Modbus: Determining I/O Mapping to Memory

[@torjemusic2830]

Thanks . God bless your father

[@dipti5457]

Very very useful. Thank you very much

[@EmileAckbarali]

Very welcome.

[@fatimaezzahrahammouch2736]

Thanks for this interesting video ... actually I have this problem, I need the documentation for addressing Modicon M580 PLC ... Could you help me find it

[@EmileAckbarali]

Have you gone on Modicon's website and checked for the documentation? If you did and could not find it, the best thing to do would be to contact technical support to have them send you the documentation.

[@brightside5626]

The things that I got now was waited for years

[@EmileAckbarali]

Thanks very much for your comment.

[@qzorn4440]

automationDirect DL05 plc uses V-numbers which are octal values.. "V2000 octal = 1024 decimal" now to find the memory map modbus equivalent number? what i am trying to do is communicate with an older automationDirect EZ-220P text message display and the Click-PLC with Modbus rtu? need a test message. thanks..:) great video

[@anestid7970]

What happens if 2 devices have the same adress? For example 31000 one and 31000 the other...

[@EmileAckbarali]

If two slave devices have the same address, when the master sends out a read command to slave 31000, both of the slave devices will attempt to answer and this will cause a collision on the RS485 network. The data on the line would be corrupted.

[@kecapmanis4191]

Emile Ackbarali I thought only the slave which has the correct unit Id will response, right? Or perhaps the correct slave Id?

[@sandeepthorvat6395]

sir how can modbus read address write in Schneider TM221 model can me help