Advantech ADAM-4571 User Manual page 42

Host Idle Timeout (10 to 255 seconds):
The "Host Idle Timeout" setting monitors the connection between the
host and the device. If the "Host Idle Timeout" setting time is reached, the
device server will release the resources allocated to the port mapping.
This prevents a stalled host from affecting the connective device.
Note The default value of "Host Idle Timeout" is 60 seconds.
The ADAM-4570 series provides Multi-access function through Ethernet
connection path. Allow the maximum of 5 connections to open one serial
port simultaneously. In the mode, all connection has to use the same serial
setting. If one serial setting of these connections is different from others,
the data communication may operate incorrectly.
There are two operating mode of Multi-access function. One is Normal
mode; another is Round-Robin mode.
Normal mode:
Disabling "Response Timeout" parameter, the ADAM-4570 series will
operate in "normal mode". When multiple hosts open the serial port
simultaneously, the ADAM-4570 series only offers control ability for the
first connected host and provides data communication function for others.
Each serial port supports up to five simultaneous connections, so multiple
hosts can transmit/receive data to/from the same serial port simulta-
neously. Every host can transmit data to the same serial port, and the
ADAM-4570 series will also transmit data to every hosts. When the mul-
tiple hosts transmit data to the same serial port at the same time, the
received data from Ethernet and the outputs of serial port are mixed.
When the ADAM-4570 series receives data from serial port, the data will
also be transmitted to the connected hosts simultaneously.
Note
ADAM-4570 Series User Manual
This operating mode is suitable for the one major
host send the command and others hosts just lis-
ten the data from serial port. If two of connected
hosts send the command at the same time, it is
possible that ADAM-4570 series serial device
server will not handle the command and will
response the incorrect data.
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