Advantech ADAM-4570 User Manual

Chapter 3: Installation and Configuration    41

When building up a system, users sometimes face the following
problems. The system crashes because the serial/Host device
breaks down; the application program fails or the cable between
the host device and the ADAM-4570 breaks etc. For keeping
the stability of system, the users usually have to spend lots of
efforts to build up “Redundant” function. Now the ADAM-4570
provides new powerful functions to help users to build up it fast
and easily. Focusing on Host PC, serial device, ADAM-4570,
the new functions are: Host idle switch, device idle switch and
auto-reconnect (refer to Chapter 3.4.4).

Host Idle Switch Mode
When the application program which is running in host PC fails,
the ADAM-4570 and the serial device always “Hang up”. The
data can not be sent to other PC. The purpose of the “Host idle
switch” mode is to prevent this system hang-up from occurring
due to the above problems. If the application program fails, the
ADAM-4570 will cut off the connection between the host PC
and the ADAM-4570. Another PC can then start to access the
same ADAM-4570. Below illustrates the behavior of the
ADAM-4570.