Signals - ABB RELION REX640 Technical Manual

Section 3
Basic functions
3.6.1.3
114

Signals

Table 34: SNTP Output signals
Name
ALARM
WARNING
EXTCLKMSTR
Table 35: IEEE 1588v2 Output signals
Name
ALARM
WARNING
EXTCLKMSTR
Type
BOOLEAN
BOOLEAN
BOOLEAN
Type
BOOLEAN
BOOLEAN
BOOLEAN
1MRS759142 C
Description
Alarm status for clock
synchronization
TRUE if the connection to both
primary and secondary SNTP
servers has been lost. "
FALSE if the connection to the
secondary SNTP server is
detected.
Warning status for clock
synchronization
TRUE if the connection to SNTP
primary server has been lost.
Otherwise FALSE.
Status of the protection relay's
clock synchronization
TRUE if the protection relay has
been synchronized by an SNTP
server.
FALSE if the clock has not been
synchronized by an SNTP
server.
Description
Alarm status for clock
synchronization
TRUE if the current master's
accuracy is not within 1µs or
priority1 is bigger than that of
first secondary's. Also TRUE if
the external master was lost and
the protection relay itself acts as
a master. Otherwise FALSE.
Warning status for clock
synchronization
TRUE if a previously connected
and stored primary master has
been lost. Otherwise FALSE.
Status of the protection relay's
clock synchronization
TRUE if the protection relay has
been synchronized by an
external master.
FALSE if the clock has not been
synchronized by an external
master.
REX640
Technical Manual