ProSoft Technology inRax MVI69-101M User Manual page 88

MVI69-101M ♦ CompactLogix or MicroLogix Platform
IEC 60870-5-101 Master Communication Module
The data addressing is resumed in the following table:
Data
Single Point
Dual Point
Step Point
Bitstring 32 bit
Normalized Measured
Value
Scaled Measured Value
Short Float Point
Measured Value
Integrated Total Point
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 module to
the processor.
Read Data
The next diagram shows the movement of control data from the processor to the
module. This data is then sent to the controlled devices on the serial networks.
Write Data
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Size Example
1 bit Address 1600 refers to word 100, bit 1 in
database
2 bits Address 1600 refers to word 100, bits 1 and 2 in
database
1 byte Address 200 refers to word 100, lower byte in
database
2 words Address 50 refers to word 100 and 101 in
database
1 word Address 100 refers to word 100 in database
1 word Address 100 refers to word 100 in database
2 words Address 50 refers to words 100 and 101 in
database
2 words Address 50 refers to words 100 and 101 in
database
Input Data Types
M_SP_NA_1
M_DP_NA_1
M_ST_NA_1
M_BO_NA_1
M_ME_NTA_1
M_ME_NB_1
M_ME_NC_1
M_IT_NA_1
Output Data Types
C_SC_NA_1
C_DC_NA_1
C_RC_NA_1
C_SE_NA_1
C_SE_NB_1
C_SE_NC_1
C_BO_NA_1
ProSoft Technology, Inc.
February 4, 2008
Reference