GEK-106426B
MIB High Impedance Bus Differntial Relay
A-7
APPENDIX A
A.3 SYNCHRONIZATION
A
A.3SYNCHRONIZATION
To synchronize the date and time of a relay we use a command with the following characteristics
:
1.
The command is executed in broadcast mode (relay address =
00H)
2.
Date and time are included in the message. The date and time format length is 6 bytes
.
3.
No answer is expected from the relay
.
Example
:
The following date and time will be sent: 31st of May 1999, at 10.01:04.224, this is 107,690,464,224 milliseconds from the
base date/time:
107,690,464,224 Decimal = 00 19 12 DA 13 E0 Hexadecimal.
Reordering to send the lowest weight byte first: E0 13 DA 12 19 00
:
FIELD
LENGTH
Relay address
1 byte (00H – broadcast)
Function
1 byte (10H)
Beginning address
1 word (0000H) (High Byte – low byte)
Number of registers
1 word (0004H) (High Byte – low byte))
Number of bytes
1 byte (08H) (High Byte – low byte))
Value of the registers
Register 1=>Command code (FE 00) (Low byte –
High byte).
Register 2..4=>Date and time
CRC
1 word
ADDRESS
FUNCTION
BEGINNING
#REGS
#BYTES
COMMAND VALUE
CRC
00
10
00 00
00 04
08
FE 00
E0 13 DA 12 19 00 FA9C
