Troubleshooting; Error Messages - ABB REF 542plus Operator's Manual

1MRS755869
16.
16.1.
Multifunction Protection and Switchgear Control Unit
Operator's manual

Troubleshooting

Error messages

Base Unit not responding, communication corrupted or wrong
slave address
When the HMI is not able to communicate with the Base Unit, the following
information appears on the LCD:
Fig. 16.1.-1 HMI is not able to communicate with the Base Unit
Solution:
Check that the Base Unit is powered and regularly working. Look at the status LED
on the connector panel (Slot X7).
The LED close to the analog inputs is related to the watchdog. When the Base Units
is working this LED is on with a weak light.
The other LED is related to the communication with the HMI. When the
communication is properly working, this LED is blinking. When the communication
is not working, the LED can be either ON or OFF. It depends on when the
communication is interrupted.
Check that the connection cable between the HMI and the Base Unit is inserted both
in the HMI and in the Base Unit (Base Unit connector X73 and HMI connector
X20) and properly tighten.
Check the slave address of the connected Base Unit to be polled. The address is
configured in the application file. If you do not know you can enter the following
page by pressing ENTER.
REF 542plus REF 542plus
A051367 2
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