ABB REF 542plus, Operator'S Manual, Page: 16 / 134

*
Events: to display protection starts and trips events.
*
Protection: it displays the protection functions installed in the unit, and allows
displaying and changing their settings.
*
Control: it displays the control functions list installed in the unit and allows
displaying and changing their settings.
*
Service: relevant information on the HW and SW configurations and basic
setting of REF 542plus.
*
Tests: to access the test mode for the HMI and the primary objects.
Access to a few submenus is allowed only in some modes.
*
LED bars: The three LED bars are available to show the most relevant
measurements acquired by REF 542plus for a quick inspection of the switchgear
load situation. The three bars are marked M1, M2, and M3. Each bar is
composed of twelve LEDs, ten green and two red ones. The ten green LEDs are
normally dedicated to display between 0% and 100% of the nominal value of the
configured measurement. Each LED corresponding then to 10% of the nominal
value. The two red LEDs indicate an overload condition of 20%. The
measurements displayed by the bars are set with the Operating Tool.
*
Indication LEDs: 8 freely programmable, three-color LEDs are available for
indications. There are 4 pages of these LEDs. As a result, a total of 32 indication
options can be programmed for events and status regarding protection, control,
monitoring, binary inputs and so on. The assignment of the LED to a specific
condition is done with the Operating Tool.
*
Infrared (IrDa) interface: This is the IrDa serial interface port to connect
REF 542plus to a personal computer. By using the appropriate cable and the
Operating Tool, the following actions are possible:
*
Download a configuration into the unit.
*
Upload the current configuration from the unit.
*
After a fault, upload the fault recorder data. This is possible only if the fault
recorder has been previously enabled with the Operating Tool.
Upload other information (measurements, binary inputs status, binary output status).
Do not make any changes to the REF 542plus configuration unless you
are familiar with REF 542plus and the Operating Tool. This might
result in malfunction and loss of warranty.
16
REF 542plus REF 542plus
Multifunction Protection and Switchgear Control Unit
Operator's manual
1MRS755869