ANNEX 3 MODBUS MEMORY MAP
13-4
MIF Digital Feeder Protection
GEK-106273L
13.3
SYNCHRONIZATION
To synchronize a relay we use a command with the following characteristics:
We execute in broadcast, that is, we send the message to all the units in the network (relay address = 00H).
We include the date and time in the message. The length of the date and time format is 6 bytes, indicating the
number of milliseconds passed from a base date, 1/1/96 at 00:00:00.000.
When we broadcast a message, we do not get an answer from the relay.
FIELD LENGTH
Relay address
1 Byte (00H – Broadcast)
Function
1 Byte (10H)
Beginning
1 word (0000H) (High byte – low byte)
No. of records
1 word (0004H) (High byte – low byte)
No. of bytes
1 Byte (08H) (High byte – low byte)
Value of the records Record1=>Command code (High byte – low byte).
Record2..4=>Date and time.
CRC 1
word
Example
For sending the date and time of the 31
st
of May, 1999 at 10:01:04.224, that is, 107,690,464,224 milliseconds from
the base date/time:
107,690,464,224 Decimal = 00 19 12 DA 13 E0 Hexadecimal.
Reordering for sending the lowest size byte first: E0 13 DA 12 19 00
ADDRESS FUNCTION BEGINNING #REGS #BYTES COMMAND VALUE
CRC
00
10
00 00
00 04
08
FE 00
E0 13 DA 12 19 00 ECFC
Summary of Contents for GEK-106273L
Page 19: ...GETTING STARTED 1 12 MIF Digital Feeder Protection GEK 106273L ...
Page 95: ...SETTINGS 5 38 MIF Digital Feeder Protection GEK 106273L ...
Page 101: ...I O CONFIGURATION 6 44 MIF Digital Feeder Protection GEK 106273L ...
Page 127: ...KEYPAD AND DISPLAY 8 26 MIF Digital Feeder Protection GEK 106273L ...
Page 147: ...INSTALLATION AND MAINTENANCE 10 2 MIF Digital Feeder Protection GEK 106273L ...
Page 199: ...ANNEX 5 HARMONIC FILTERING 15 4 MIF Digital Feeder Protection GEK 106273L ...