ProSoft Technology PTQ-104C - Manual (Page 114)

Reference 49TPTQ-104C ♦ 48TQuantum Platform
12TUser Manual 47TIEC 60870-5-104 Client
Event Pass-Through Block Format
The block that is copied from the module to the processor is structured in the
format below. The user must write controller logic to process this data.
Each block can contain up to 4 events. The number of events per block will
typically depend on the rate between how fast the module receives the events
and how fast these can be passed to the processor (typically depends on the
processor scan rate).
Block Format for Read
Block Format from Module (%IW or 3x Register Data)
Word Offset in Block Data Field(s) Description
0 Sequence Counter This field contains a new value each time the
block is handled.
1 Block ID This field contains the block identification code of
9903 for the block.
2 Event Count This field contains the number of events present
in the block. Values of 1 to 4 are valid.
3 to 16 Event 1 Event message
17 to 30 Event 2 Event message
31 to 44 Event 3 Event message
45 to 58 Event 4 Event message
59 to 61 Spare Not used
62 Event count in queue Number of messages left in event buffer
63 Event Overflow Event buffer overflow
The format of each 14 word data region in the block is shown in the following
table.
Word Offset Definitions Description
0 Session Index This field contains the session index used to
define the controlled unit in the module from
which the event was generated.
1 Sector Index This field contains the sector index used to
define the database within the controlled unit
from which the event was generated.
2 COT This field contains the COT for the event
message received from the IED. If the size of the
COT is a single byte, the originator address will
always be zero. The COT is in the LSB and the
originator address is in the MSB.
3 Reserved This field is reserved for future use and is added
here to keep the structure double-word aligned
for all platforms.
4 to 5 Point Index This field contains the point index in the remote
device that generated the event.
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March 4, 2013