Setting Parameters; Setting Bit Masks - ABB REX 521 Operator's Manual

1MRS 751107-MUM
3.2.4.
3.2.5.
Protection Relay
Operator's Manual

Setting parameters

The setting parameters are listed in the CD-ROM
Functions (see "Related documents" on page 6).
1. Navigate to the right parameter using the buttons [
menu chart structure as reference.
2. Activate setting mode by pressing the [E] button.
3. If the default HMI password has been changed, it is now prompted. To enter the
valid password, change the active digit by pressing the buttons [
then set the digit value by pressing the buttons [
4. Once the password has been entered, press the [E] button to confirm. Now the
selected setting value starts flashing.
5. Enter the new setting value using the buttons [
6. Press the [E] button to confirm.
7. If the new value is within the allowed limits, it is now stored in the non-volatile
memory and restored after disconnection of power supply.
8. If an illegal setting value is confirmed, a message in the display tells the user
that the setting is out of range by showing the message Invalid value, and the
previous parameter value remains unchanged.

Setting bit masks

Event masks and switchgroups are presented as bit masks with a checksum. Most of
the events can be included in or excluded from the event reporting by altering the
bits of the event masks. Switchgroups are used for changing the connections of
inputs and outputs to the relay function blocks.
Event mask 1
= E0 0:1
Fig. 3.2.5.-1 Bit mask in setting mode
When navigating in menus containing bit masks, only the checksum is shown. If
setting mode is entered, the single bit presentation (bit 0, value 1, in the example
above) appears in the rightmost lower corner of the display. The contents of the bit
mask may be altered by entering single bit values. However, the new values are not
valid until setting mode has been exited by pressing the [E] button.
1. Navigate to the right parameter using the buttons [
menu chart structure as reference.
2. Activate setting mode by pressing the [E] button.
3. If the default HMI password has been changed, it is now prompted. To enter the
valid password, change the active digit by pressing the buttons [
then set the digit value by pressing the buttons [
4. Once the password has been entered, press the [E] button to confirm. Now the
selected setting value starts flashing.
5. Enter the new setting value using the buttons [
6. Press the [E] button to confirm.
REX 521
Technical Descriptions of
↑ ↓ → ←
], [ ] and [ ], [
←
] and [
↑ ↓
] and [ ].
↑ ↓ → ←
], [ ] and [ ], [ ].
↑ ↓ → ←
], [ ] and [ ], [ ] and the
←
] and [
↑ ↓
] and [ ].
↑ ↓ → ←
], [ ] and [ ], [ ].
] and the
→
],
→
],
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