ABB RES670 Technical Manual page 674

Section 19
Station communication
668
• No events
• OnSet, at pick-up of the signal
• OnReset, at drop-out of the signal
• OnChange, at both pick-up and drop-out of the signal
• AutoDetect, the EVENT function makes the reporting decision (reporting criteria
for integers has no semantic, prefer to be set by the user)
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 pickup or a trip signal from a protection function is
event masked in the EVENT function block.
Double indications
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 30, SXCBR 1 to 18 and SXSWI 1 to 24, the SPA
addresses are according to table 504.
1MRK 511 408-UUS A
Phasor measurement unit RES670 2.2 ANSI
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