rudie
Junior Member level 3
difference between can bus and modbus
Hello guys,
I don't know what to use as communication protocol. On the internet i could find come information about them but not enough. I know that the difference between RS232 an RS485 is mainly that with RS485 you can use a longer cable length. But if i then read somting about MODbus i see that MODbus also uses the RS232 or RS485 communication protocol. The communication with the RS232 and RS485 is always between to units, a receiver and a transmitter. The other ones (Canbus,MODbus and I2C) can let multiple units communicate(master and slave communication) with each other. But what are the main differences between those three? I know that MODbus is mostly used in PLC communication but why? and why not I2C or Canbus?
i hope that someone can explain this to me.
greets Rudie
Hello guys,
I don't know what to use as communication protocol. On the internet i could find come information about them but not enough. I know that the difference between RS232 an RS485 is mainly that with RS485 you can use a longer cable length. But if i then read somting about MODbus i see that MODbus also uses the RS232 or RS485 communication protocol. The communication with the RS232 and RS485 is always between to units, a receiver and a transmitter. The other ones (Canbus,MODbus and I2C) can let multiple units communicate(master and slave communication) with each other. But what are the main differences between those three? I know that MODbus is mostly used in PLC communication but why? and why not I2C or Canbus?
i hope that someone can explain this to me.
greets Rudie