ProSoft Technology MVI71-DNP - Manual (Page 82)

MVI71-DNP ♦ PLC Platform Reference
DNP 3.0 Master/Slave Communication Module
Page 82 of 172 ProSoft Technology, Inc.
August 23, 2007
Data Type Start Block # Max Block # Max # of Points
IED Analog Input 1060 1075 960
IED Analog
Output 1080 1095 960
Float Input 1100 1107 240
Float Output 1140 1147 240
Reserved Block Numbers
Block Number Function/Description
249 or 9949 Read Slave Communication Error Table block
250 or 9950 Read Command Error List Block
251 DNP Slave Status/Error Block from module
252 DNP Error List Block from module
253 or 9999 Cold Boot Request from PLC (Block contains no data)
254 Dummy Block: Used by module when no data is to be transferred
255 or 9998 Warm Boot Request
258 or 9958 PLC Binary Input Event data (FUTURE)
259 or 9959 PLC Analog Input Event Data (FUTURE)
270 or 9970 Set PLC time using module's DNP time
271 or 9971 Set module's time using PLC time
297 or 9901 CROB Control Block for Digital Outputs
299 or 9902 Command Control Block (Add command to Command List Queue)
9903 Event message block from module to processor (Master Driver)
Blocks 1 through 149 transfer data between the module and the processor.
Blocks 1000 to 1148 transfer the initial output databases (binary and analog
output data) from the processor to the module at startup. Blocks 9958 to 9999
are used for command control of the module. Each group of blocks are described
in the following topics.
Module DNP Protocol Operation
Unsolicited Messaging
If the module is configured for unsolicited messaging, the module immediately
sends an unsolicited response out Port 1 (Primary DNP port) informing the
master of a module restart. The module will not log events or process any data
read operations from the master until the master clears the restart IIN data bit.
The master must also synchronize the time with the module before events are
generated if the module is so configured. The master is also responsible for
enabling the unsolicited message facility in the module by sending the Enable
Unsolicited Messaging command to the module.