ProSoft Technology MVI56E-DNPNET - Manual (Page 103)

MVI56E-DNPNET ♦ ControlLogix Platform Contents
DNPNET Ethernet Client/Server Communication Module User Manual
ProSoft Technology, Inc. Page 103 of 140
February 13, 2015
Word Offset
in Block Data Field(s) Description
7 to 10 CLX_Time 64-bit integer number of elapsed microseconds since Jan 1st,
1970
(Next 29 Events)
11 to 18 Month Eight words of data for Event #2
… … ...
235 to 242 Eight words of data for Event #30
(End of Event
data)
243 to 247 Spare Not Used
Up to 30 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 9969 to the ControlLogix processor.
Word Offset
in Block Data Field(s) Description
0 Reserved Reserved
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
This field contains the sequence counter of the last successful
block 9969 received. Used to synchronize and confirm receipt
of the block by the module.
4 to 248 Spare Not used
249 Block ID Identification code for block set to 9969.
The sequence counter field in the returned block is set to the last successfully processed
block 9969 from the ControlLogix processor. Compare this value to that sent by the
ControlLogix processor.
If the values match, the events can be removed from the ControlLogix processor. If the
values do not match, or the ControlLogix processor does not receive a 9969 block, the
ControlLogix processor must re-send the block.
Block 9970: Set CLX Processor Time From Module
This block transfers the module's time to the ControlLogix processor.
Word Offset
in Block Data Field(s) Description
0 Block ID This field contains the value of 9970 identifying the block type
to the module.