Greetings all; > I hooked it up like I had the other, but when powered up it displays a > 4 digit error code. Rapidly blinking. But the only error code table in > the back of the booklet only shows 2 digit errors with the left > digit=0. > That turn out to be its frequency display, non zero because the knob as at a random position.
I have now rearranged the hook up so that the GND is only used for spindle -. There is only a small AC voltage, couple volts between the GND and XGRB terminals when powered up, but there is no DC continuity between them when powered off. The open circuit voltage at the FWD and REV terminals is a fraction over 16 volts, which should not hurt the opto's on the 7i76, as evidenced to their pulling down to .600 volts when enabled at the opto's outputs. Spindle + is the vfd supplied 10 volts for the external pot supply, and Vin is the arm of the synthetic pot in the 7i76D. XGRB, is I assume the ground bus for the FWD/REV terminals, which are the enable + with enable - connected to XGRB. This is brought to .600 volts when LCNC is trying to run it FWD. The REVERSE - on the 7i76D is connected to XGRB, and it too is pulled down to .600 volts if LCNC is trying to run it backwards. Program register P00.01 is start/stop command source, with 0-4 as choices, 0 being the operator panel, and the run/stop works fine, with the knob taking it up to 24k revs at full song. Set it to 1: From external end control Electric machinery, panel STOP key works. Except LCNC doesn't do a thing to it. Set to 2: From external end son control Electric machinery, STOP key disabled. No clue what "end son" means, but LCNC doesn't control it. Set to 3: is rs485 control, untested. Set to 4: By user application program control Electric machinery. Sounds like just what LCNC needs. Doesn't work. You can setup P00.16 so that a different set of contact closures run it at fixed points (I think) set to 2: EF(X3), REV(X4), FWD(X5RUN). Three wire motor control operation Except to make that work, you have to setup what happens for the X3,X4 and X5 preprogrammed operations. Those are separate terminals on the control terminal strip. I can't believe they'd make you jump thru the hoops of programming around 30 more entries just so you can feed it an analog speed, FWD and REV commands. Makes zero sense. Ideas folks? I seem to be fresh out. The other VFD I put on the Sheldon worked OOTB once the registers were set for external control. Humm, on page 11, maybe I'm doing it wrong. I'll do a param upload to the "digital operator" first thing tomorrow. The way I'm reading it, anything I change must be uploaded from the operatot to the convertor, and I haven't been doing it. You must press AND hold the STOP key and press the up arrow to query the convertor, and hold the STOP key while pressing the down arrow to send the update back to the convertor. I wonder if there is an excedrin headache number for that because the convertor is going to need solidly bolted down, the STOP key takes about 20 lbs to push AND hold it. So you have to hang onto it with one hand and I've only two of those. What a PITA this is going to be. If indeed thats it... Beer Thirty and I'm one behind. Got about a third of one sitting here, warm leftovers from last night. Yup, I'm a real alcoholic folks. ;-) Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
