ICPDAS GW-7238D User Manual page 17

is normally turned on when the module works in a good condition. When a
error is happened, the ERR LED will blink per 500 ms.
(3) J1939 LED :
It is used to show whether the GW-7238D is transmitting/receiving
CAN messages. The J1939 LED will blink whenever a CAN message is
sending or receiving.
(4) MODBUS LED :
It is used to show whether the GW-7238D is transmitting/receiving
Modbus messages. The MODBUS LED will blink whenever a Modbus
message is sending or receiving.
Table 2-7: LED indication of the GW-7238D
LED Name
Firmware is running
PWR LED
Power Failure
No Error
ERR LED
Error
Transmission
J1939 LED
Bus Idle
MODBUS Transmission
LED Bus Idle
GW-7238D J1939 to MBTCP Server / MBRTU Slave Gateway User's Manual (Ver.1.0, Nov. 2011) --- 17
Figure 2-15: LED position of the GW-7238D
GW-7238D Status LED Status
On
Off
Off
Blink
Blink
Off
Blink
On or Off