User manual

EKI-1521/1522/1524 User Manual 36
time, the EKI-152X series will disconnect temporarily. When the data comes to the
EKI-152X series, it will reconnect automatically. Users do not need to reconnect.
Enable Time Sharing
The EKI-152X 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 EKI-152X series will operate in “normal
mode”. When multiple hosts open the serial port simultaneously, the EKI-152X series
only offers control ability for the first connected host and provides data communica-
tion function for others. Each serial port supports up to five simultaneous connec-
tions, so multiple hosts can transmit/receive data to/from the same serial port
simultaneously. Every host can transmit data to the same serial port, and the EKI-
152X series will also transmit data to every hosts. When the multiple 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 EKI-152X series receives data from
serial port, the data will also be transmitted to the connected hosts simultaneously.
Round-Robin Mode
Enabling “Response Timeout” parameter, the EKI-152X series will operate in “Round-
Robin mode”. Each serial port supports up to five simultaneous connections, so mul-
tiple hosts can transmit/receive data to/from the same serial port simultaneously.
Every host can transmit data to the same serial port simultaneously, but the EKI-
152X series will process the data communication in order. The EKI-152X series will
process the first host’s request and reply the response to the first host. The EKI-152X
series serial device server can determine the end of the serial acknowledgement via
response timeout. When EKI-152X series serial device server receives nothing from
serial port after the setting of response timeout, the device will reply the acknowl-
edgement to the host and then process the next host’s request. While the connected
hosts are more and “Response Timeout” is long, the process time is much longer.
Frame Break is a very import parameter for Round Robin mode. This parameter is
the smart way to reduce inefficient waiting time and the EKI-152X series can transmit
data more efficiently. Disabling the Frame Break function, the EKI-152X series will
wait “Response Timeout” period, whether the device have transmitted the data. Dur-
ing this period, the commands from hosts will be queued and the EKI-152X series
just processes this command. Enabling “Frame Break”, if the serial port idle is longer
than the “Frame Break” period, the EKI-152X series will assume the communication
is completed and continue the next host’s query. This is an efficient way to reduce the
waiting time and improve the performance.
Auto Connect Peer IP
If enabling this option, EKI-152X series will connect to TCP/IP which are set at Peers
page automatically after boot up.
Peer Number