Kinco-MK
User Manual
2.1.7 Real-time Clock (RTC)
The real-time clock built in the all CPU modules can provide real-time clock/calendar
indication. Users need to use KincoBuilder【PLC】->【Time of Day Clock...】to set the clock
when using RTC first time. Then users can use real-time clock instructions（READ_RTC、
SET_RTC、RTC_W、RTC_R）.
After CPU power off, the real-time clock can be maintained by lithium battery. The life of
battery is 5 years and the retaining duration is 3 years at normal temperature.
The HMI real time (RTC) funcation can provide real-time time/calendar,user can change RTC
from the system Setting , or through register LW10000 - LW10006 to modify time. RTC
can be kept after power off.If precise time is required, user also can set HMI RTC
synchronization with PLC CPU. Please refer to DTOOLS use manual chapter 2.7 RTC Set
(2.7.3 System time and PLC Time synchronization)..
2.1.8 Backup Battery
HMI-PLC can use certain specification lithium battery as backup battery. When the power is
off, the backup battery is only used to supply power to the real-time clock of the PLC to
maintain the operation of the clock, and also to supply power to the RAM for data retention.
The backup battery is removable, user can replace new battery by themselves
when the battery is empty.
The lithium battery is CR2032(3V) with connector. As shown in figure, user
can order the battery separately.
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