3.4.3
Time synchronization
Time synchronization over IEC 60870-5-103 is supported. This requires that the
IED’s global
Time Sychronization Source
parameter (in
Configuration/Time/
Synchronization/Synch source
) is set to "IEC 60870-5-103" mode. If some other
time synchronization source is configured for the IED, the IEC 60870-5-103 time
synchronization messages are rejected.
3.4.4
Block monitoring
The
Block monitoring
setting parameter prevents the relay from sending Class 1
events. Two blocking modes exist: the relay can keep or discard the occurring Class
1 events during the blocking period. In any case, every Class 1 data object updates its
momentary value with the latest change event. A general interrogation following the
blocking period always reveals the present state of all Class 1 data objects. When
blocking mode is activated, it is reported by the IED with event code Fun 0
(=DevFunType) Inf 20. If the event buffer overflows during “Blocked Keep Events”
mode, the oldest events are retained. The
Block Monitoring
parameter is found in
Configuration/Communication/IEC 60870-5-103/I3C0n
.
3.5
Disturbance recorder file transfer
The IED includes a functionality that converts the IED’s natively captured
disturbance file contents into IEC 60870-5-103 disturbance data. Disturbance files are
also available as standard COMTRADE files through PCM600 or WHMI.
IEC 60870-5-103 disturbance recorder spontaneous Class 1 notification message
(disturbance recorder file directory ASDU 23) can be enabled or disabled via the
setting parameter
DR Notification n
. The default setting is disabled. Purpose of this
notification message is to inform the IEC 60870-5-103 client that the disturbance file
directory has been updated. Usually this means that a new disturbance recording has
been captured and stored by the system. If a disturbance recorder file transfer is not
required from the IED, the notification is also unnecessary.
3.5.1
Disturbance recorder file directory (ASDU 23)
The disturbance recorder files IEC 60870-5-103 identification in the IED is a
sequential 16-bit number starting from 1 at IED reset and incrementing for each new
captured disturbance recorder file.
IEC 60870-5-103 standard defines the disturbance recorder file
identification to be the fault number (FAN), which is the same number
that is generated by ASDU 2 Class 1 events during the same fault. The
IED could theoretically capture several disturbance recorder files
during the same fault, be triggered by a non-protection signal,
triggered externally or triggered periodically. That is why the
Section 3
1MRS759001 A
Vendor-specific implementation
26
615 series
Communication Protocol Manual