B&B Electronics GW-7552 - Manual - Manual (Page 16)

GW-7552 PROFIBUS/MODBUS GATEWAY User Manual (Version 1.40, Apr/2012) PAGE: 16
2.5 LED status indicator
The GW-7552 provides three LEDs to indicate the statuses of the GW-7552
module. The position of LEDs and descriptions are shown in table 10 and figure
13.
Table 10: LED status description
LED Name Status Description
flash
When the GW-7552 acts as a Modbus slave device and
receiving query message form Modbus master device,
PWR led will flash.
on
Power supply is ok.
The firmware has loaded.
PWR
off Power supply has failed.
flash
When the GW-7552 connects with the utility tool, it
will flash fast (flash once about 55ms).
When the GW-7552 has diagnostic message, it will
flash slowly (flash once about 220ms).
on
− Connection error between Profibus master and
slave or
− Profibus system has not been configured correctly.
ERR
off
Normal operation
PROFIBUS system has been configured correctly
on
Data exchange mode
Normal operation.
RUN
off GW-7552 module is not in a data exchange mode.