CET Electric Technology
89
Event Value 3
: %Residual Uab
min
/Ull
nominal
, x100
Event Value 4
: %Residual Ubc
min
/Ull
nominal
, x100
Event Value 5
: %Residual Uca
min
/Ull
nominal
, x100
5
Interruption
Starts
See
PQ Log Classification
8 =>
Sub-Classification
1
6
Interruption
Ends
See
PQ Log Classification
8 =>
Sub-Classification
4
Table 5-30 PQ Log Classification
5.9
Log Data Format
5.9.1
Read General Reference Packet Structure (Function Code 0x14)
Modbus function code 0x14 is used to access to the Energy Log, PQ Log, Data Recorder Log and Waveform
Recorder Log. The table below list the file format.
Read Reference Request Packet
(Master Station to iMeter 6)
Read Reference Response Packet
(iMeter 6 to Master Station)
Slave Address
1 Byte
Salve Address
1 Byte
Function Code (0x14)
1 Byte
Function Code (0x14)
1 Byte
Byte Count
1 Byte
Byte Count
1 Byte (NxN
0
+2)
Sub-Req X, Reference Type (0x06)
1 Byte
Sub-Res X, Byte Count
1 Byte (NxN
0
+1)
Sub-Req X, File Number
2 Bytes
Sub-Res X, Reference Type (0x06)
1 Byte
Sub-Req X, Start Address
2 Bytes
Sub-Res X, Register Data
NxN
0
Bytes
Sub-Req X, Register Count
2 Bytes
Sub-Res X+1…
Sub-Req X+1…
Error Check (CRC)
2 Bytes
Error Check (CRC)
2 Bytes
Table 5-31 Read Reference/ Response Request Packet
1)
Start Address = [
Log #X Pointer
/
Log #X Depth
].
2)
The Maximum length for the Register Count should be less than 256 bytes.
3)
In the Request Packet, the
File Number
parameter is used to reference which log to read:
a)
For Interval Energy Recorder Log,
File Number
= 17
b)
For High Speed Data Recorder Logs 1 to 4,
File Number
= 1 to 4
c)
For Standard Data Recorder Logs 1 to 12,
File Number
= 5 to 16
d)
For Waveform Recorder #1 Log,
Data
File Number (.Dat)
= 18 to 145,
Configuration File Number
(.Cfg)
= 146 to 273
e)
For Waveform Recorder #2 Log,
Data File Number (.Dat)
= 274 to 401,
Configuration File Number
(.Cfg)
= 402 to 529.
4)
In the Response Packet,
N
represents the number of logs returned, and
N
0
is the length of a single log:
a)
For Interval Energy Recorder Log,
N
0
= 28 where n is the number of parameters for the Energy Log
b)
For Data Recorder,
N
0
= 72 where n is the number of parameters for a particular Data Recorder
c)
For Waveform Recorder Log,
N
0
= 2
5.9.2
Interval Energy Recorder Log Data Structure
Offset
Property
Description
Format
Note
+0
RO
Parameter 1
INT32
-
+2
RO
Parameter 2
INT32
-
…
RO
…
INT32
-
+2N
RO
Parameter N (N=0 to 5)
INT32
-
+2N+1
RO
High-order Byte: Year
UINT16
0-99 (Year-2000)
RO
Low-order Byte: Month
1 to 12
+2N+2
RO
High-order Byte: Day
UINT16
1 to 31
RO
Low-order Byte: Hour
0 to 23
+2N+3
RO
High-order Byte: Minute
UINT16
0 to 59
RO
Low-order Byte: Second
0 to 59
+2N+4
RO
Millisecond
UINT16
0 to 999
Table 5-32 Interval Energy Recorder Log Data Structure
Note:
1)
Please refer to
Section 5.9.1
for how to retrieve the energy log.
