can't receive data about serial-comm-tester

[PhilipMur]

You will have to check out the manufacturer protocol to check what bytes the PLC is expecting .

Example :(STX/Class/Instance/Attribute/CRC8 =0x01/0x01/0x01/0x01/6F) and if it needs a checksum at the end to verify the data CRC or some sort of delimiter, use the checksum calc function in this project to see if the CRC is needed etc.

Check your wiring as well to make sure you don't have dodgy hardware/wiring, to check the cable i normally join TX and RX together at the end and the data i send is the data i should receive back.

To be honest if you don't have the protocol it will be very hard to do.

Also industrial hardware normally runs RS485 or RS422 network, not RS232 so i think you might need to get a RS485 to RS232 converter for you PC if you have not do so already.

Philip

[PhilipMur]

I presume what i said previously helped you out in your quest.

Philip M

[rajputyo]

Yes sir i changed the controller and used the checksum calculator and wired the ground cable and it worked thanks a lot

…

On Wed, Sep 2, 2020 at 19:24 Philip M ***@***.***> wrote: I presume what i said previously helped you out in your quest. Philip M — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#3 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AP2HAHCMYEBQR5PQRFAMGRTSDYTPZANCNFSM4QNZ75MQ> .