CET Electric Technology
68
12506
RO
kvarh Total
INT32
x0.1
kvarh
12508
RO
kVAh Total
INT32
x0.1
kVAh
12510~12515
RO
Peak Demand of kW Total
See Table 5-26
Demand Data Structure
12516~12521
RO
Peak Demand of kvar Total
12522~12527
RO
Peak Demand of kVA Total
Table 5-25 Monthly Freeze Log
Offset
Description
+0
High
Year - 2000
Low
Month
+1
High
Day
Low
Hour
+2
High
Minute
Low
Second
+3
-
Millisecond
+4~+5
-
Peak Demand Value
Table 5-26 Demand Data Structure
Note:
1)
Writing a value N between 1 and 36 to the Index register to retrieve the Monthly Freeze Log of the N
th
entry. For example,
writing 1 to the Index register will retrieve last month’s Monthly Freeze Log. If N = 0 or N > 36, an exception response will
be returned with the Illegal Data Value error code (0x03) as defined by the Modbus protocol. If all the returned values of
the N
th
Log Record (where 1 ≤ N ≤ 36) are all 0 (including the timestamp), this indicates that the returned Log Record is
invalid and that the end of the Log has been reached. If the software is reading the Log for the very first time, it should
start with N=1 and stop when either N=36 or when the returned Log Record is invalid. After that, all the software has to do
is to read the Log on a monthly basis with N=1.
5.9 SOE Log
The SOE Log Pointer points to the register address within the SOE Log where the next event will be
stored. The following formula is used to determine the register address of the most recent SOE event
referenced by the SOE Log Pointer value:
Register Address = 10000 + Modulo[SOE Log Pointer-1/100]*8
Register
Property
Description
Format
10000~10007
RO
Event 1
See Table 5-28
SOE Log Data
Structure
10008~10015
RO
Event 2
10016~10023
RO
Event 3
10024~10031
RO
Event 4
10032~10039
RO
Event 5
10040~10047
RO
Event 6
10048~10055
RO
Event 7
10056~10063
RO
Event 8
10064~10071
RO
Event 9
10072~10079
RO
Event 10
10080~10087
RO
Event 11
10088~10095
RO
Event 12
…
…
10792~10799
RO
Event 100
Table 5-27 SOE Log
SOE Log Data Structure
Offset
Property
Description
Unit
+0
RO
Hi: Event Classification
See Table 5-29
SOE Classification
RO
Lo: Sub-Classification
+1
RO
Hi: Year
0-99 (Year-2000)
RO
Lo: Month
1 to 12
+2
RO
Hi: Day
1 to 31
RO
Lo: Hour
0 to 23
+3
RO
Hi: Minute
0 to 59
RO
Lo: Second
0 to 59
+4
RO
Millisecond
0 to 999
+5
RO
Hi: Reserved
-
RO
Lo: Status
1
-
+6 to +7
RO
Event Value
2
-
Table 5-28 SOE Log Data Structure