working with some allen bradley micrologix 1000 and 1200 plcs that have come in with some new equipment that we just recieved, and trying to become fimiliar with the software.

Could someone tell me if there is a equivalent special memory area such as a always on, alway off, .1sec clock pulse etc. such as there is with the omron plc.

Thanks

In RS-Logix 500 open your program and go to the bottom of the program tree, on the left-hand side. At the very bottom, under DATABASE, select ADDRESS/SYMBOL. Scroll to the S files, like S:X. There are a variety of utility bits, similar to OMRON

thanks

I normally make my own ALWAYS ON and ALWAYS OFF...habit I guess...
Look on page 8 of this PDF:
http://forums.mrplc.com/index.php?act=Downl...s&CODE=02&id=17

But the timer status bit are not exactly "settable" unless you use a real time clock second bit. So seconds in accuratacy is the lowest resolution you can go.

S:4/7 Timebase Status You can use any individual bit of this word in your user program as a 50% duty cycle clock bit. (S:4/0 to S:4/15 are 20ms, 40, 80, 160, 320, 640, 1280, 2560, 5120, 10240, 20480, 40960, 81920....)

You can also go here:
http://plcguide.mrplc.com

click on:
Programming References

There are explaination of the Status Files

thanks
more familiar with omron, but starting to really like the ab line.

I've always liked the Omron Plug n' Play bits, like "Always On", etc. When you have the misfortune of troubleshooting an existing program without any documentation you can still recognize what the original intent of these bits were just by their address themselves, although I think in CX the doucmentation for these comes automacticaly.
The pre-addressed bits in RS-Logix don't seem to be as popular.

no problem ever replacing omron here, last count, we have about 300 of the cqm1h and about a hundred of the older cqm1, plus dozens of the old c60,c28k type stuff, and last count around 200 of the nt20 displays and 75 of the nt30 screens plus a couple of dozen of the nt11 screens (do not like).

For awhile it seemed like the company got on a automation direct swing, it the last two years we recieved a couple of dozen packaging lines with the automation direct plc, but now after only a couple of years, that equipment is already being replaced with a line of packaging machines that use the Allen Bradley Micrologix plc.

Sometimes hard to keep up with all of the different kinds, wish we would keep everything standard.

Actually have one line of packaging machines that has a printer(omron cqm1h), connected to a labeler ( Mitsubishi FX), connected to a automatic boxer (omron c200hx), connected to a automatic caser ( omron cqm1h) and a robotic offload servo pick and place ( Allen Bradley, Festo Servo controllers)

Thank goodness this site is here, or folks like myself would be lost.

chakorules
thanks for the post example of the ab program.

was able to read through it and complete a program for a loadbox that i had to install last night.

everything appears to be working, machine is running.

have posted the example program.