Event Reporting; Event Buffers; Command Handling; Automation Bits - Hitachi Relion 670 Series Communication Protocol Manual

1MRK511391-UUS Rev. L
Bit index
IIN2.2
IIN2.3
IIN2.4
IIN2.5
IIN2.6
IIN2.7
3.4

Event reporting

The IED supports unsolicited reports. Given the parameters UREvCntThold1, tUREvBufTout1,
UREvCntThold2, tUREvBufTout2, UREvCntThold3 and tUREvBufTout3, the IED can be configured to
report events either after a number of events of a certain class have been generated or when at least one
event of the class has been generated and the configured time-span has elapsed.
The event system has a rate limiter to reduce CPU load. Each channel has a quota of 10 events/second.
If the quota is exceeded the event channel is blocked until the event changes is below the quota.
3.4.1

Event buffers

Binary input points, double-bit input points, counters and analog input points each have buffer sizes of
1000 events.
3.5

Command handling

DNP3 allows for operation on binary outputs via CROB. Direct Operate, Direct Operate with No
Acknowledgement as well as Select/Operate pairs are allowed. The protocol requires that a pair of select
and operate messages is completely alike and only one sequence number apart. This in turn requires
masters not to send any requests between the selected message and the operate message, otherwise
the operate request will be denied.
Select and Operate requests may contain multiple objects. The select/control buffer size is large enough
to hold 10 of the largest select requests possible.
3.5.1

Automation bits

Automation bit signals can be used to interpret and execute the count, on-time and off-time parameters
of a CROB. Thereby pulse trains of different characteristics and lengths can be generated, and the
outputs from the automation bits component can be connected to other function blocks in PCM600.
DNP, 670 series
Communication protocol manual
Descriptions and conditions
Parameter error. Generally indicates that both function code and object group /
variation could be processed but that the qualifier / range field is in error.
Buffer overflow. Indicates that an event buffer has overflowed, and that change
events, of at least one type, have been lost. Binary event buffer size is 1000.
Counter event buffer size is 1000. Frozen event counter event are not supported.
Analog event buffer size is 1000.
Requested operation is already executing.
Configuration corrupted.
Reserved. Always 0.
Reserved. Always 0.
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Section 3
Vendor-specific implementation
Writable
No
No
No
No
No
No
GUID-881DE1F4-F375-4EE9-88D5-2E227A7A8469 v3
GUID-01A1D3E8-A9FE-4AB1-82E1-AC374D84AA8E v1
GUID-0C671343-CDEE-4030-857B-9B5397F8297D v3
GUID-BF9E3DA5-6C05-4068-A899-577D121856A5 v1
15