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LED Indicator
The GW-7552-M module provides three LED indicators, Including
indicators for power status and connecting status. The following is an
overview of the purpose and function of each LED indicator together with
a description.
LED Name
LED
Status
LED Description
PWR
Flash
When the GW-7552-M acts as a Modbus slave
device and receiving query message form
Modbus master device, PWR led will flash.
On
Power supply ok.
The firmware has loaded.
Off
Power supply has failed
ERR
Flash
When the GW-7552-M connects with the utility
tool, it will flash fast (flash once about 55ms).
When the GW-7552-M 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.
Off
Normal operation
PROFIBUS system has been configured correctly
RUN
On
Data exchange mode
Normal operation.
Off
GW-7552-M module is not in a data exchange
mode.
Wiring and Jumper
The GW-7552-M module supports PROFIBUS to Serial Port
communication. It is recommended to use only one serial port (RS232,
RS485 or RS422) of the Gateway at the same time. User may need to
adjust the internal jumpers. (Refer to manual 2.3)