AMRN/AMRX (for Modbus/RTU) and AMTN/AMTX (for Modbus/TCP) controls packages provide a fast, easy way to interface with any Modbus slave connected to a PC’s serial or network ports. The packages are easy-to-use ActiveX. AMRN and AMTN are Windows Forms Controls (.NET) that provide a quick way to communicate with slave devices connected to a PC's serial or Ethernet port. Free evaluation versions are available.