Signals - ABB RELION REX640 Technical Manual

Section 3
Basic functions
3.7.3
122
Frequency adaptivity
The FRQ_ADP_WARN output is active when full adaptation to the actual frequency is
not reached or guaranteed. The FRQ_ADP_FAIL output is active when no frequency
source has sufficient amplitude and the nominal frequency window size is used in
measurements. The FRQ_ADP_BU output is active when the backup adaptivity
frequency source is active.
When switching from the main frequency source to the backup frequency source,
there is an interval of 200 ms where the last known frequency is used to determine the
measurement window size. During this period, FRQ_ADP_WARN is activated. This
also happens when no frequency source has sufficient amplitude and the last
frequency is held for 3 s before activating output FRQ_ADP_FAIL.
Special function block outputs
The function block has a few outputs dedicated for special purposes.
Table 48: Special function block outputs
Output
CNF_CHANGE
GRPOFF
DEV_WARN

Signals

Table 49: PROTECTION Input signals
Name Type
BI_SG2 BOOLEAN
BI_SG3 BOOLEAN
BI_SG4 BOOLEAN
BI_SG5 BOOLEAN
BI_SG6 BOOLEAN
MOD_TEST BOOLEAN
MOD_BLK BOOLEAN
Description
Any setting change in the protection relay
activates this output.
Some application function blocks do now allow
unconnected analog inputs. In such a case,
GRPOFF must be connected to such an input.
A protection relay's internal warning activates this
output. For more information, see Warnings under
the Self-supervision section.
Default Description
0 Setting group 2 is
active
0 Setting group 3 is
active
0 Setting group 4 is
active
0 Setting group 5 is
active
0 Setting group 6 is
active
0 Activation of test mode
0 Block test mode
1MRS759142 C
REX640
Technical Manual