User manual

EKI-1521/1522/1524 User Manual 34
3.4.4 Setting Control Operating Mode Parameters
The “Control mode” is a very special operating mode. The EKI-1521/1522/1524
presents a modem interface to the attached serial device: it accepts AT-style modem
commands to connect / disconnect to other networking device. If you want serial
device running application program to connect/disconnect to different devices
dynamically, you can use controlling mode.
The “Control mode” provides three kinds of modem AT-style commands. The serial
devices can use these commands to control EKI-1521/1522/1524 to connect/discon-
nect to remote networking device. Thus, intelligent serial devices such as stand-
alone PLC will send /receive data to/from devices one by one via Ethernet.
Please refer to the TCP/UDP server operating mode to setup the Data Listen Port,
Command Listen Port, and Data Idle Timeout.
 Hangup Character: The default character is “+”. After you have connected to
another serial device via EKI-1521/1522/1524, you may need to disconnect.
Then you can use the command "+++" to disconnect. To do this leaves your
keyboard idle (don't press any keys) for at least several seconds, then press "+"
three times. You can set "Guard Time" to define the idle time. Be sure that you
have to press "+" over the idle time.
 Guard Time (ms): The default value is 1000.
For example: <Guard Time> + <Guard Time> + <Guard Time> +