Alex R

Worked it out.  Just Click on the "cell" and type away. 

In GX Works 2, I'm wanting to do a Conditional Jump and I need to put a Pointer (P1) into the margin to the left of a rung of ladder logic.  How do I do this?  

Thanks.  Just seen your message.  I have got the scanner to work now: the lead's plug wasn't fully engaged!  Yes, in the end I had done what you said and converted to and from M bits.  Great minds ….

I've plugged in a CodeCorp CR6022 barcode scanner into the RS-232 port on a GS2107 GOT/HMI, which is connected to an FX3S (via RS-422).  The GX Works ladder code that I was given by a colleague (who is now away this week) uses D20.6 and D10.6, but these don't seem to work on FX3S (I think he uses L-Series PLCs).  At the moment I have nothing working (no beam is produced), hence no data is transferred to the HMI/PLC.  Can anyone help me get going on this (with the correct ladder code and PLC & HMI settings)?   

My current system involves a PLC (FX3S) connected to an HMI (GS21**) (via mini-DIN and RS-422) and this is working.  I'm going to add a barcode reader to the RS-232 port.  I've been using the mini-USB to load the programs to the HMI and PLC. I need to also send signals between my system and USB on a PCB (which is then connected to other devices).  Should I be doing this via an HMI with a USB Host?  My HMI only has a mini-USB, so should I buy another HMI (with USB host) or can I use some kind of adapter?

Thanks for your replies on this.  Unfortunately the project that I was describing was put on hold soon after and I hope that it will be resurrected soon.  Fortunately I now have some hardware to play with and am getting to grips with it.

I'm new to PLCs (and I'm a simple Mechanical Engineer).  I've been on a FX/GX Works 2/ladder logic training course but, of course, it hasn't covered everything that I need for my first PLC project.  My first problem is counting high speed pulses; they come on average every 7 ms (but this will vary), and each one is about 0.5 ms long.  Reading up about this suggests that I need to use High Speed Counters C235 etc, running off X0 etc.  I need to store the value of the counter at several times (e.g. at 0.5s, 2s & 2.5s) or the time to set counter settings (e.g. at 50 pulses, 350 pulses & 400 pulses).  Anyone got a bit of sample (ladder logic) code that they could send me to help me get going?  I've tried trawling this site and similar things have been asked previously, but I can't find a suitable piece of code to modify. Thanks, Alex p.s. I haven't got any hardware yet, so not restricted by that. p.p.s. Do these high speed counters not work in Simulation?  I've tried a few examples and can't get the Counters to count.