UniLogic UDFBs
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By Joe Tauser · Posted
Interesting - that is a special OEM controller off an air compressor- https://meiinternational.com/collections/compressor-air-dryer-controllers/unitronics I'm guessing you bought this on eBay or Amazon and can't go back to your supplier for any assistance. You may locked out of uploading, as this is an OEM product. Tell us what driver files the system has assigned to your Gold X USB converter. Hopefully it has the Prolific PL2302 chipset - the FTDI chipset doesn't seem to work too well. @Flex727- the crossover flat cable is needed only if you're using a MJ10-25-cable adapter. If he wired the cable directly then the above connection diagram is correct. Quite frankly the best solution would be to get the Unitronics-approved USB adapter and programming cable. They're not expensive- MJ10-22-CS35 USB adapter RS232-CB1 programming cable What country are you in? Joe T. -
By Joe Tauser · Posted
SCPI commands are just another kind of serial protocol, so the commands themselves aren't a problem. The question is whether or not the USB to GPIB converter will work as a stand-alone gateway or if a driver is needed. Joe T. -
And you're definitely using a 6-wire cable? I think it needs to be a crossover cable, not a straight-through cable (not sure about that though). -
do not have the cable t RS232 to Unitronics RJ11 PC programming cables PCs are normally not equipped with an RJ11 socket for serial RS232 communications. If we want to connect a PC with an Unitronics PLC, for example for programming or debugging reasons, we need a connection cable which is on one side fitted with a female DB9 connector, and on the other side with an RJ11 jack. The layout for this cable is shown below. Unitronics RJ11 RS232 programming cable DB9 RJ11 Function 2 3 RxD TxD 3 4 TxD RxD 4 6 DTR DSR 5 2 + 5 Signal ground 6 1 DSR DTR hat came with the unit used the pin layout provided in the connection chart -
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