I am doing RS-485 half duplex communication by LE-2100 and OP-2B. I am only able to transmit data.
LE-2000/LE-2100 with OP-2B cannot simulate RS-485 half duplex communication. (You can monitor it.) LE-1200/LE-2200/LE-3200/LE-7200 will be able to simulate RS-485 half duplex communication.