AMOSi:Serial Open
an example can be found on AMOSPro_Examples:Examples/H-4/Help_46.AMOS
Opens a communication channel to a serial device.
Serial Open channel, port_no
channel holds the channel number from 0 to 3.
port_no specifies the logical device number of the serial port. Normally, it should be set to zero.
If you need additiona control over the serial port, you can also call an extended version of this instruction.
Serial Open channel, port_no,shared, xdisabled, 7wires