8 Communication
8.2 Modbus
145
SICAM I/O Unit, 7XV5673, Device Manual
E50417-H1040-C484-A3, Edition 05.2012
8.2.7.1
Data Type - Date/Time
The
Date/Time
data type is used to transmit the local time. The following format is used:
Date/Time Status
•
10H set: Daylight saving time active
•
20H set: Date/time error (equivalent to FAIL bit in Table 7-1)
Byte 1 (MSB)
Holding register 0065
Byte 0 (LSB)
Milliseconds (0 to 59 999)
...
Byte 3
Holding register 0066
Byte 2
Hours (0 to 23)
Minutes (0 to 59)
Byte 5
Holding register 0067
Byte 4
Month (1 = Jan. to 12 = Dec.)
Day (1 to 31)
...
Byte 7
Holding register 0068
Byte 6
Data/time status
Year (0 = 1900)
NOTE
For the time synchronization via Ethernet, Siemens recommends the use of NTP, see chapter 7.
MAN_SICAM_IO-Unit_7XV5673_US.book Page 145 Thursday, May 10, 2012 10:59 AM