joro800 Posted November 12, 2018 Report Share Posted November 12, 2018 Hi. Usb drivers on WIN 7 32bit system recognize PLC " STM32 virtual com(3)", but that's all, U90 give connection error when trying to check device.? Link to comment Share on other sites More sharing options...
MVP 2023 kratmel Posted November 12, 2018 MVP 2023 Report Share Posted November 12, 2018 Is it Jazz new or used (installed with program)? Link to comment Share on other sites More sharing options...
joro800 Posted November 13, 2018 Author Report Share Posted November 13, 2018 New PLC, installed on machine, programmed with basic functions. I want to reprogram it. Link to comment Share on other sites More sharing options...
MVP 2023 Ausman Posted November 13, 2018 MVP 2023 Report Share Posted November 13, 2018 What do the com parameters show by accessing Info mode? cheers, Aus Link to comment Share on other sites More sharing options...
joro800 Posted November 14, 2018 Author Report Share Posted November 14, 2018 Boud rate 9600, 7 data bits, parity even. This PLC have stm32l... mcu, before 6 months i wrote code for virtual com port on stm32f303 without any lib. I don't understand where the problem is in this case, somewhere in protocols maybe.? Мaybe I have to disassemble it and use it for development board...not PLC? Link to comment Share on other sites More sharing options...
MVP 2023 Ausman Posted November 15, 2018 MVP 2023 Report Share Posted November 15, 2018 Checking that you did use "Install USB Driver" .....U90Ladder/Controller/M90 OPLC Settings/middle of bottom buttons? 10 hours ago, joro800 said: Мaybe I have to disassemble it and use it for development board...not PLC? Do you pull your car completely apart if it has simply run out of fuel? Probably not! ? This will likely be something just as simple! cheers, Aus Link to comment Share on other sites More sharing options...
joro800 Posted November 17, 2018 Author Report Share Posted November 17, 2018 On 11/15/2018 at 5:15 AM, Ausman said: Checking that you did use "Install USB Driver" .....U90Ladder/Controller/M90 OPLC Settings/middle of bottom buttons? Yes, i did use it. No solution for now. Link to comment Share on other sites More sharing options...
MVP 2023 Ausman Posted November 17, 2018 MVP 2023 Report Share Posted November 17, 2018 Puzzling. Ensure that the cable is ok....actually try another two. Ensure that the Windows com port settings exactly match those of the plc. I have had instances where things don't work if Windows isn't told, directly at the com port settings, what it should be doing. Failing that, perhaps Uninstall U90 and all associated drivers and start again. cheers, Aus Link to comment Share on other sites More sharing options...
MVP 2023 Ausman Posted November 18, 2018 MVP 2023 Report Share Posted November 18, 2018 Also ensure if you do the uninstall/reinstall to run the install as right click/ run as admin, and once installed also set the .exe to run as admin. Link to comment Share on other sites More sharing options...
joro800 Posted November 19, 2018 Author Report Share Posted November 19, 2018 I tried everything, no success. listening com port for U90 "get version" command protocol, then send it with virtual terminal to PLC, no answer from STM32. PC drivers recognize mcu, problem is not in drivers... Link to comment Share on other sites More sharing options...
MVP 2023 Ausman Posted November 19, 2018 MVP 2023 Report Share Posted November 19, 2018 You keep on mentioning a virtual terminal and command protocol. Is this just a language translation thing, in that it may be your way of describing your connection. So.....Are you using a direct single cable physical connection from your PC to the PLC using U90? Or is it indeed going via a virtual terminal which means the signal is undergoing software translation of some sort, with the possiblity that something is getting lost in the process? If it is a virtual terminal then you need to try it direct. cheers, Aus Link to comment Share on other sites More sharing options...
joro800 Posted November 19, 2018 Author Report Share Posted November 19, 2018 1 hour ago, Ausman said: You keep on mentioning a virtual terminal and command protocol. Is this just a language translation thing, in that it may be your way of describing your connection. So.....Are you using a direct single cable physical connection from your PC to the PLC using U90? Or is it indeed going via a virtual terminal which means the signal is undergoing software translation of some sort, with the possiblity that something is getting lost in the process? If it is a virtual terminal then you need to try it direct. cheers, Aus Direct connection, terminal is only for test.. Link to comment Share on other sites More sharing options...
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