Vertical communication
Vertical communication describes communication between the monitoring devices
and protection and control IEDs. This communication includes sending of changed
process data to monitoring devices as events and transfer of commands, parameter
data and disturbance recorder files. This communication is implemented using
explicit messages.
Events and indications
Events are sent to the monitoring devices using explicit messages (message code 44H)
with unacknowledged transport service of the LonTalk protocol. When a signal is
changed in the IED, one message with the value, quality and time is transmitted from
terminal.
Binary events
Binary events are generated in Event function blocks EVENT:1 to EVENT:20 in the
IEDs. The EVENT function blocks have predefined LON addresses. Table
the LON addresses to the first input on the EVENT function blocks. Addresses to the
other inputs on the EVENT function block are consecutive after the first input. For
example, input 15 on EVENT:17 function block has the address 1280 + 14 (15-1) =
1294.
For double indications, only the first eight inputs 1–8 must be used. Inputs 9–16 can
be used for other types of events at the same EVENT block.
Three EVENT function blocks EVENT:1 to EVENT:3 running with a fast loop time
(3 ms) are available as basic in the IEDs.. The remaining EVENT function blocks
EVENT:4 to EVENT:9 run with a loop time of 8 ms and EVENT:10 to EVENT:20 run
with a loop time of 100 ms. The EVENT blocks are used to send binary signals,
integers, real time values like analogue data from measuring functions and mA input
modules as well as pulse counter signals.
16 pulse counter value function blocks PCFCNT:1 to PCFCNT:16, and 24 mA input
service values function blocks SMMI1_In1 to 6 – SMMI4_In1 to 6 are available in the
IEDs.
The first LON address in every EVENT function block is found in table
Table 737:
LON adresses for EVENT functions
Function block
First LON address in
function block
EVENT:1
1024
EVENT:2
1040
EVENT:3
1056
EVENT:4
1072
EVENT:5
1088
EVENT:6
1104
EVENT:7
1120
EVENT:8
1136
Table continues on next page
Section 18
1MRK502052-UEN B
Station communication
1004
Technical manual
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