Maple Systems MAPware-7000 - Manual (Page 275)

MAPware-7000 Programming Manual 275
1010-1040, Rev. 02
With 1=Sun…7=Sat
5 Minute Change
Status S00003 Momentarily sets whenever
the minute value in SW14
changes Read Only
6 Hour Change
Status S00004 Momentarily sets when the
hour value in SW13 changes Read Only
7 Date Change Status S00005 Momentarily sets when the
date value in SW10 changes Read Only
8 Month Change
Status S00006 Momentarily sets when the
month value in SW11
changes Read Only
9 Year Change Status S00007 Momentarily sets when the
year value in SW12 changes Read Only
12 RTC battery status S00010 Sets when battery is dead Read Only
17 Invalid RTC date
entry S00019 Sets while an invalid value is
in one of the RTC registers Read Only
36 RTC Status SW0003_02 Sets if the RTC is not working Read Only
Writing the Date/Time
You can set or change the internal RTC using several means:

By entering the local setup menus (see Appendix C – Maintenance and Test Modes)

By using the Set RTC task for a function key or one of the multi-task buttons (see
Chapter 6 – Task Management)

By using the Set Calendar (CLND) instruction in the ladder logic commands (see The
HMC7000 Series Ladder Logic Instructions Manual)
You cannot directly write to the clock using the SW10-16 internal system registers. However, if
you wish to write directly, simply use the Numeric Entry object with data registers that are
referenced in the Set Calendar instruction in a ladder logic program.
Internal Battery
The internal battery is used to power the real-time clock (RTC) when the HMC is not powered by
external 24VDC. Normally, the internal battery should be able to provide power to the RTC for
approximately 20 years (@25°C).