Mitsubishi Gx Developer Windows Vista

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Pass-Through FunctionPlease see below for required drivers and the system requirements to use the pass-through function.Please refer to for installation or settings of the pass-through function.When using the Pass-Through Function by SIMATIC S7 MPI Direct Driver, please refer to.For details about how to connect to the Display, click the hyperlink in the Driver column to open the manual PDF (portable document format) file for that driver.

I was getting intermittent com port errors using the SC09 cable 'an unusable com port has been selected!' Until the cable finally stopped working. I had a spare and it was giving me th same error.

I purchased an aftermarket cable the 'Mitsubishi - USB SC09-FX' through ELSTON SYSTEMS INC./Mr PLC and it has worked fine for a month, but now i'm getting the same error 'an unusable com port has been selected!' While i'm connected to the PLC in monitor mode. Should i be buying a network module for this FX2n and uploading, monitoring program with this? Using Windows Vista with Toshiba laptop. MY winxp laptop finaly broke. Did not have GX Developer when i used this xp computer.

'an unusable com port has been selected!' Have you checked to make sure that no other software is grabbing the com port first without your knowledge and approval? That phrase will be used when something else has grabbed the serial port and won't let the Mitsubishi software access it.

If you have Allen Bradley's RS Linx on your PC, then there's a very high chance that it's loading itself at startup and grabbing every port on the PC for it's own use. After all, why would anyone want to use anything other than AB's software I had to load up various Allen Bradley software packages for a customer a while ago, and it got so bad at grabbing everything, that I decided to do it all using Microsoft Virtual PC 2007 (which is now free and works in XP) to set up a virtual system where all the AB products are installed. This means that my laptop's host operating system stays lean and mean for the Mitsubishi software and RS Linx only operates in it's own virtual drive.

It causes lots of problems that software. Bit naughty really. Ok, let's see if another take on this can help.

He mentioned intermittent problems. 'an unusable com port has been selected!' Customer-centered rules for design of e-commerce websites pdf.

Does indicate problem on the pc side, not the cable or PLC (sorry my bad). It could be user error selecting wrong com port, it could be port snatched by another application, but it could also be driver issue. Some applications install their own driver which replaces original (like RSLinx when using PIC interface). If this is not resolved yet, i suggest testing that port.

First take a look under Device Manager, Ports. See what com ports are installed (is it Com1, Com5 or whatever). You could use even hyper terminal for example and crossover cable (to another com port, which could be on same another PC). Just setup same port settings on both ends (both hyper terminals) and type something to see if it really works. This will rulle out any hardware damage or some other application using the port. If the hardware and driver are ok, check port settings (Transfer-Online in your GX developer).

Click on 'PLC direct coupled setting' and accept change. This will reset connection setup to defaults. Now try 'Connection Test' to see if it works. Note the com port number (PC side I/F), if it is not showing correct COM port of your PC, click on the yellow Serial icon and change the port and then try the 'Connection Test' again. I've seen instances (fortunately very rare) where application got stuck because of loose programming cable and/or timing issues with USB converter (only to be used in emergencies). After closing and restarting application, no connection could be made because thread that belonged to previous instance of the application was still running and monopolizing com port.

This required reboot. If the cause was RSLinx, it is easily resolved by turning off 'run as service' option on it's start panel. Also in the RSLinx driver setup choose manual or on demand startup instead of automatic.

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At least RSlinx has options to turn off the monopolizing ports. I remember using ActiveSync a while ago (it is a MicroSoft product) to update firmware on AB HMI and this was one bad piece of software.

It didn't have option to stop using com port, no uninstal etc. Had to remove it manually.