User's Manual

55 EKI-1351/EKI-1352/EKI-1521/1522/1524 User Manual

Chapter 3 Configuring Serial Device Server

The “Control mode” provides three modem AT-style commands. The serial devices

can use these commands to control EKI serial device server to connect/disconnect 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 “+”. While EKI serial device server

receive the character from serial port, the server cut off the connection.

 Guard Time: the default value is 1000ms.

The following commands are available for EKI serial device severs.

Command Function

ATDT<IP address> <TCP port>

<CR>

“Forms a TCP connection to the specified host.

Ex: ATDT 192.0.55.22:5201

In above example, the EKI serial device server forms

a raw TCP connection to the networking device

(192.0.55.22). The TCP port is 5201.”

ATA <CR> Answering an incoming call

+++<CR> Returns the user to the command prompt when

entered from the serial port during a remote host con-

nection.

<LF><CR> OK <LF><CR> Commands are executed correctly

<LF><CR> CONNECT <LF><CR> Connect to other device

<LF><CR> RING ddd.ddd.ddd <LF><

CR>

Detect the connection request from other device,

which IP address is ddd.ddd.ddd.ddd.

<LF><CR> DISCONNECT

Disconnect from other device

<LF><CR> ERROR <LF><CR> Incorrect commands

<LF><CR> FAIL <LF><CR> If you issu an ATDT command and can not connect to

the device, it will response “FAIL”.