ProSoft Technology MVI56E-DNPNET - Manual (Page 100)

Contents MVI56E-DNPNET ♦ ControlLogix Platform
User Manual DNPNET Ethernet Client/Server Communication Module
Page 100 of 140 ProSoft Technology, Inc.
February 13, 2015
Word Offset
in Block Data Field(s) Description
2 Sequence
Counter
This field is used to hold the sequence counter for each 9959
block transfer. This is used to synchronize and confirm receipt
of the block by the module.
(Begin Event #1)
3 Point_Number This is the data point in the DNPNET analog input database
represented by the event.
4 Class_Override Regardless of the Class defined for the given point number,
this will be the Class of the event. (1, 2, or 3)
5 to 6 Value Value of the point. 16-bit integer, 32-bit integer, or 32-bit float
can be packed into this space
7 Year Year of the event timestamp
8 Month Month of the event timestamp
9 Day Day of the event timestamp
10 Hour Hour of the event timestamp
11 Minute Minute of the event timestamp
12 Seconds Seconds of the event timestamp
13 Milliseconds Milliseconds of the event timestamp
14 Reserved
(Next 19 Events)
15 to 26 Ten words of data for Event #2
… … …
231 to 242 Ten words of data for Event #20
(End of Event
data)
243 to 247 Spare Not Used
Up to 20 events can be passed from the ControlLogix processor to the module in each
block. To insure that the block reached the module and was processed, the module will
send a response read block 9959 to the ControlLogix processor.
Word Offset
in Block Data Field(s) Description
0 Reserved Reserved(0)
1 Block ID Block identification code for request from PLC by the module.
2 Event Count
Received
This field contains the number of events processed/received
by the module.
3 Sequence
Counter Received
Sequence counter Received for each block transfer, used to
synchronize and confirm receipt of the block by the module.
This field contains the sequence counter of the last successful
block 9959 received.
4 to 248 Spare Not used
249 Block ID Identification code for block set to 9959.