ProSoft Technology MVI69-101S - Manual (Page 105)

Reference MVI69-101S ♦ CompactLogix or MicroLogix Platform
IEC 60870-5-101 Slave Communication Module
ProSoft Technology, Inc. Page 105 of 149
March 16, 2009
Mode D
To select the Mode D. configure the Freeze Start Type parameter as "N". For this
mode the master would periodically send Counter Interrogation Commands to
perform the freeze operation. After the values are frozen the module will return
the counter points as events. The counter points must be properly configured for
counter interrogation groups for Mode D operation.
The following illustration shows a typical communication example when the Mode
D is selected during unbalanced mode operation:
Monitor Points Addressing
As discussed before, the monitor points must be configured in a database area in
the MVI69-101S module.
The monitor data types are described in the following table.
Data Type Data Size Addressing Type
M_SP_NA 1 bit Bit
M_DP_NA 2 bits Bit
M_ST_NA 1 byte Byte
M_ME_NA 1 word Word
M_ME_NB 1 word Word
M_ME_NC 2 word Double-Word
M_IT_NA 2 word Double-Word
M_SP_NA and M_DP_NA
The monitored single-point (1 bit) and monitored double-point (2 bits) types both
occupy bit-addressing. For example, if you configured the following points:
# Point # DB Address Group(s) IV DB Bit
# ------- ---------- -------- -------------
START
100 1600 80000000 0
101 1601 00000200 0
102 1602 00000400 0
END