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
