Chapter 4 - 7SR45 Data Communications Definitions
© 2018 Siemens Protection Devices Limited
Chapter 4 Page 14 of 20
The following table describes the fields in the event record.
Key
Description
FUN
Function Type, as defined for IEC870-5-103.
INF
Information Number, as defined for IEC870-5-103.
DPI
Measurand Event with Relative Time, values 1 = OFF, 2 = ON.
ms L
Time Stamp Milliseconds low byte.
ms H
Time Stamp Milliseconds high byte.
Mi
Time Stamp Minutes (MSB = invalid, time not set > 23 hours).
Ho
Time Stamp Hours (MSB = Summer time flag).
RT L
Relative Time low byte.
RT H
Relative Time high byte.
F# L
Fault Number low byte.
F# H
Fault Number high byte.
Meas
Measurand format R32.23, sent least significant byte first.
The following tables show the fields in the different event records as they are returned.
Byte
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Content
1
0
FUN INF DPI
0
0
0
0
0
0
0
ms
L
ms
H
Mi
Ho
Event Type 1 Format.
Byte
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Content
1
0
FUN INF DPI RT
L
RT
H
F #
L
F #
H
0
0
0
ms
L
ms
H
Mi
Ho
Event Type 2 Format.
Byte
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Content
1
0
FUN INF
Meas
0
0
0
0
ms
L
ms
H
Mi
Ho
Event Type 4 Format.
5.2.6
EVENTCOUNT
The EVENTCOUNT register contains the current number of events in the relay's event buffer.
On reception this register should be interpreted as a 16 bit integer.
5.2.7
TIME_METER
The TIME_METER register contains the device's time. The time must be read or written in one
step; therefore the quantity should be 4 registers. Failing to do this will result in an exception
code 2. The time format is 8 bytes as follows.
The following table describes the fields in the time.
Key
Description
ms L
Time Stamp Milliseconds low byte.
ms H
Time Stamp Milliseconds high byte.
Mi
Time Stamp Minutes (MSB = invalid, time not set > 23 hours).
Ho
Time Stamp Hours (MSB = Summer time flag).
Da
Time Stamp Days
Mo
Time Stamp Months
Ye L
Time Stamp Years low byte
Ye H
Time Stamp Years high byte (Not Used).