Hi,

I'm thinking of using RB450 as a RS232 Server ( just like Moxa ) to be able to connect to the Mitsubishi FX3G PLC.
I have already read that RS232 in this Routerbard does not support hardware flow control ( RTS, CTS pins ).
What about DTR and DSR signals ?
In order to connect to FX series PLC's I just need GND, RX, TX, DTR and DSR pins.
Is it possible on RB450 ?

Of course I can but theres a lot of projects in which we do not use Ethernet module and rs232 port is always available - built in the main unit.

So, what about those DTR, DSR pins? Are they availble in this RB?

I don't think this is going to work.
The RS232 connection on the RB only gives you serial connection to the management interface of RouterOS.
I don't think you would be able to read/write any tcp/ip data to/from the PLC

I've never used it myself, but there's special login, which allows to access connected serial device over network.

Hi,
any update on this argument?
Did you success connecting to the PLC?