Register Configuration - ABB Relion 620 Series Protocol Manual

Section 3
Vendor-specific implementation
3.4.5.7
30
Table 12: Time structure data
Address Register
N TimeStamp
(Year,Month)
N+1 TimeStamp (Day,Hour)
N+2 TimeStamp (Min,Sec)
N+3 TimeStamp
(Milliseconds)
N+4 Time quality
Table 13: Time quality register
Bit Meaning
15 Time format
14 Time source
13 RTC not synchronized
12 RTC Failure
11...0 Not used

Register configuration

Measurand registers are mirrored on both 3x and 4x Modbus register areas. Registers
can be accessed in the Modbus Communication Management tool in PCM600, under
tabs: 3x – input registers and 4x – holding registers.
Register values are received from the IEC 61850 system level in two formats.
Measurands are usually received as floating point values and counters as integer
values. The Modbus register values are always presented as integer values. To make
the source floating point value decimals visible in the Modbus register, the received
IEC 61850 value can be multiplied with, for example, values 10, 100 or 1000. The
Modbus register rounds the integer part and truncates all decimals that are left in the
source value.
Values Comment
High byte:year, low
byte:month
High byte:day, low
byte:hour
High byte:min, low
byte:seconds
Word: milliseconds
See the table about
time quality register
Values
0 = Local time
1 = UTC time
0 = Internal (RTC)
1 = Modbus stack
0 = RTC synchronized
1 = Not synchronized
0 = RTC OK
1 = RTC failure
0
Communication Protocol Manual
1MRS757645 B
620 series