PMDX Forum

General Category => Parallel Port breakout boards, motherboards, and dedicated accessories => Topic started by: CNCRouter4fun on August 16, 2015, 04:59:06 PM

Title: PMDX107 COM and Agnd Wirng question with ASKPOWERA131 VFD
Post by: CNCRouter4fun on August 16, 2015, 04:59:06 PM

I thought I was purchasing a Huanyang VFD but got an ASKPOWER A131 that looks the same but the wiring and parameters are different.  My current issue is that there seems to be a single gnd input terminal on the VFD. This would have the J1 COM and Agnd connected together to the same VFD terminal.  The PMDX107 manual repeatedly says not to connect grounds together at risk of cosmic crisis and loss of isolation.  Any suggestions?  I am including the VFD wiring diagram and terminal pinout diagram.

Second question:  Since both the PDMX107 and the VFD can be set for 0-5V or 0-10v is one better than the other?

Third: Does anyone have any feedback on parameter settings for the ASKPOWER A131? 

Note: The spindle I received with the ASKPOWER did not come with a connector.  It was a slightly different style with a bayonet style barrel. I could not locate one except from a factory in China that wanted to talk production quantity so I had to change out and re-solder the bulkhead connector on the spindle.  Found setup info for the Huanyang but yet to find any on the ASKPOWER. The message is be careful when purchasing.
Thanks,
Mark

Title: Re: PMDX107 COM and Agnd Wirng question with ASKPOWERA131 VFD
Post by: Steve Stallings on August 16, 2015, 06:37:37 PM

Hi Mark,

Not to worry. The analog voltage output and the run signals from the PMDX-107 are both fully isolated from the host computer and from each other. This makes it possible to connect both the Agnd and the COM from the PMDX-107 to the same GND terminal on the AskPower VFD without violating any grounding rules.

It is a bit confusing that the chart from page 11 of the AskPower manual shows only one terminal labeled GND whereas the wiring diagram from page 5 shows 3 different GND terminals.

In your case you should use the following connections:

AskPower         PMDX-107

12V OUT          Aref
10V IN             Aout
GND                 Agnd, COM
FWD                Fwd/Run
REV                 Rev/Dir

You will need to set some parameters, including one to tell the AskPower to look for its analog speed control voltage on the 10V IN terminal, and another to tell it to look at the FWD and RUN terminals instead of its front panel for start signals.

It is likely that the GND on the 16 pin terminal strip of the AskPower is not the same ground as the main safety ground and I would not recommend connecting them together unless you find a specific mention of that somewhere in the AskPower manual.

If you do find the entire manual in PDF form, we would like a copy for our files. If it is over 5 megabytes, please send it to our support email address as an attachment rather than post it here.

Steve Stallings

Title: Re: PMDX107 COM and Agnd Wirng question with ASKPOWERA131 VFD
Post by: CNCRouter4fun on August 16, 2015, 07:53:07 PM

Thank you for the quick response.  I will scan and send the manual tomorrow.
Mark

Title: Re: PMDX107 COM and Agnd Wirng question with ASKPOWERA131 VFD
Post by: Steve Stallings on August 16, 2015, 09:23:01 PM

I found more of the manual on line here:

http://s020.radikal.ru/i702/1505/4e/063561512250.jpg
http://s019.radikal.ru/i607/1505/2d/80149806b94a.jpg
http://s019.radikal.ru/i639/1505/1b/eb9845938ddb.jpg
http://s019.radikal.ru/i604/1505/22/c16a10f0d495.jpg

It looks like you need to set:

Parameter     Value
Pn 03            4      select external 0-10V signal
Pn 04            2      use external run signals

Title: Re: PMDX107 COM and Agnd Wirng question with ASKPOWERA131 VFD
Post by: CNCRouter4fun on August 17, 2015, 06:22:13 PM

Thanks Steve. Whole manual attached.
Mark