ABB Relion 670 Series Technical Reference Manual page 561

1MRK 505 208-UEN B
Technical reference manual
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 385.
Horizontal communication
Network variables are used for communication between 500 series and 670 series
IEDs. The supported network variable type is SNVT_state (NV type 83).
SNVT_state is used to communicate the state of a set of 1 to 16 Boolean values.
Multiple command send function block (MULTICMDSND) is used to pack the
information to one value. This value is transmitted to the receiving node and
presented for the application by a multiple command function block
(MULTICMDRCV). At horizontal communication the input BOUND on the event
function block (MULTICMDSND) must be set to 1. There are 10
MULTICMDSND and 60 MULTICMDRCV function blocks available. The
Section 15
Station communication
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