Delta Electronics Programmable Logic Controller DVP-PLC - Manual (Page 516)

9 Application Instructions API 150-199
DVP-PLC Application Manual 9-44
Remarks:
1. Flags and special registers for the built-in RTC in EH/EH2/SV/SA/SX/SC series MPU.
Device Name Function
M1016
Displaying year in
A.D. in RTC When Off, D1319 will display 2-digit year in A.D.
When On, D1319 will display “2-digit year in A.D + 2,000”.
M1017
±30 seconds
correction Correction takes place when M1017 goes from Off to On (reset to 0 when in
0 ~ 29 second; minute pluses 1 and second resets to 0 in 30 ~ 59 second)
M1076 Malfunction of RTC
On when the set value exceeds the range. (only available when the power
is being switched on).
D1313 Second 0 ~ 59
D1314 Minue 0 ~ 59
D1315 Hour 0 ~ 23
D1316 Day 1 ~ 31
D1317 Month 1 ~ 12
D1318 Week 1 ~ 7
D1319 Year 0 ~ 99 (2-digit year in A.D.)
2. How to correct RTC:
There are 2 ways to correct the built-in RTC.
a) By a specific instruction. (See API 167 TWR instruction)
b) By peripheral devices, WPLSoft, the ladder diagram editing software.
3. How to display 4-digit year in A.D.:
a) Normally, the year is only displayed in 2 digits (e.g. 2003 displayed as 03). If you wish the year to be
displayed in 4 digits, please key in the following program at the start of the program.
M1002
SET M1016 display 4-digit year in A.D.
b) The original 2-digit year will be switched to a 4-digit year, i.e. the 2-digit year will pluses 2,000.
c) If you wish to write in new time in the 4-digit year display mode, you can only write in a 2-digit year (0 ~ 99,
indicating year 2000 ~ 2099). For example, 00=year 2000, 50=year 2050 and 99=year 2099.