Acnodes FES 8730 - Manual (Page 51)

 Serial Port 3 Configuration
Serial Port
Use this item to enable or disable serial port 3. The optimal setting for base I/O
address is 258h and for interrupt request line is IRQ11.
Change Settings
Here are the options for your selection; Auto, IO=258h; IRQ=11;, IO=240h;
IRQ=10,11,12;, IO=248h; IRQ=10,11,12;, IO=250h; IRQ=10,11,12;, IO=258h;
IRQ=10,11,12;, IO=260h; IRQ=10,11,12; IO=268h; IRQ=10,11,12;.
Transmission Mode
Use this item to configure serial port 3. Here are the options for your selection;
RS232, RS422, RS485.