GRP-530M / GRP-540M User Manual
Version 1.2.1
Page
：
12
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2.5 LED indicators
There are three LED indicators to help users to judge the various conditions of device. The
description is as follows
：
A.
PWR(Green)
：
Power LED to indicate whether the external power is input or not. The
description is as follows:
The external power is active
The external power is not active
on
off
B. RUN(Red)
：
RUN LED indicates if the OS is normal or fail.
Normal
Fail
Heart beat (1 sec.)
Always ON or OFF
C. L1(Green/Red)
：
this Led indicates the status of RTU Client.
Normal
Fail
500ms ON / 500ms OFF
Always ON or OFF
D. L2(Green/Red)
：
reserve.
E.
3G (Red)
：
The LED indicates the status of 3G module.
(the 3G/4G module need about 60 seconds to register network usually)
Registered
3G/GPRS data transmit
Not Register
800ms ON / 200ms OFF
200ms ON, 200ms OFF
200ms ON / 800ms OFF
2.6 Rotary Switch
There are some functions of rotary switch. The description is as follows
：
A. 0 : Normal mode, default position:
B. 9 : Factory default IP. If you set as 9, and then reset the device, its Ethernet IP will be
“192.168.255.1”. If you forgot your device IP, you can use this function to
re-configure your device IP.
