ARTHUR HOLM ERT 30 User Manual page 12

CONTROLS AND CONNECTORS
LEDs system indicators
LED1: Change the state when a AHnet command is received from the
two RS422 ports (AHnet1 or AHnet2).
LED2: Change the state when the unit receives data from the local
network port (ETHERNET).
LED3: Not used.
LED4:
Change the state when the unit sends a AHnet command when
the automatic AHnet ID configuration is activated (DIP2). The ERT
interface sends commands to the units connected on AHnet1 and
AHnet2 to automatically set-up the AHnet ID on each unit.
RF: Lights up when a mobile or tablet is connected to the unit to control
and set-up the ERT by using the AHlink app.
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