dunc

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About dunc

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  1. we don't tend to use SD cards, but that is a good one to remember for the future.
  2. in GX works; is there any way around reading a structured project from a Q series CPU if the symbolic data (which takes up loads of room) isn't downloaded to the CPU initially? with a simple project you can simply read the program straight to a new project and then work with it. this doesn't appear to be possible with a structured project? siemens and allen bradley can manage this without having a huge CPU for a relatively small program, why cant mitsubishi?
  3. adding signal???

    really odd one. day 3 of trying this and i had another look about. found a utility on the taskbar which allowed you to monitor and change point values. did this with the signal that i was having trouble with and this managed to change the signal. the SCADA button now works as it should? did i miss something when adding the button and me using that utility forced it to work?
  4. adding signal???

    this should be simple and i have done it before with no issues. i simply want to add a button on screen to turn a bit on in the PLC. i added the signal in the point editor and all the settings are the same as a button i have added before. i have added the button on the mimic, done a bit of script to control it as before. i have recompiled the runtime. if i try and use the button, the signal does not change in the PLC. if i force the signal in the PLC, the colour of the button will not change either. everything else works perfectly fine including the button i added in a month or so ago. any ideas what i have missed? im sure its something stupid!   many thanks Duncan    
  5. i wish, i am in a maintenance department. we barely have enough to keep things going, let alone spares to set up a test rig.  everything i do has to be on the live system!!! i have no station number issues when i put them all on the same network, so wouldnt have thought it would be that? did get a chance to get on it last friday as had issues with something else :(   will try again this friday!
  6. yes, everything is 192.168.x.x based. i am not using the gp.read instruction. the system is setup using a function block downloaded from mitsubishi that sets the ip address and the port information only. i am hoping it is something i need to fill in on the network parameter pages, just struggling due to my limited knowledge. having done some extra reading i have a few extra things i can try, only problem is i only get the plant on a friday evening as it is running the rest of the time. will report back on how i get on  
  7. i wish to segment my ip address areas out to free up more available IP addresses and to give some area definition based on the numbers used. i want to keep things simple without messing with dhcp or managed switches as we have limited management resource and a mixture of old and new equipment, some of which wont support dhcp anyway.   i have a network setup via 3 q03ude cpus. i have had no issues so far until i come to the 3 PLCs communicating over a tcp/ip connection via an open port connection on the master plc. 2 of the plcs have the ip address 192.168.3.x but one has the ip address of 192.168.11.x   they will communicate fine if on the same network with the last set of ip address numbers being the unique identifier, just not if i use the last 2 sets of numbers as the unique identifiers, even with a blank subnet mask in the PLC ethernet setting tab (no subnet masking?) with a subnet mask of 255.255.0.0 my pc will pickup all the devices on the various ip address ranges as long as the first 2 numbers are 19.168.x.x which is as expected.   how do i go about getting the tcp/ip comms to work as i want to? the only settings i can adjust on the function block are the ip address itself (in hex) and the port numbers. this is only at the master PLC end. only port numbers can be changed at the slave PLCs. any assistance would be appreciated. i have limited networking knowledge. thanks  
  8. Conveyor belt help (Ladder diagram)

    if it is not a "real life" project you can physically see, then i find it easier to visualize if i draw it out. so draw your tank and conveyor, a temperature sensor etc. once you have drawn it, you can label the inputs/outputs and then work your way from there to achieve the outcome.   as others have said, we are more than welcome to help if you have a go first
  9. TIA PORTAL connect with Mitsubishi FX3U

    probably better off posting that one in the Siemens specific forum section.   if you search google, there are some youtube videos that may be of help.
  10. First time with QS PLC, Starts up in stop

    we had a similar issue with an omron safety plc. when installed they had an issue with a safety input so it would always power up with a fault and not allow the outputs to run the system until reset.. once the safety fault was corrected, it was ok. it could be that something is starting up in a fault condition when you put the power on which is putting the safety plc into stop?  it is hard to suggest a suitable way around this without knowing a bit more about the system. unfortunately, i havnt done much with safety PLCs myself either.
  11. GT Simulator

    what options do you have if you click the drop down menu under option-> connection?
  12. GT Simulator

    on the drop down list where you select GX simulator 2, there should be some other options. i generally just try those and one tends to work.   its probably due to how you install the software or something!?
  13. GT Simulator

    i have had issues with the simulators. they seem to pick and chose what works and what doesnt on each install. have you tried selecting any of the other simulators?
  14. GSM Module using with Mitsubishi Q PLC

    the attached may help. this was using a QJ71C24-R2 module. i am not 100% sure of the radio modem type.   text message.zip
  15. subnetting question?

    I Havnt managed to get back onto it to be honest. thanks for the suggestion. i wanted to keep things simple as IT are not interested in helping (plus they work 9-5 and that is it). i am also the only person on site other than IT that has any networking knowledge. we dont have the resource to manage anything too complicated. like you said, adding extra items onto the network isnt always a simple case of setting the IP address and plugging it in using your above suggestion. if in the middle of the night we had a network issue, i would like everything to be physical unmanaged switches so a like for like replacement is easier for an engineer. in simple terms, if the lights arent working, they can get a new switch out of the stores, plug it in and it works.   i do plan to give it a go at some point, just need to free up some time to allow me to sit down and try it in theory and then in practice without disrupting production. i will let you know how i get on.