EKI-1351/EKI-1352/EKI-1521/1522/1524 User Manual
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2.1.7
Control Mode
In controlling mode, the EKI serial device server 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 by request, you can use controlling mode.
The controlling mode provides three modem AT-style commands. The serial devices
can use these commands to control EKI serial device server connecting or discon-
necting 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.
2.2
Hardware
In this chapter, we will give you a overview of EKI serial device server hardware and
installation.
2.2.1
LED Indicators
2.2.1.1
EKI-1521, EKI-1522 and EKI-1524
There are LEDs display the power status, network status, and serial communication
status located on the front panel of EKI-1521, EKI-1522, and EKI-1524, each of them
has its own specific meaning as below table.
LED
Color
Status
Description
P1
Green
ON
Power input from first power connector
Off
Power off
P2
Green
ON
Power input from second power con-
nector
Off
Power off
Status
Yellow
Blinking
System ON
Off
System not work
ON
Locate from Utility
LAN(Left side)
Yellow
ON
Link
OFF
No Link
Flash
Active
LAN(Right side)
Green
ON
100M
OFF
10M
TX
Yellow
ON
Serial port data being transmitted
OFF
Serial port no data being transmitted
RX
Green
ON
Serial port data being received
OFF
Serial port no data being received
