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User Manual
GFK-2849A
If the ECM850 cannot connect to an IED, the ECM850 logs a Loss of Device fault in its local
log table and provides the information to the RX3i CPU controller fault tables. The ECM850
periodically attempts to establish communications with IED.
subsequent connect/configuration attempts is successful, the ECM850 logs an Addition of
Device fault for that IED in its local log table and provides the information to the RX3i CPU
controller fault tables.
Note:
Clearing the RX3i CPU Configuration
If the programmer clears the configuration for an RX3i CPU containing a ECM850, the
ECM850 clears its configuration (excluding non-volatile parameters, which are retained),
closes all opened IED connections, and turns OFF its CONN LED.
3.4
Advanced Configuration for IEC 61850 Client
Several advanced configuration topics for the IEC 61850 Client are described in this section:
report control blocks for buffered and un-buffered reports, plus the configuration of the
Client's Originator Category.
3.4.1
Report Control Block (RCB) overview
The IEC 61850 Client gets the data from the server device using polling technique by default.
The definition of RCB control block optimizes the communication by using an event-based
communication. This functionality is for supporting – "Unsolicited" communication or
"Report by Exception" mechanism of updating data for IED variables.
URCB (Un-buffered Report Control Blocks)
An Un-buffered Report Control Block (URCB) is associated with a DATA-SET. URCB data is
sent immediately to the connected IEC-61850 Client. If the transport data flow is not fast
enough to support the movement of this data, some may be lost. The IED can have multiple
instances of the URCB data and manages the separation of the instances to the IEC-61850
Clients.
a.
b.
BRCB (Buffered Report Control Blocks)
A Buffered Report Control Block (BRCB) is associated with a DATASET. BRCB data is queued
up, or buffered, in the IED and sent sequentially to the ECM850 client. The size of the buffer
is defined by the IED. A BRCB is used so that data will not be lost due to communication
control or loss of connection. There are procedures required around the reporting, and the
IED may only report to one client.
a.
b.
Configuration
It may take up to 5–30 seconds for the ECM850 to establish a connection to an IED, including
one that previously existed, but was lost.
The un-buffered reports are sent to the client and destroyed immediately by the
server after sending without any acknowledgment.
The server sends a block immediately after value or quality change.
The BRCBs are sent to the client till the reception of an acknowledgment from the
client.
They are re-sent as long as the client accepts them.
Chapter 3
Oct 2019
When one of these
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