ProSoft Technology MVI71-DNP - Manual (Page 87)

Reference MVI71-DNP ♦ PLC Platform
DNP 3.0 Master/Slave Communication Module
ProSoft Technology, Inc. Page 87 of 172
August 23, 2007
Word Offset in Block Data Field(s) Description
0 Block ID This field contains the value of 9959 identifying the
event block to the module.
1 Event Count This field contains the number of events contained in
the block. Valid values for this field are 1 to 10.
2 Sequence
Counter This field holds the sequence counter for each 9959
block transfer. This synchronizes and confirms
receipt of the block by the module.
3 DNP Analog
Input Data point This is the data point in the DNP analog input
database represented by the event.
4 Analog Input
Value This is the new analog input value represented in the
event.
5 Month/Day Formatted: bits 0 to 4 = Day, bits 8 to 11 = Month. All
other bits are ignored.
6 Hour/Minute Formatted: bits 0 to 5 = Minutes, bits 8 to 12 = Hour.
All other bits are ignored.
7 Sec/Millisecond Formatted: bits 0 to 9 = Milliseconds, bits 10 to 15 =
Seconds.
8 Year Four digit year value for event.
9 to 14 Six words of data for Event #2.
15 to 20 Six words of data for Event #3.
21 to 26 Six words of data for Event #4.
27 to 32 Six words of data for Event #5.
33 to 38 Six words of data for Event #6.
39 to 44 Six words of data for Event #7.
45 to 50 Six words of data for Event #8.
51 to 56 Six words of data for Event #9.
57 to 62 Six words of data for Event #10.
63 Spare Not Used
Up to 10 events can be passed from the PLC to the module in each block. To
ensure that the block reached the module and was processed, the module will
send a response read block 9959 to the PLC. The format of the block is shown in
the following table.
Word Offset in Block Data Field(s) Description
0 Block ID Identification code for block set to 9959.
1 Block ID Block identification code for request from PLC by the
module.
2 Event Count This field contains the number of events processed
by the module.
3 Sequence
Counter This field contains the sequence counter of the last
successful block 9959 received.
4 to 63 Spare Not used