ABB RELION REX640 Technical Manual page 126

Protection and control

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Table of Contents

Basic functions

Table 52: IEEE 1588v2 Output signals

Table 53: IRIG-B Output signals

Table 54: DNP3, Modbus, IEC 60870-5-101/104 and IEC 60870-5-103 Output signals

Table continues on the next page

FALSE if the clock has not been synchronized

by an SNTP server.

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 it-

self acts as a master. Otherwise FALSE.

Warning status for clock synchronization.

TRUE if a previously connected and stored

primary master has been lost. Otherwise

Status of the protection relay's clock syn-

chronization.

TRUE if the protection relay has been

synchronized by an external master.

FALSE if the clock has not been synchronized

by an external master.

Alarm status for clock synchronization.

TRUE if the signal has been lost for a minute.

Otherwise FALSE.

Warning status for clock synchronization.

TRUE if the signal connection is lost.

FALSE if the relay is synchronized to an IRIG-B

Status of the protection relay's clock syn-

chronization.

TRUE if the protection relay has been

synchronized to an IRIG-B master. Otherwise

Alarm status for clock synchronization.

TRUE if the clock has not been synchronized

by the master.

1MRS759142 F

Technical Manual