michel

yes, I understand this but the problem is that the available software components are of no use if you want to communicate through (for example) a PIC controller. I can't put MX Components into a PIC controller and call it's i/o functions. Anyway, the QBASIC program suits me, so problem is solved.

YES! That's it! QBASIC, the good old times Wondering where the programmer got the info from, I can't find anything about this protocol elsewhere. Already installed a port sniffer to get the required info. But a ready-made QBASIC program is about 100 times better Thanks! >> just tested, program works! Question, is this comm different from QnA series?

Hi, is it possible to communicate through the FX programming port to retrieve (for example) a specific data register? I know it can be done in GX developer, but suppose I want to make my own software to communicate through this port, what protocol to use? Is that easy? I would like to make a simple terminal (with a pic controller or something) that plugs into the programming port and reads or sets data registers.

Hi, if you want to save money on a cable, you have another three options: 1) Connect the USB2RS-232 converter NOT through an SC-09 cable, but hook it up according to Sergei's diagram http://forums.mrplc.com/index.php?showtopic=609 2) Buy a USB2RS-422 converter and connect wires to mini-din. Sergei's diagram is a good reference for that. 3) Buy an after market SC-09 cable from China, there's a canadian ebay seller selling those for $50 or something. If your USB2RS232 cable works in Vista, you can pretty much say that the USB SC09 cable will also work because it is nothing more than a virtual COM port, just as the USB2RS232 converter. Michel

Hi, yes, that's right but I am talking about 2 different applications. For 1 I need at least 12 high speed inputs, the other only 2, or actually 4 because I want to connect 2 sensors to it. The product speed I calculate by use of the 2 sensors that are 12.5mm apart. I measure the time difference between detection on sensor 1 and sensor 2, then 12.5mm divided by the measured time gives me the product speed. At least, that's the idea. I did a bit of testing using a high speed ring counter (0.1ms increments), I clear the counter when 1st sensor is reached and let it count until second sensor is reached. That works well in theory, but the current PLC I am using is too slow to get it accurate, but that's a minor issue. I have 2 of these 32 point input units now eating dust, so I think I am going to the hardware modification anyways to see how that performs together with a Q2A. If that works fine, I am thinking of an FX3UC as they seem to match the performance of the Q2ASHcpu-S1 quite well. Any idea? Michel

Hi, I made a dual sensor for a cut-to-size wire straightener, the dual sensor measures the speed of the wire over a 12.5mm distance. A cut signal will be generated according to the speed of the wire. The cut signal has a variable delay, I put it into a formula that includes cut-time and wire speed. So if the cut-time is known and the speed of the wire is also known, the end result is wires that always have the same length (approx +/- 1mm over a 4.5m length). The speed of the wire varies between 0.5m/sec and 2.0m/sec. That leaves us with 6.25ms to 25ms between the 2 sensors that are 12.5mm apart. That's not a lot to work with, so the inputs have to be very quick. 0.1ms would be ideal. Michel

Hi, if the fans are controlled as "on or off" there's not much use to use accurate PID controlling for that. Just watch your analog signal and add another fan according to the value. For example: Fan1 = AD > 500 Fan2 = AD > 750 Fan3 = AD > 1000 Would that be sufficient? Michel

Hi, The A1SX81 is a 32 point input module, the response time (on and off) is 10ms. I would like to get it down to 1ms. Has anyone ever tried opening the module and take some capacitors out? Or is there another way of doing so? Michel

Hi Guys, the cable drawing as posted by Rajsiyer is not 100% correct. On my FX2-48 it didn't work, so I tried to figure out why? First of all, he connected pin 6 to GND (pin 7), however GND is on pin 7 and 8 leaving pin 6 unconnected. That's not a real problem b.t.w. The reason that the cable doesn't work is simple, there's a resistor from pin 3 (DB25) to VCC. However, this resistor should be between pin 2 and VCC to keep the TXD+ (which is the PLC's RXD+) at VCC level. There's no point of connecting pull-up resistors to the PLC's communication channel outputs (in this case pin 3). Hope this will help anyone who doesn't want to spend $$$ on an SC-09 cable. Michel

Hi Guys, I find this in the ladder diagram, what does it actually do? |-----||-----[D-P D2510 K150000 D2010]-| It's probably a data move instruction, but how does it work exactly? Is it like (D2510 - 150000) move to D2010 or something? (active for 1 scan) Thanks! Michel

Yes, and the S1 has PID control feature, so basically it's more advanced but anything that the Q2ASH has will be available is the S1 as well, right?

Hi, Does anyone know if I can replace a Q2ASHCPU for a Q2ASHCPU-S1 without changing anything to the program? Regards, Michel

Ok..... it's that easy huh? That looks very much like a MAC <--> PC cable. The main difference is that you connect RXD+ via a resistor to the +5V (which is NOT an RS-422 level), the MAC cable suggests to connect it to CD (carrier detect) which (I assume) is +12V. Hummm, I may try both of them and leave my current SC-09 cable untouched! Thanks! Michel (I don't speak french by the way)

I got a SC-09 cable with a 25 pin DSUB connector (PLC side), I would like to know if I can make a simple -extension cable to communicate via the mini-din connector. So, a 25d sub to the 8 pin mini-din. Has anyone ever tried that??