Clock Function - Mitsubishi Electric MELSEC Q Series User Manual

11.4

Clock Function

This function serves as the integral clock (RTC: Real Time Clock) in the C Controller module.
Clock data of the integral clock can be set and checked (read out) from
module and the user program.
Clock data are used for C Controller system's time management, e.g. event history information of the C Controller
module and intelligent function module.
● File time stamp
OS clock time is used for file time stamp.
Time of the C Controller module integral clock and that of the OS clock may vary, so correct the OS clock time by using
the user program.
(1) Clock operation during power OFF, reset or momentary power failure
Even while the C Controller module is powered off, reset or has failed for longer than the allowable momentary
power failure time, the clock operation continues by the battery inside the C Controller module.
However, the clock data are initialized during the battery less drive. For details of the battery less drive function,
refer to the following.
 Page 190, Section 11.11
(2) Clock data
Clock data are data used by the C Controller module integral clock.
The following indicates the details of clock data.
160
Data name
YY 4 digits (available from 2000 to 2099)
MM
DD 1 to 31 (automatic leap year adjustment)
Hr.
Min.
Sec.
0
1
2
Day of week 3
4
5
6
Q24DHC-V Q24DHC-VG
etting/monitoring tools for the C Controller
S
Description
1 to 12
0 to 23 (24-hour system)
0 to 59
0 to 59
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Q24DHC-LS Q26DHC-LS Q12DC-V