ProSoft Technology MVI56-101S - Manual (Page 111)

MVI56-101S ♦ ControlLogix Platform Reference
IEC 60870-5-101 Slave Communication Module User Manual
ProSoft Technology, Inc. Page 111 of 193
August 2, 2011
The relationships between the data types and the read and write data areas of
themodule are displayed in the following diagram:
The Write Data Area is used to hold data for the 101S Monitored Point
databases, which is data that will be sent by the 101S Slave driver from the
module to the remote Master. The Read Data Area is used to hold data for the
101S Control Point databases, which is data that has been sent from the remote
Master to the 101S driver to be stored in the module. The read and write areas
can be placed anywhere in the module's database. Because the module address
of each point is defined individually, the data area for a specific data type need
not be contiguous in the module’s memory. However, most users find it
convenient to keep data of each type in contiguous address blocks.
Module error/status data can be passed to the Master using the M_ME_NB_1
database. In the database definition for the type, establish a point for each status
value to be monitored by the Master and set the module's database address for
the point in the definition.