re = rm.list_resources()
print(list_re)
inst_v = rm.open_resource('ASRLCOM1::INSTR')
inst_v.write('SYSTEM:REMOTE')
inst_v.write('*CLS')
print( inst_v.query('*IDN?'))
after last line I get errors:
E:softpytest>open.py
('ASRLCOM1::INSTR', 'ASRLCOM2::INSTR')
Traceback (most recent call last):
File "E:softpytestopen.py", line 8, in <module>
print( inst_v.query('*IDN?'))
File "E:softpylibsite-packagespyvisaresourcesmessagebased.py", line 569, in query
return self.read()
File "E:softpylibsite-packagespyvisaresourcesmessagebased.py", line 413, in read
message = self._read_raw().decode(enco)
File "E:softpylibsite-packagespyvisaresourcesmessagebased.py", line 386, in _read_raw
chunk, status = self.visalib.read(self.session, size)
File "E:softpylibsite-packagespyvisa-pyhighlevel.py", line 350, in read
raise errors.VisaIOError(ret[1])
pyvisa.errors.VisaIOError: VI_ERROR_TMO (-1073807339): Timeout expired before operation completed.
If i write each line manually in console i see:
>>> inst_v.write('SYSTEM:REMOTE')
(15, <StatusCode.success: 0>)
or
>>> inst_v.write('SYST:REM')
(10, <StatusCode.success: 0>)
what does this mean and where is my problem? i connect with aglent through moxa uport 1250 (rs-232). any help will be appreciated
python serial-port visa
asked Nov 13 '18 at 7:17
dsheedshee
62
add a comment |
0
I am trying to communicate with multimeter agilent 34401a with python. I use visa library. My source is very simple:
import visa
rm = visa.ResourceManager()
list_re = rm.list_resources()
print(list_re)
inst_v = rm.open_resource('ASRLCOM1::INSTR')
inst_v.write('SYSTEM:REMOTE')
inst_v.write('*CLS')
print( inst_v.query('*IDN?'))
after last line I get errors:
E:softpytest>open.py
('ASRLCOM1::INSTR', 'ASRLCOM2::INSTR')
Traceback (most recent call last):
File "E:softpytestopen.py", line 8, in <module>
print( inst_v.query('*IDN?'))
File "E:softpylibsite-packagespyvisaresourcesmessagebased.py", line 569, in query
return self.read()
File "E:softpylibsite-packagespyvisaresourcesmessagebased.py", line 413, in read
message = self._read_raw().decode(enco)
File "E:softpylibsite-packagespyvisaresourcesmessagebased.py", line 386, in _read_raw
chunk, status = self.visalib.read(self.session, size)
File "E:softpylibsite-packagespyvisa-pyhighlevel.py", line 350, in read
raise errors.VisaIOError(ret[1])
pyvisa.errors.VisaIOError: VI_ERROR_TMO (-1073807339): Timeout expired before operation completed.
If i write each line manually in console i see:
>>> inst_v.write('SYSTEM:REMOTE')
(15, <StatusCode.success: 0>)
or
>>> inst_v.write('SYST:REM')
(10, <StatusCode.success: 0>)
what does this mean and where is my problem? i connect with aglent through moxa uport 1250 (rs-232). any help will be appreciated
python serial-port visa
asked Nov 13 '18 at 7:17
dsheedshee
62
What you do inconsoleis different from yourscript? What does'*CLS'do?
– stovfl
Nov 13 '18 at 10:04
Your script is crashing on the*IDN?line, so it is also accepting theSYSTEM:REMOTEcommand which comes before this. Your code is crashing at the first point where the instrument is expected to respond because it is not responding. I would check if you are using the correct port (is your device connected to port 2 maybe?), and check that you are using the correct terminator. Try*IDN?n, for example. It might be easier to do this kind of debugging using the NI MAX tool.
– RPM
Nov 13 '18 at 13:49
add a comment |
0
0
0
I am trying to communicate with multimeter agilent 34401a with python. I use visa library. My source is very simple:
import visa
rm = visa.ResourceManager()
list_re = rm.list_resources()
print(list_re)
inst_v = rm.open_resource('ASRLCOM1::INSTR')
inst_v.write('SYSTEM:REMOTE')
inst_v.write('*CLS')
print( inst_v.query('*IDN?'))
after last line I get errors:
E:softpytest>open.py
('ASRLCOM1::INSTR', 'ASRLCOM2::INSTR')
Traceback (most recent call last):
File "E:softpytestopen.py", line 8, in <module>
print( inst_v.query('*IDN?'))
File "E:softpylibsite-packagespyvisaresourcesmessagebased.py", line 569, in query
return self.read()
File "E:softpylibsite-packagespyvisaresourcesmessagebased.py", line 413, in read
message = self._read_raw().decode(enco)
File "E:softpylibsite-packagespyvisaresourcesmessagebased.py", line 386, in _read_raw
chunk, status = self.visalib.read(self.session, size)
File "E:softpylibsite-packagespyvisa-pyhighlevel.py", line 350, in read
raise errors.VisaIOError(ret[1])
pyvisa.errors.VisaIOError: VI_ERROR_TMO (-1073807339): Timeout expired before operation completed.
