ProSoft Technology MVI56-103M - Manual (Page 105)

MVI56-103M ♦ ControlLogix Platform Reference
IEC 60870-5-103 Master Communication Module User Manual
ProSoft Technology, Inc. Page 105 of 152
February 22, 2013
The following fields are used for each 10-word record in the command list:
Word Offset Definitions Description
0 Database Index Address in module to associate with the command.
1 Session Index Session index defined in the module to associate with the
command.
2 Sector Index Sector index for session as defined in the module.
3 Data Type ASDU data type associated with the command.
4 Function Code Function Code for the command.
5 Point Index *
* Information
Number
Information object address for the point on which the
command operates.
6 Override Flag Override flag for general command.
7 Override Value Override value for general command.
8 Reserved Reserved for future use.
9 Reserved Reserved for future use.
The fields shown here are the same as those used in constructing the commands
in the Command List. For a detailed definition of the fields contained in this
block, refer to the Command List (page 39).
There is no response block built by the module to send back to the processor
after the 9901 block is processed. The commands are placed in the command
queue and issued at a high priority.
This block and block 9902 should be used when controlling double-point data
points in remote units using general commands. This provides complete control
of the slave devices under ladder logic control. Alternatively, the slaves can be
controlled by changing data in the database and having the data be transferred
using pre-
constructed commands in the user’s command list. Some points only
accept value of on for control (that is, LED reset or activate characteristic). For
these points, block 9901 and 9902 should only be utilized.