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5.1.7 If not able to type or not seen any character present in the window, please check
every step from beginning of this procedure.
5.2 Hyper Terminal for COM Port
5.2.1 For RS-485 testing:
It needs two devices to connect the Terminal Block D+ to D+ and D- to D-.
In RS-422/485 setup page: choose RS485.
5.2.2 Sock ports must be different between two devices.
5.2.3 Run HyperTerminal as per RS-232 or RS-422 for two socket ports. Key in any
characters show on the screen of another socket port means the loop test is
successful.