Settings of Serial Interfaces on Box Module

The following describes how to configure the serial interfaces on Box Module. You can also switch the communication method on each serial port on Box Module by the following procedure.

1. Display the BIOS screen. Refer to UEFI BIOS Setup Menu.

2. Select Advanced > Super IO Configuration > Serial Port 1 or Serial Port 2.

3. Select Enabled or Disabled in Serial Port (default: Enabled).

4. Select a communication method in Mode Selection (default: RS485).

5. When a communication method is selected, the subsequent menu changes depending on the selection. The following table shows options and default, and the menu appearing when the option in Mode Selection is selected.

   
   

   [When RS-485 is selected]

   Echo Cancel	Disabled
   	Enabled	Default

   Echo Cancel: Setting of whether or not to receive the data sent by itself (Echo) in a two-wire (half-duplex) communication. The default setting is Enabled (not to receive).

   
   

   [When RS-422 is selected]

   Operation Mode	HMI
   	Normal	Default

   HMI mode: The mode when communicating with external devices, such as PLC, using the control signals of RS-422 (ERA/ERB, CSA/CSB) on Box Module via HMI runtime. These control signals of RS-422 are available only in this mode.

   Normal mode: When using as a general RS-422 that uses only data signals (SDA/SDB, RDA/RDB). The control signals (ERA/ERB, CSA/CSB) cannot be used in this mode.

   
   

   [When RS-232 is selected]

   No subsequent menu appears.




6. Press the [F4] key.

7. Select Yes in the Save & Exit Setup dialog box.

8. The product is restarted.