S7200modbus指令库安装程序: 安装后,在库中显示: ModbusMasterPort0(v1.2) ....Mbus_CTRL ....Mbus_MSG ModbusMasterPort1(v1.2) ....Mbus_CTRL_P1 ....Mbus_MSG_P1 ModbusSlavePort0(v1.0) ....Mbus_INIT ....Mbus_SLAVE USSProtocolPort0(v2.3) USSProtocolPort1(