Do you have a usb to ttl converter? If so you could use a terminal program and do a loop-back test (connect RX to TX)
>________________________________ > From: Viesturs Lācis <viesturs.la...@gmail.com> >To: Enhanced Machine Controller (EMC) <emc-users@lists.sourceforge.net> >Sent: Thursday, March 22, 2012 9:04 AM >Subject: Re: [Emc-users] Smart-serial and 7i43 > >2012/3/18 Peter C. Wallace <p...@mesanet.com>: >> On Sun, 18 Mar 2012, Viesturs L?cis wrote: >> >>> Date: Sun, 18 Mar 2012 07:21:38 -0400 >>> From: "[UTF-8] Viesturs L?cis" <viesturs.la...@gmail.com> >>> Reply-To: "Enhanced Machine Controller (EMC)" >>> <emc-users@lists.sourceforge.net> >>> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> >>> Subject: Re: [Emc-users] Smart-serial and 7i43 >>> >>> 2012/3/17 Peter C. Wallace <p...@mesanet.com>: >>>> Heres tha latest I have(any SSERIAL with 5 registers has to be at least 6 >>>> months old) >>> >>> So I got LinuxCNC to start up without errors. I have connected 8i20 >>> drive to 7i43 card. >>> >>> 1) But I do not see it in "Show HAL config" (I expect it to appear >>> there, if sserial module finds it): >>> http://www.linuxcnc.org/docs/devel/html/man/man9/hostmot2.9.html#8i20 >>> >>> Based on that I understand that communication between sserial and 8i20 >>> is not happening. >>> >>> I should mention that between 8i20 and 7i43 is my diy ttl <--> rs422 >>> converter (I am aware of existence of 7i44 card, but since I only want >>> to test, how 8i20 would perform with my servo motors, I thought that >>> building such a convertor would be cheaper). That converter is based >>> on SN75179 chip (very first scheme here): >>> http://www.datasheetarchive.com/dl/Datasheets-37/DSA-720721.pdf >>> >>> Based on firmware's PIN file, there are following sserial pins on P3 >>> connector: >>> 21 34 IOPort SSerial 0 RXData1 (In) >>> >>> 23 35 IOPort SSerial 0 RXData2 (In) >>> >>> 25 36 IOPort SSerial 0 TXData1 (Out) >>> >>> 27 37 IOPort SSerial 0 TXEn1 (Out) >>> >>> 29 38 IOPort SSerial 0 TXData2 (Out) >>> >>> 31 39 IOPort SSerial 0 TXEn2 (Out) >>> >>> >>> I have connected RXData1 and TXData1 to my converter, all the >>> remaining pins are not connected anywhere. >>> >>> Is this correct? >>> How can I test the communication between 7i43 and 8i29 cards, to see, >>> if that convertor is actually working? >>> >>> On 8i20 card 4 LEDs are shining: >>> Pwr >>> Lv status >>> Iso pwr >>> Fault >>> >> >> SSERIAL will not start a 8I20 unless the 8I20 has its drive enable powered >> and >>>~45V motor power. (newer 8I20 firmware does allow starts under these >> conditions) > >I have 55 VDC on motor power inputs and 12 VDC on enable inputs, but >still all the same. >What else am I missing? >Can anyone suggest, how can I test, if my diy ttl <--> rs422 converter >is working correctly? > >Viesturs > >------------------------------------------------------------------------------ >This SF email is sponsosred by: >Try Windows Azure free for 90 days Click Here >http://p.sf.net/sfu/sfd2d-msazure >_______________________________________________ >Emc-users mailing list >Emc-users@lists.sourceforge.net >https://lists.sourceforge.net/lists/listinfo/emc-users > > > ------------------------------------------------------------------------------ This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
