Technical Guide P92x/EN CT/E11
IEC 60870-5-103
MiCOM P921-P922-P923 Page 111/118
4.8 Disturbance Records (P922 & P923 only)
The disturbance records stored by the relay can not be extracted using the
mechanism defined in the IEC60870-5-103 standard. The relay maintains
compatibility with the VDEW control system by transmitting an ASDU 23 with no
disturbance records at the start of every GI cycle.
4.9 Blocking of Monitor Direction
The relay does not support a facility to block messages in the Monitor direction.
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