PXI-4113 - Driver Error -1074118574

[deuxmc]

Hello, 

I didn't find answer for my problem on this forum so I'm writting a new topic. 

I have several PXI-4113 and I have often the following problem : 

Driver Error  -1074118574: An error has been detected with the sense leads. This error could result from a reversal or incorrect connection of the sense lines. Please verify your hardware configuration.

5537 Status Code: -235106

It could appear randomly on each device. 

I didn't find te reason of this problem. All devices seem to be in the same initial state and the same hardware configuration when the error occurs and when everything's fine. 

I used for a long time the ni dc power driver 19.1 and I updated it to 20.1. The error remains. 

Thank you for reading this. If you have an idea don't hesitate to help me 🙂 

Have a nice day

[santo_13]

This may be related to how you use connect/disconnect or enable/disable the outputs of the instrument.

If possible, please share a snippet of the code and also the connection diagram.

[deuxmc]

Thank you santo_13 for your answer. 

First, you can find the way I connected my devices to the power supply : 

I chose to connect the 2 channels in serial to provide more than 10V. 

Second, you can find an soft example : 

- init Power Supply -> session configuration

self.session = nidcpower.Session(resource_name=self.nom,channels=self.channel,reset=True)
self.session.reset_device()

self.sesion_state = 0 # état de la session d'alim : 0 pas commitée - 1 commitée
self.state = 0 # état de l'alim : 0 éteinte - 1 allumée

self.channel = self.channel

self.voltage_level = self.params[0]
self.voltage_level_range = self.params[1]
self.current_limit = self.params[2]
self.current_limit_range = self.params[3]

self.session.channels[self.channel].voltage_level = self.voltage_level
self.session.channels[self.channel].voltage_level_range = self.voltage_level_range
self.session.channels[self.channel].current_limit = self.current_limit
self.session.channels[self.channel].current_limit_range = self.current_limit_range

def _alimON(self):
    """
        alimentation du device que s'il est dans l'état éteint ie state = 0
    :return:
    """
    _output_enabled = 0

    # if session not commited
    if (self.session_state == 0):
        self.session.commit()
        self.session.initiate()
        Log.LOG.debug("Session commited")
        self.session_state = 1
    
    # if session commited and outputs disable
    if (self.state == 0):
        self.session.channels[self.channel].output_enable 
        Log.LOG.debug("Output enabled")
        self.state = 1
        Log.LOG.debug("Etat alim : {}".format(self.state))
        self._checkAlim()

def _alimOFF(self):
    """
        arrêt de l'alim du device
        on remet l'état de l'alim à éteint (state = 0) si l'alim est allumée
    :return:
    """
    if (self.state == 1):
        # self.session.disable()
        self.session.channels[self.channel].output_enabled = False
        self.state = 0

def _close(self):
    self._alimOFF()
    self.session.disable()
    self.session.close()

def _checkAlim(self):
    """
    vérification que alim bien allumée
    :return:
    """
    channel = []
    tolerance = 0.5
    channel.append(self.channel.split(','))
    for ch in range(len(channel[0])):
        try:
            voltage_meas = self.session.channels[ch].measure(nidcpower.MeasurementTypes.VOLTAGE)
            Log.LOG.debug("Voltage measured : {}".format(voltage_meas))
        except:
            Log.LOG.debug("Pas possible de mesurer tension avec cette alim")
        voltage = self.session.channels[ch].voltage_level
        if ((voltage < self.voltage_level-tolerance) | (voltage > self.voltage_level+tolerance)):
            raise ValueError("Erreur d'alimentation")

I run a tests serie, for example test_1.py and test_2.py. 

I begin to create :

- Power Supply object 

- 2 Devices objects (the 2 devices share the same power supply)

For test_1, I use the function _alimON() and at the test's end _alimOFF(). 

Same for test_2. 

And after my 2 tests I use the _close() function. 

Is that clear enough? 

Don't hesitate to ask for more informations 🙂

Thank you. 

[santo_13 · Accepted solution]

Your connection seems good for Force lines but you did not provide information on how you connected the sense lines. And also you don't seem to have configured the sense mode in your code.

[deuxmc]

I didn't connect sense lines because I don't need to use them. 

But I just read that the sense leads must always be connected. So I plugged my jumpers for a local sense HW configuration. 

And I haven't configure the sense mode in my code.

But I just found out that the default value for sense mode is local. Therefore I think my problem is solved 🙂

Thank you 

[santo_13]

Great!

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