User's Manual

51 EKI-1351/EKI-1352/EKI-1521/1522/1524 User Manual
Chapter 3 Configuring Serial Device Server
 Host Idle Timeout: 10~255 second. The default vale is 10 second. The main
purpose of Host Idle timeout is when the idle happens and continues more than
the set value, the utility will cut off the connection between serial device servers
and the host automatically. You must re-connect to recover the communication.
EKI serial device server provides Multi-access function through one Ethernet
connection path or dual Ethernet connection path. Allow the max. of five connections
to open one serial port simultaneously. In the mode, all connection have 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, EKI serial device sev-
ers will operate in “normal mode”. When multiple hosts open the serial port
simultaneously, the EKI serial device server 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 simultaneously. Every host
can transmit data to the same serial port, an
d EKI serial device server 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 EKI serial device server receives data from serial
port, the data will also be transmitted to the connected hosts simultaneously.
Note This operating mode is especial suitable for that one major host send the
command and others hosts just listen the data from serial port. If two of con-
nected hosts send the command at the same time, it is possible that EKI
serial device server will not handle the command and will response the incor-
rect data.