ABB RELION REX615 - Freeze Operation Alternatives; Secure Communication; Secure Authentication Setup

3.6.1 Integrated totals object grouping
The existing IT objects can individually be configured to belong to any IT object
group 1…4. When an IT master command is performed, it can be directed only to a
specific IT object group or to all IT object groups. There are two commands related
to counter groups.
• Freeze counters, C_CI_NA_1 (FRZ) - Freezes/latches momentary counter values
simultaneously and saves them as internal frozen counter values
• Read frozen counters, C_RD_NA_1 (RQT) - Requests the internally saved frozen
counter values
3.6.2 Freeze operation alternatives
A freeze operation can be issued either by a master command C_CI_NA_1
(QCC=FRZ), or by an internal freeze pulse applied to the I5CLPRT function block’s
input IT_FRZ.
The new frozen counter values can be either sent spontaneously to the master, or
they can remain internally in the protocol stack for later reading by the master using
command C_CI_NA_1 (QCC=RQT).
A new freeze operation overwrites the previously stored frozen counter values.
The freeze command operation C_CI_NA_1 (QCC=FRZ) can be defined to be “freeze
only” or “freeze and reset”. In the latter case, the protocol tries to reset the counters
after the value freezing. Some IEC 61850 counters cannot be physically reset. The
counters in this device are globally reset for all possible readers, for example, for
other protocols and for reading via HMI.
Two setting parameters define how the freeze operation is handled.
• Freeze mode defines if the I5CLPRT function block's IT_FRZ input is used, and if
the externally triggered operation is “freeze only” or “freeze and reset”.
• Counter reporting defines what happens after the counters have been frozen.
Frozen counters can be configured for spontaneous reporting with this setting.
The IEC 60870-5 standard terms “memorize” and “memorize and
increment” correspond to “freeze” and “freeze and reset”.
3.7 Secure communication
3.7.1 Secure authentication setup
The relay supports secure authentication based on the IEC 60870-5-7 standard
with symmetric keys. The functionality follows the IEC 62351-5 security standard's
authentication specification, but the “User Status Change” and “Update Key”
functionality is not supported. The relay supports only one predefined user.
Secure application authentication can be used with or without TLS. The secure
authentication is enabled in the relay by the setting parameter Protocol Sec Mode
under Configuration> Communication> Protocols> Secure IEC104 (n)> General.
Vendor-specific implementation
2NGA001859 A
22 REX615
IEC 60870-5-104 Communication Protocol Manual