P44x/EN SC/Hb
P442, P444 (SC) 12-
Group 3 45000 - 46999
Group 4 47000 - 48999
In addition to the basic editing of the protection setting groups, the following functions are
provided:
• Default values can be restored to a setting group or to all of the relay settings by
writing to register 40402.
• It is possible to copy the contents of one setting group to another by writing the source
group to register 40406 and the target group to 40407.
The setting changes performed by either of the two operations defined above are made to
the scratchpad area. These changes must be confirmed by writing to register 40405.
The active protection setting groups can be selected by writing to register 40404. An illegal
data response will be returned if an attempt is made to set the active group to one that has
been disabled.
3.8 Date and time format (data type G12)
The date-time data type G12 allows real date and time information to be conveyed down to a
resolution of 1ms. The structure of the data type is shown in
Table 3-1 and is compliant with the IEC60870-5-4 “Binary Time 2a” format.
The seven bytes of the structure are packed into four 16-bit registers, such that byte 1 is
transmitted first, followed by byte 2 through to byte 7, followed by a null (zero) byte to make
eight bytes in total. Since register data is usually transmitted in big-endian format (high order
byte followed by low order byte), byte 1 will be in the high-order byte position followed by
byte 2 in the low-order position for the first register. The last register will contain just byte 7
in the high order position and the low order byte will have a value of zero.
Byte
Bit Position
7 6 5 4 3 2 1 0
1
m
7
m
6
m
5
m
4
m
3
m
2
m
1
m
0
2
m
15
m
14
m
13
m
12
m
11
m
10
m
9
m
8
3 IV R
I
5
I
4
I
3
I
2
I
1
I
0
4 SU R R
H
4
H
3
H
2
H
1
H
0
5
W
2
W
1
W
0
D
4
D
3
D
2
D
1
D
0
6 R R R R
M
3
M
2
M
1
M
0
7 R
Y
6
Y
5
Y
4
Y
3
Y
2
Y
1
Y
0
Table 3-1 G12 date & time data type structure
Where:
m = 0…59,999ms
I = 0…59 minutes
H = 0…23 Hours
W = 1…7 Day of week; Monday to Sunday, 0 for not calculated
D = 1…31 Day of Month
M = 1…12 Month of year; January to December
Y = 0…99 Years (year of century)
R = Reserved bit = 0
SU = summertime: 0 = standard time, 1 = summer time
IV = invalid value: 0 = valid, 1 = invalid
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