ABB Relion 670 series, Technical Reference Manual

Page: 1016 / 1232

The following type of signals from application functions can be connected to the event
function block.
Single indication
Directly connected binary IO signal via binary input function block (SMBI) is always
reported on change, no changed detection is done in the event function block. Other
Boolean signals, for example a start or a trip signal from a protection function is event
masked in the event function block.
Double indications
Double indications can only be reported via switch-control (SCSWI) functions, the
event reporting is based on information from switch-control, no change detection is
done in the event function block.
Directly connected binary IO signal via binary input function block (SMBI) is not
possible to handle as double indication. Double indications can only be reported for the
first 8 inputs on an event function block.
• 00 generates an intermediate event with the read status 0
• 01 generates an open event with the read status 1
• 10 generates a close event with the read status 2
• 11 generates an undefined event with the read status 3
Analog value
All analog values are reported cyclic, the reporting interval is taken from the connected
function if there is a limit supervised signal, otherwise it is taken from the event
function block.
Command handling
Commands are transferred using transparent SPA-bus messages. The transparent SPA-
bus message is an explicit LON message, which contains an ASCII character message
following the coding rules of the SPA-bus protocol. The message is sent using explicit
messages with message code 41H and using acknowledged transport service.
Both the SPA-bus command messages (R or W) and the reply messages (D, A or N)
are sent using the same message code. It is mandatory that one device sends out only
one SPA-bus message at a time to one node and waits for the reply before sending the
next message.
For commands from the operator workplace to the IED for apparatus control, That is,
the function blocks type SCSWI 1 to 32, SXCBR 1 to 18 and SXSWI 1 to 28; the SPA
addresses are according to table
625 .
Section 17
1MRK505222-UUS C
Station communication
1010
Technical reference manual