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
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