Lon Net Address; Vertical Communication; Events And Indications - ABB Relion 670 Series Communication Protocol Manual

Section 3
LON operation principle
3.1.1.4

LON net address

To establish a LON connection, the IED has to be given a unique net address. The net address
consists of a subnet and node number. This is accomplished with the LON Network Tool by
creating one device for each IED.
3.1.2

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.
3.1.2.1

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 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 2. The formula for
calculating the LON address is:
LON Address = (EVBlkNr-1)×16 + signalNr +1023
For instance, the first pin at Event block number 2 has the address:
Table 2:
Function block
EVENT:1
EVENT:2
EVENT:3
EVENT:4
EVENT:5
EVENT:6
EVENT:7
Table continues on next page
12
LON adresses for EVENT functions
First LON address in
function block
1024
1040
1056
1072
1088
1104
1120
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2 shows the LON addresses to
(2-1)×16 +1 +1023 = 1040
LON, 670 series
Communication protocol manual
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