2012/3/30 Peter C. Wallace <p...@mesanet.com>: > On Fri, 30 Mar 2012, Viesturs L?cis wrote: > >> Date: Fri, 30 Mar 2012 23:27:30 +0300 >> 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 >> >> 2012/3/30 Peter C. Wallace <p...@mesanet.com>: >>> >>> Is your RJ45 pin 3 high? (high than pin 6) if not you likely have the +/- >>> swapped on both RX and TX >>> >> >> Just to make sure that I correctly understand, what do You mean: >> >> Pin 3 is Txa for 8i20, so I have connected to non-inverted input of >> SN75179 chip. I really tried to extra careful to make them right - Tx >> from my converter to Rx of 8i20 and vice versa. >> >> I measured - pin 3 is 3,93 V above GND, pin 6 is 0,96 V above GND. >> >> Viesturs > > Thats correct > > Are you sure you have a straight through CAT 5 cable? >
What do You mean by "straight through"? Label on the cable itself says it is CAT.5E, I cut that piece off the roll and attached rj-45 connector on one end. I paid extra attention to line the wires by colors as per standard (the same as mentioned in 7i44 manual). Yesterday I checked all the wire leads between rj-45 connector and my converter with multimeter - all the leads are connected properly. I tested it by putting one tester pin on rj-45 pins and then attached the other pin to all the pins (one at a time) on converter to check, if there are any short circuits or misconnections. It was all right. 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
