Single Event Record Structure; Single Event Record Reading - ABB Relion 620 Series Protocol Manual

1MRS757645 B
3.4.9.1
3.4.9.2
620 series
Communication Protocol Manual
buffer the different clients are reading at the moment. Clients are identified either by
the serial port from where the requests are issued or by the client's IP address in the
TCP/IP network. Up to 25 different IP addresses, belonging to both registered and
unregistered Modbus clients, can be memorized by the IED.

Single event record structure

The Modbus event record structure is located at addresses 49251...49262.
Table 26: Event record structure
Address Register
49251 Event selection
49252 Sequence Number
49253 Unread records left
49254 TimeStamp
(Year,Month)
49255 TimeStamp (Day,
Hour)
49256 TimeStamp (Min, Sec)
49257 TimeStamp
(Milliseconds)
49258 Event type
49259 Data Object ID 1
49260 Data Object ID 2
49261 Data Value
49262 Data Value
The event record can have two different data object identification alternatives. The
data object can be identified by the Modbus address on which the object resides or it
can be identified by a unique id which is platform dependent.
The identification alternative is selected with the Modbus parameter Event ID.

Single event record reading

As long as there are unread Modbus events available for the Modbus client in
question, bit 0 of Modbus SSR3 register remains "1".
Events are read in two steps. First, the client writes a selection code to the Event
selection register at location 49251. The selection code defines the type of read
operation that the client wants to perform. The selected event record is loaded by the
IED into the following 11 registers from 9252 to 9262. Second, the client reads out the
11 registers in one multiple register read operation.
Vendor-specific implementation
Values
1...4 and -1...-499
0...65535
0...499
0 or UID high word
Modbus address or UID low
word
Modbus data value
Section 3
Comment
Write register
High byte:year, low byte:month
High byte:day, low byte:hour
High byte:min, low byte:second
Word: milliseconds (0...999)
See separate description
See separate description
Value into which object has
changed
Additional data
49