Key issues for RS232/422/485 & Modbus

Hello

I have to write some libraries for four types above.

But I don't have a normal windows computer with a normal serial connection.

I don't see it correct that then can only do "RS232" with this and that amd 422 485 are then "special series cards?"

For me, it seems that 232/422/485 are three different types of material.

And only Modbus is a software protocol that can be created with labview.

Is this correct?

Thanks for help

RS232/422/485 are hardware specific.  A lot of maps RS422 UART there also RS485 deal.  Fortunately, most of these cards present yourself as a COM port, so the software is the same for all 3.

According to Wikipedia, most Modbus devices use RS485 as the hardware layer.  I must confess that I have no experience with Modbus, so I'm not going to offer advice on this.

Tags: NI Software

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