If i write each line manually in console i see:
>>> inst_v.write('SYSTEM:REMOTE')
(15, <StatusCode.success: 0>)
or
>>> inst_v.write('SYST:REM')
(10, <StatusCode.success: 0>)
what does this mean and where is my problem? i connect with aglent through moxa uport 1250 (rs-232). any help will be appreciated
python serial-port visa
asked Nov 13 '18 at 7:17
dsheedshee
62
I am trying to communicate with multimeter agilent 34401a with python. I use visa library. My source is very simple:
import visa
rm = visa.ResourceManager()
list_re = rm.list_resources()
print(list_re)
inst_v = rm.open_resource('ASRLCOM1::INSTR')
inst_v.write('SYSTEM:REMOTE')
inst_v.write('*CLS')
print( inst_v.query('*IDN?'))
after last line I get errors:
E:softpytest>open.py
('ASRLCOM1::INSTR', 'ASRLCOM2::INSTR')
Traceback (most recent call last):
File "E:softpytestopen.py", line 8, in <module>
print( inst_v.query('*IDN?'))
File "E:softpylibsite-packagespyvisaresourcesmessagebased.py", line 569, in query
return self.read()
File "E:softpylibsite-packagespyvisaresourcesmessagebased.py", line 413, in read
message = self._read_raw().decode(enco)
File "E:softpylibsite-packagespyvisaresourcesmessagebased.py", line 386, in _read_raw
chunk, status = self.visalib.read(self.session, size)
File "E:softpylibsite-packagespyvisa-pyhighlevel.py", line 350, in read
raise errors.VisaIOError(ret[1])
pyvisa.errors.VisaIOError: VI_ERROR_TMO (-1073807339): Timeout expired before operation completed.
If i write each line manually in console i see:
>>> inst_v.write('SYSTEM:REMOTE')
(15, <StatusCode.success: 0>)
or
>>> inst_v.write('SYST:REM')
(10, <StatusCode.success: 0>)
what does this mean and where is my problem? i connect with aglent through moxa uport 1250 (rs-232). any help will be appreciated
python serial-port visa
python serial-port visa
asked Nov 13 '18 at 7:17
dsheedshee
62
asked Nov 13 '18 at 7:17
dsheedshee
62
asked Nov 13 '18 at 7:17
dsheedshee
62
asked Nov 13 '18 at 7:17
dsheedshee
62
asked Nov 13 '18 at 7:17
dsheedshee
62
62
What you do inconsoleis different from yourscript? What does'*CLS'do?
– stovfl
Nov 13 '18 at 10:04
Your script is crashing on the*IDN?line, so it is also accepting theSYSTEM:REMOTEcommand which comes before this. Your code is crashing at the first point where the instrument is expected to respond because it is not responding. I would check if you are using the correct port (is your device connected to port 2 maybe?), and check that you are using the correct terminator. Try*IDN?n, for example. It might be easier to do this kind of debugging using the NI MAX tool.
– RPM
Nov 13 '18 at 13:49
add a comment |
What you do inconsoleis different from yourscript? What does'*CLS'do?
– stovfl
Nov 13 '18 at 10:04
Your script is crashing on the*IDN?line, so it is also accepting theSYSTEM:REMOTEcommand which comes before this. Your code is crashing at the first point where the instrument is expected to respond because it is not responding. I would check if you are using the correct port (is your device connected to port 2 maybe?), and check that you are using the correct terminator. Try*IDN?n, for example. It might be easier to do this kind of debugging using the NI MAX tool.
– RPM
Nov 13 '18 at 13:49
What you do in
console is different from your script? What does '*CLS' do?– stovfl
Nov 13 '18 at 10:04
What you do in
console is different from your script? What does '*CLS' do?– stovfl
Nov 13 '18 at 10:04
Your script is crashing on the
*IDN? line, so it is also accepting the SYSTEM:REMOTE command which comes before this. Your code is crashing at the first point where the instrument is expected to respond because it is not responding. I would check if you are using the correct port (is your device connected to port 2 maybe?), and check that you are using the correct terminator. Try *IDN?n, for example. It might be easier to do this kind of debugging using the NI MAX tool.– RPM
Nov 13 '18 at 13:49
Your script is crashing on the
*IDN? line, so it is also accepting the SYSTEM:REMOTE command which comes before this. Your code is crashing at the first point where the instrument is expected to respond because it is not responding. I would check if you are using the correct port (is your device connected to port 2 maybe?), and check that you are using the correct terminator. Try *IDN?n, for example. It might be easier to do this kind of debugging using the NI MAX tool.– RPM
Nov 13 '18 at 13:49
add a comment |
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What you do in
consoleis different from yourscript? What does'*CLS'do?– stovfl
Nov 13 '18 at 10:04
Your script is crashing on the
*IDN?line, so it is also accepting theSYSTEM:REMOTEcommand which comes before this. Your code is crashing at the first point where the instrument is expected to respond because it is not responding. I would check if you are using the correct port (is your device connected to port 2 maybe?), and check that you are using the correct terminator. Try*IDN?n, for example. It might be easier to do this kind of debugging using the NI MAX tool.– RPM
Nov 13 '18 at 13:49