Connecting Yaskawa Sigma FSP Motor Drive With UMI-7774 and PCI-7344

[Vick001]

Dear all

I am trying to connect the UMI-7774 (previously connected to a PCI card 7334 within a PC with windows XP) to a gecko driver g203v, but I cannot manage to move a stepper motor.

I have tested the driver and the motor with the PWM signal from the PCI card and it worked, for frequencies from 4k to 33k of the PWM.

When I measure the output signal from the UMI device, I get 5 volts amplitude and a normal step signal, but when I connected to the Gecko driver the signal is 1.5 volts amplitude.

The Gecko driver requires a source configuration, whilst the output of the UMI device is sink open collector. I tried to connect the step signal directly to the driver but it did not work, then I connected the UMI ouput through a resistor to 5V source (sink configuration), but it didn´t work. 

Does anyone knows if the UMI device have to be connected only with NI motors drivers?

or can anyone advice how to solve the problem?

Best wishes,

Victor

[mterz]

Hi Victor,

I replied to your question on this post: http://forums.ni.com/t5/Motion-Control-and-Motor-Drives/Connecting-Parker-Compax3-servo-drive-to-umi...

[Vick002]

Dear all,

I am using a PXI 7350 hardware to generate a PWM signal. The PXI is capable of generating this PWM signal by selecting parameters in the configuration VIs from the NI motion 73xx software.

There are a 14 frequencies that can be used. These are:

Clock Divider Value	Clock Value*	NI 7334/42/44 Clock Frequency	NI 7330/40 Clock Frequency	NI 7350 Clock Frequency
512	0	40.00 kHz	48.46 kHz	48.01 kHz
1K	1	20.00 kHz	24.23 kHz	24.00 kHz
2K	2	10.00 kHz	12.11 kHz	12.00 kHz
4K	3	5.00 kHz	6.06 kHz	6.00 kHz
8K	4	2.50 kHz	3.03 kHz	3.00 kHz
16K	5	1.25 kHz	1.51 kHz	1.50 kHz
33K	6	625.00 Hz	757.14 Hz	750.09 Hz
External Clock/256 Hz	7	External Clock/256 Hz	External Clock/256 Hz	External Clock/256 Hz
65K	8	312.50 Hz	378.57 Hz	375.05 Hz
131K	9	156.25 Hz	189.29 Hz	187.52 Hz
262K	10	78.13 Hz	94.64 Hz	93.76 Hz
524K	11	39.06 Hz	47.32 Hz	46.88 Hz
1048K	12	19.53 Hz	23.66 Hz	23.44 Hz
2097K	13	9.77 Hz	11.83 Hz	11.72 Hz
4194K	14	4.88 Hz	5.92 Hz	5.86 Hz
External Clock/ 32,768 Hz	15	External Clock/ 32,768 Hz	External Clock/ 32,768 Hz	External Clock/ 32,768 Hz
*  These clock value numbers are used for purposes of discussion only.

However, the 375.05 Hz and the ones below are exactly the same as the 48KHz and below, which results in a total of only 7 frequencies. I have tried these frequencies with the MAX software from Labview, and I am able to use the 14 frequencies from the PXI 7350 card. I have also use a PCI 7334 and I was able to use MAX and Labview to configure the PWM. 

Do you think that my PXI 7350 card might be damaged? 

Also, could you please let me know how to create a new forum post? 

Best wishes