Umi 7774

[Vitto]

Hi,

I have a question:

I have to wire umi 7774 and PXI 7350 , when I wire V and Viso and motion I/O cable to UMI , all axes are disabled , and FAULT , DISABLED leds are ON.

Is it normal??

I have already configured the PXI 7350.

[Chuck_81]

Hi Vitto,

you can take a look to this document for more informations about how to connect signals correctly to the UMI interface you're using:

How Do I get the 73xx Controller and UMI-7764 to Drive a Third Party Stepper Motor?

Hope this helps.

Best regards,

Fabio

[James_McN]

Hi Vitto,

Usually the axes will be disabled on an uninitialised card.  You need to make sure your configuration enables the axis and then you need to click on initialise to actually apply those settings, this should then apply the settings to the card and you should see the the lights go out.

If the fault light is still on check the status tab of the card or try the interactive views to see if they show what the fault may be.

Regards,

[Fernandes]

Hi,

I'm using the UMI-7774 but the system does not work properly. My doubts are:

* My encoder does not have Channel A- (inv), channel B-(inv) and index- (inv). So I make a circuit to invert the channels A, B and Index with a CI-7404, converting the single-ended output to differential. Does it really works or only differential encoders are avaiable with UMI-7774?

* I connected the hall sensors A,B and C of the brushless motor at the feedback connector like show the Figure 3.12 of the UMI-7774 user manual. But my third-party drive also need to connect the hall sensors (a fault happend if it does not done). What should I do? Do i have to connect hall sensors at feedback connector and also third-party drive?

* What does Active low and active high means? When I have to change the LIMIT LED, FAULT and ENABLE to active high?

Thanks,

Renato Fernandes

[Highland_Controls]

Your encoder and halls should go to the drive, and your drive should have a simulated encoder output that goes to the UMI.  That is probably differential.   Please tell us the make and model of your drive.

Active high and active low mean just that.  Active high= put a positive voltage (high) on that input, then it turns on.  Active low= put zero volts (low) on that input and it turns on.

[Fernandes]

HI,

My drive is an AMC b25a20 - Brushless servo amplifier. I connected the hall sensors from motor to the pin 12, 13 and 14 of P1 ( The manual of this amplifier can easily found at web). So, How can I connect the drive to the hall sensors inputs of UMI-7774?

[Fernandes]

Sorry, the correct model of my driver\amplifier is AMC b25a20acr - Brushless PWM Servo Amplifier.

Thanks.

[Highland_Controls]

The AMC drives are a little different.  The UMI doesn't need the halls, only the drive needs them for commutation.  You will need to set up the drive in open loop mode and run the encoder directly to the UMI.  Just don't connect the inverted encoder inputs, and see if you get counts.

[Fernandes]

Where can i see the encoder counts in the MAX?

Thanks

[Highland_Controls]

Under the Interactive Control section