ES720.1 - User’s Guide 19
ETAS Hardware Description
3.4 LEDs
3.4.1 Flashing Codes
The ES720.1 is equipped with light-emitting diodes to display the operating state
of the module, the function of individual connections and information about the
measurement. The LEDs are using the following flashing codes:
Flashing code Constant On Constant Off
Flashing code 1 500 ms 500 ms
Flashing code 2 100 ms 1900 ms
3.4.2 Operating State of the Module
On the front side of the device are three light-emitting diodes for the display of
the operating state of the module (see Fig. 3-2 on page 18):
• ON:
power supply and operating mode
• ET
H: function state at "ETH" port
• WL
AN: function state at "WLAN" port
The LEDs ETH and WL
AN show the function states at the assigned connection
in the enabled state of the ES720.1 (operating state "On"). The WLAN LED is
enabled only in versions with WLAN module.
LED Display Description
ON Green Power supply present,
module in operating mode "On"
Flashing green
(flashing code
1)
Module is booting, being shut down, chang-
ing to the state "Standby" or "Off"
Flashing green
(flashing code
2)
Module is in operating mode "Standby", min-
imal current consumption.
A wake-up event is require
d to change to the
"On" state.
Off No power supply
ETH Off No Ethernet connection
Yellow Ethernet connection has been established
Flashing yellow
(code 1)
Communication at the ETH interface
WLAN Off No WLAN connection
Yellow WLAN connection has been established
Flashing yellow
(code 1)
Communication at the WLAN interface
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