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1MRS 751108-MUM
Protection Relay
Technical Reference Manual, General
REX 521
In HMI, the state of the alarm LEDs is shown bit-wise starting from the right with
LED1. The LEDs that were activated by writing to parameter Alarm LED
states can be acknowledged by pressing the [C] button for 2 s in the main view.
Clearing a certain LED without affecting the other LEDs can be done by setting the
corresponding bit to 0 in parameter Alarm LED states. Writing to parameter
Alarm LED states from HMI is useful when testing if a certain LED lights up.
4.1.16.2. Writing signal names on alarm LED label
You can write or print the alarm LED signal names on a special label presented in
Figure 4.1.16.2.-1. The transparencies for the label are delivered with the relay. The
label contains eight text rows, one for each alarm LED.
Fig. 4.1.16.2.-1 Alarm LED label
When writing signal names on the label by hand
1. Use the pre-printed transparency.
2. Write the names on the transparency with permanent pen or by typewriter.
3. Put the label in the pocket on the front panel of REX 521.
When writing signal names on the label by using computer
1. Select a template for the label. The templates can be found in Technical
Descriptions of Functions CD-ROM (see “Related documents” on page 7) and
in the Internet address www.abb.com/substationautomation (under Shortcuts,
select the option REX 521 from the Distribution products list box).
• Excel-format template (Label1MRS151301.xls) can be used when you want to
save the signal names for example on the hard disk of your PC.
• Pdf-format template (Label1MRS151300.pdf) can be used when you use
Acrobat Reader®
1
and only want to print the signal names on the label.
1. Acrobat Reader® is registered trademark of Adobe Systems Inc.
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ABB OY
Distribution Automation
1MSC 971082
Alarm LED label
Hälytys-LED kilpi
REX 521
971082
971082
REX_ledlabel
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