Chapter 6 FBD Block Diagram Programming
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RTC Mode 4(30-second adjustment)
The 30-second adjustment Mode 4 allows the Bxxx (Rxx) coil to activate based on week, hour, minute and
second. The below examples show for selection of week, hour, minute and second for the B002 (R01) coil to
activate ON, and 30-second adjustment then B002 (R01) OFF.
Example 1: adjustment preset second < 30s
FBD display
Parameter display
Enable Input
→
←
Current time
RTC Parameter
→
←
Adjustment preset
value
Note: Parameter display current time: week, hour, minute and second;
Parameter display adjustment preset value: week, hour, minute and second.
※
The present time will be 8:00:00 when it achieves 8:00:20 at first time, and RTC status bit B002 (R01) will
be ON. RTC status bit B002 (R01) will be OFF when the present time achieves 8:00:20 at second time. Then
time continuous going. So, this means that RTC status bit is ON for 21 seconds.
Example 2: adjustment preset second >= 30s
※
The present time will change to be 8:01:00 when it achieves 8:00:40, and RTC status bit B002 (R01) turns
ON. Then time is gonging on and B002 (R01) turns OFF. This means that the RTC status bit will be ON for one
pulse.
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