93lt1

There is no easy way to do what you are trying to do. The PLC has no way of knowing what it is controlling. The best way, would be to add logic that will track the sequence until sequence complete, then reset. If the sequence does not complete, you can look at the added logic to see where in the sequence the machine stopped. Trying to find out what rung last evaluated as true probably would not lead you to any kind of useful information. As was mentioned earlier, The PLC is scanning the ladder at a fast rate, continuously, regardless of if the machine is running or not.

I use the Autocad add-on all the time on Windows 2000/AutocadLT 2002, and WindowsXP/Autocad (full version) 2002. I haven't had any problems with either. What operating system are you running? Any other out-of-the-ordinary software packages on your machine? Do you have any other Autocad add-ons? It might be time to try an installation repair with the original CD.

I don't know of any tutorials, but a search of the forum here and at http://www.plctalk.net/qanda/ should result in some information.

But seriously, even if you do go with an AB traing class for devicenet, the class content will most likely cover Controllogix (RSLogix 5000) and fairly simple devicenet nodes - I/O blocks and such and they really stress the importance of proper network layout, lengths, power supply, etc. The Controllogix is quite a bit different than the SLC when it comes to the advanced stuff in devicenet. So, you'll still have to figure out a lot on your own.

Was that a question or a statement?

For a number of years now, work has been proceeding to bring perfection to the crudely conceived idea of a machine that would not only supply inverse reactive current for use in unilateral phase detractors, but would also be capable of automatically synchronizing cardinal grammeters. Such a machine is the "turbo-encabulator." Basically, the only new principle involved is that instead of power being generated by the relative motion of conductors and fluxes, it is produced by the medial interaction of magneto-reluctance and capacitive directance. The original machine had a base plate of prefabulated amulite, surmounted by a malleable logarithmic casing in such a way that the two spurving bearings were in direct line with the pentametric fan. The latter consisted simply of six hydrocoptic marzelvanes, so fitted to the ambifacient lunar waneshaft that side fumbline was effectively prevented. The main winding was of the normal lotus-0-delta type placed in panendermic semiboiloid slots in the stator, every seventh conductor being connected by a nonreversible tremie pipe to the differential gridlespring on the "up" end of the grammeters. In addition, whenever a barescent skor motion is required, it may be employed in conjunction with a drawn reciprocating dingle arm to reduce sinusoidal depleneration. Undoubtedly, the turbo-encabulator has now reached a very high level of technical development. It has been successfully used for operating nofer trunnions. From what I can gather, this was written back in the '40s Here's a link.

What are the "major faults"? Processor faults or faults that you programmed?

A typical (legal) industrial motor control has an overload device and an overcurrent device. They are not the same. The overload device is intended to prevent damage to the motor/wiring (and eventually fire) due to a somewhat extended overload condition. The overcurrent protection is intended to shutdown an overcurrent condition such as shorted power wiring or grounded power wiring.

I agree that the power stuff (usually 480V) and control stuff (usually 120V or 24V) should be kept seperate, I was just stating that the NEC really doesn't cover industrial controls in detail.

Actually the NEC says anything under 600V is low voltage. I would think that everything in this panel is less than 600V.

No, I think he means a SLC 5/03. If he had a 5/05, he probably would not need the 1761-net-eni...

Here is a link to the "Micrologix 1200 and 1500 instruction set reference manual": http://www.ab.com/manuals/cp/1762-rm001e-en-p.pdf Here is a link to the "SLC 500 instruction set reference manual":http://www.ab.com/manuals/cp/1747-rm001d-en-p.pdf All (most) of the AB manuals can be found here. I usually use the SLC 500 manual, so I know it is very detailed, and most of the instructions are the same from SLC500 to Micrologix. The micrologix has a few extra instructions. Please post again if this is not what you are looking for.

This is yet another reason I do not like the RIO panelviews. The BTR is overwriting the data. With a DH+ or DH-485 Panelview, the data is only sent on the press of the "enter" button, not continuously. As far as I know, there is no simple solution.

PLC5's are still available and many companies still spec. them. Software: RSLogix5 Cable: depends on the processor type, some PLC5's only have a DH+ connection- physical DB-9 (not to be confused with RS-232), Some have a DH+ and RS-232 port. It would be helpful to know which PLC5 model: 5/10, 5/20, 5/25, etc...

If this the only indirect addressing or if there is only a few like this, MOV the timer acc to a "regular" INT or DINT and use that as a the indirect pointer.