How Connect Two HMIs to Modicon Quantum 140CPU43412A

I want to connect two HMIs on two separate Modbus ports of Moducon Quantum PLC 140CPU43412A. Is it possible to use two serial Modbus ports of this CPU simultaneously?
Any suggestions for brainstorming would be appreciated.
 
I have connected Proface GP2500 HMI to one Modbus Port (which is working fine), I want to connect SIEMENS HMI TP700 Comfort to the second Modbus port.
 
According to the Modicon Quantum PLC 140CPU43412A datasheet (https://www.se.com/us/en/product/download-pdf/140CPU43412A), it has 2 Modbus (RS-232) ports and 1 Modbus Plus port.

The Proface GP2500 HMI's "HOST-I/F" serial interface supports both RS-232 and RS-422 and its "SUB-SIO" serial interface supports RS-232 (https://www.pro-face.com/otasuke/files/manual/gp_hard/GP2500_2600-MT03_eng.pdf).

However, according to the Siemens TP700 HMI datasheet (https://support.industry.siemens.com/cs/pd/127118?pdti=td&dl=en&lc=en-AR) it has only a single RS-422/485 port.

The Siemens HMI only supports RS-422/485 and the Modicon PLC only supports RS-232. I believe you'll need to use a RS-232 to RS-485 converter to connect the two.
 
According to the Modicon Quantum PLC 140CPU43412A datasheet (https://www.se.com/us/en/product/download-pdf/140CPU43412A), it has 2 Modbus (RS-232) ports and 1 Modbus Plus port.

The Proface GP2500 HMI's "HOST-I/F" serial interface supports both RS-232 and RS-422 and its "SUB-SIO" serial interface supports RS-232 (https://www.pro-face.com/otasuke/files/manual/gp_hard/GP2500_2600-MT03_eng.pdf).

However, according to the Siemens TP700 HMI datasheet (https://support.industry.siemens.com/cs/pd/127118?pdti=td&dl=en&lc=en-AR) it has only a single RS-422/485 port.

The Siemens HMI only supports RS-422/485 and the Modicon PLC only supports RS-232. I believe you'll need to use a RS-232 to RS-485 converter to connect the two.
Thanks for the explanation. The Modbus Plus port on this CPU is already RS485, but I have never worked with Modbus Plus. Can I use Modbus Plus port for siemens HMI.
 
No, Modbus Plus is an entirely different protocol from Modbus RTU. The Siemens HMI does not support Modbus Plus.

The best solution is to use a RS-232 to RS-485 converter.
 
Thanks again. I will work with RS232 to RS 485 converter then.
I want to connect two HMIs on two separate Modbus ports of Moducon Quantum PLC 140CPU43412A. Is it possible to use two serial Modbus ports of this CPU simultaneously?
Any suggestions for brainstorming would be appreciated.
Hi I also need to make a modbus serial connection between a Siemens Comfort Panel and a Quantum CPU Is it functioning ? What hardware ar you using to convert the RS485 to RS232 ?
 
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