MA-003 – MULTITRANS User Guide – Rev 3.0 18-Jan-16 Page 28 of 30
Time Sync Implementation
Appendix A
The product has a time-sync feature that allows users to synchronize the clock. This
Appendix explains the data format options for the “time sync” and its implementation.
Time Format A.1
Under the standard Modbus® register list, the timing is defined in Table A—1.
Table A—1: Timing
UTC Clock: Hours, minutes
UTC Clock: Seconds, Day of week
(0-6, 0 Sunday)
This R/W (read/write) register is in BCD format (Binary Coded Decimal). Some systems are
not compatible with this data format. *The time registers can be written separately in 5
seconds interval in any order. This feature is available starting TransfixHost v1.12.4.
UNIX® Epoch register A.2
A UNIX Epoch register was added to the host board firmware (v1.12.2) to make systems
integration easier in cases of system incompatibility. Both register formats (BCD & UNIX)
will be maintained in future firmware versions and both affect the same single clock. The
details of the UNIX time registers are listed in Table A—2.
Table A—2: UNIX time registers
Current Time
UTC in UNIX
format
These registers are readable and writable, but should be written together as a single 32
bit value.
A.2.1 UNIX Time Format
The number of seconds from the UNIX epoch time of 1st Jan 1970 00:00.
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