Mike Davidson

Correct me if I am reading this wrong......But if I am reading the manual right...... The FX series inputs are mapped octally so [MOV K4X010 K4M10] would map out as follows? First Nibble X010->M10 X011->M11 X012->M12 X013->M13 Second Nibble X014->M14 X015->M15 X016->M16 X017->M17 Third Nibble X020->M18 X021->M19 X022->M20 X023->M21 Fourth Nibble X024->M22 X025->M23 X026->M24 X027->M25 Sorry to keep bugging you about this but I want to make sure I've grasped the concept correctly.

Thanks for the explanation, and with your directions I did find the descriptions in the Manual. Mitsubishi should really take a page from Omron concerning their manual layouts and descriptors. It looks like I am going to have to read this thing from cover to cover just to document a fairly simple program (WARNING: Sharp learning curve ahead!).

I opened up a Mitsubishi FX2-64MR PLC and discovered the following line of code. LD M8000 MOV K4X010 K4M10 MOV K2X030 K2M26 MOV K1X004 K1M6 DMOV K8M50 K8Y000 I get that we're mapping the I/O, but what is the signifigance of the constants? (K1, K2, K4, and K8). The manuals I downloaded from Mitsubishi's website are not what I would call user friendly as far as the quirks of their programming language are concerned. I was surprised that GX-Developer does not include a Instruction list help file.

Thankyou for the info, looks like I have some reading to do

I Like the idea of going to ethernet for the primary comm's. My concern is servicing the existing CQM1H's with a serial link, will the NS series support simultaneous servicing of the ethernet link and the serial link?

I have an existing setup on a machine which invovles 2 CQM1H-CPU51 plc's with a Controller Link installed between the plc's. Each plc has an NT-31C attached to it and the controller link allows for some of the local I/O to be accessed by the remote screen. This was installed some years ago and has been very stable. The client is about to perform some serious upgrades and modifications to sections of the machine not presently controlled by the existing CQM1H plc's. Given the physical size of the attached machine I am looking at a remote I/O scheme (leaning towards CompoNet). I had envisioned setting up a CJ series PLC with a couple of CompoNet masters. In addition I would replace the NT-31C's with a pair of NS12's. My question is how should I set up the communication between the NS12's and the CJ plc if I wished to still have the serial link to the existing CQM1H's? I would say ethernet if I was dealing with A-B but am unfamiliar with Omron's ethernet modules. As a further wrinkle for consideration this is actually two machines which are capable of swapping some component's back and forth between them. It would might make more sense to have two CJ series plc's (one per machine) with a link to the individual NS12's and an additional link between the plc's that would allow for the swapping of the movable components.

PLC LAW #45: NEVER LEAVE THE RUN/REM/PROG KEY IN A PLC WHERE EVERY TOM DICK AND HARRIET HAS ACCESS TO THE PLC.

Thanks RobH, Yes that was my first thought as well, the module you highlighted is unfortunately a input only module. I have sent A-D a plea for help E-mail, for some reason their 800 number is not working from up here today, (it used to). This install is at least 10 years old, and I suspect that the module is either obsolete or perhaps a third party creation. Regards, Mike

Hi All, I have an Automation Direct D4-440 PLC which has in addition to some generic Digital I/O, a Pulse Positioner Module U-01PM. Has anyone run across this module, and more importantly, know where I could obtain a user/programming manual for it? Thanks, Mike