ProSoft Technology MVI69-101S - Manual (Page 91)

Reference MVI69-101S ♦ CompactLogix or MicroLogix Platform
IEC 60870-5-101 Slave Communication Module
ProSoft Technology, Inc. Page 91 of 149
March 16, 2009
The read and write areas can be placed anywhere in the module's 5000-word
database area. Because each point is defined individually to the module, the data
for a specific type need not be contiguous in the module's database. This means
that the module error/status data area can be passed to the controlling station
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 controlling station
and set the module's database address for the point in the definition.
5.3 IEC-60870-5-101 Protocol Implementation
This section presents an overview of how the MVI69-101S works, while skipping
the complex details of the protocol specification. If you require more information
about the implementation of the protocol, refer to the protocol specification (IEC
60870-5-101 2003). For more information on the configuring and modifying the
backplane implementation of the protocol with the MVI69-101S, refer to
Customizing the Sample Configuration File.
The IEC-60870-5-101 protocol applies to telecontrol equipment and systems with
coded bit serial data transmission for monitoring and controlling geographically
widespread processes.
Any application using the IEC-60870-5-101 protocol will have a master
(controlling station) and one or more slaves (controlled stations). The master will
constantly monitor and control the data from each slave in the network.