ProSoft Technology MVI46-103M - Manual (Page 42)

MVI46-103M ♦ SLC Platform Ladder Logic
IEC 60870-5-103 Master Communication Module
Page 42 of 187 ProSoft Technology, Inc.
September 12, 2006
5.2 Data Transfer (U:3)
The data transfer routine is responsible for placing all the output data into the M1
file and for retrieving all the input data from the M1 file. The following two rungs
transfer the data between the M1 file and the user data files. The first rung
transfers monitored data received by the master driver into the user data files.
The following rung transfers the control data from the SLC to the master driver.
The next rung transfers the module's status data to a user data file. A rung to
perform this operation is as follows:
The last rung displays a simple example of retrieving event message data from
the M1 file:
After the data is moved to the user file, word 4200 in the M1 file is set to zero.
This informs the module that the message was received and that more