User manual

Module Configuration PTQ-104S Rev2 ♦ Quantum Platform
User Manual IEC 60870-5-104 Server for Quantum
Page 60 of 195 ProSoft Technology, Inc.
February 22, 2013
Data
Size
Example
Normalized Measured Value
1 word
Address 100 refers to word 100 in database
Scaled Measured Value
1 word
Address 100 refers to word 100 in database
Short Float Point Measured Value
2 words
Address 50 refers to words 100 and 101 in database
Integrated Total Point
2 words
Address 50 refers to words 100 and 101 in database
Another important concept to understand is the direction of data transfer for the
different data types with reference to the controller. The following illustration
shows the data types (monitored data) that are transferred from the processor to
the module. This monitor data can be read on the IEC-870-5-104 network.
The next diagram shows the movement of control data from the module to the
processor.
As blocks are transferred between the module and the processor, each block
contains block identification codes that define the content or function of the block
of data transferred. The control blocks used by the module are displayed in the
following table.