Appendix A Time Sync Implementation; Table A-1: Timing; Table A-2: Unix Time Registers - GE Kelman MULTITRANS User Manual

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.
A.1 Time Format
Under the standard Modbus® register list, the timing is defined in Table A—1.
Register Permissions
1200
1201
R/W
1202
1203
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.
A.2 UNIX® Epoch register
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.
Register Access
Flags
1197 rg2,wg2
1198
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.
MA-003 – MULTITRANS User Guide – Rev 3.0
Appendix A
Table A—1: Timing
Group
Size
UTC Clock: Years
UTC Clock: Months, days
4*
UTC Clock: Hours, minutes
UTC Clock: Seconds, Day of week
(0-6, 0 Sunday)
Table A—2: UNIX time registers
Version Storage
Class
1.12.2 RAM
Time Sync Implementation
Description
Effect Name
After
immediately RTC_UNIX
_TIME
18-Jan-16
Data
Format
YYYY (BCD)
MMDD (BCD)
HHMM (BCD)
SSWW (BCD)
Description
Current Time
UTC in UNIX
format
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Data
Format
32-bit
integer