
`
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Applied parameter
Relation
Unit
Crest factor
Val_s=Val_t / 1000
None
THFF
Val_s=Val_t / 100
None
Current K factor
Val_s=Val_t / 100
None
Peak voltage(Secondary side value)
Val_s=Val_t / 10
V
Unbalance factor of Voltage and current
Val_s=(Val_t / 10)%
Percentage
Example:Read A phase Voltage wave peak coefficient,communication reading value
“
Val_t
”
is 1414
at address 0
×
0119,then Val_s
=
Val_t / 1000
=
1414/1000
=
1.414
7.5.4
Voltage/current harmonic data
This series measuring value is read out by Modbus-RTU protocol 0
×
03 command,each item occupy
one word.Relation between communication value and actual value is shown as below
:Val_s=(Val_t /
100)%
Example:Read current third harmonics containing rate of phase A current,communication reading
value
“
Val_t
”
is 157 ,at address 0
×
01D0,then Val_s
=
(Val_t/100
)
%=1.57%
7.5.5
Time
This series measuring value includeyear,month,day,hour,minute,second,is read out by Modbus -RTU
protocol 0×03 command,each item occupy one word,adopt BCD code format.
Example: Read the number of years, MODSCAN in HEX reading mode can be read directly in
the address bar 0X0081
7.5.6Event record
Event record 1- Event record 16 are recorded in chronological order, Event record 1 contains the
data of latest event, Event record 16 contains the data of earliest event.The data format is as
follows
High 8-bit
Low 8-bit
Adress 1
Bit 0(The lowest bit):0 is DO,1 is DI
Bit 7(The highest bit):0 is
disconnected,1 is closed
Serial number of switching capacity
0 is first,1 is second and so on
Adress 2
Alarm type:See 7.1.5
Combined alarmnote
Adress 3
Year
Month
Adress 4
Day
Hour
Adress 5
Minute
Second
Adress 6
Value of the alarm(the smallest is recorded when it is open-phase)
Note:0-Over line voltage、2-Over frequency、3-Under frequency、4-Under power、5-Over power、6-Over
current、7-Under power factor、8-Over voltage unbalance、9-Over current unbalance.
Example:DO1 is alarm of A phase voltage , under voltage alarm occurs in 15 January 22nd