Maple Systems MAPware-7000 - Manual (Page 274)

274 MAPware-7000 Programming Manual
1010-1040, Rev. 02

Initialize keep memory area after download- if checked, the designated Keep Memory
Areas are set to 0 after download is completed. If not checked, the values in the Keep
Memory Areas are retained.

Initialize all device registers except keep memory after download- if checked, the entire
internal tag registers (i.e. D, X, XW, C, T, etc.) memory of the HMC7000 are set to 0 after
download except for any registers designated as Keep Memory. Note: this memory area
is automatically set to 0 if power is removed from the HMC unit. If not checked, values
in these areas are retained, unless power is removed.
Real Time Clock
The internal battery powers 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).
Reading the Date/Time
The Clock objects (Time and Date) are used to display the date and time on an HMC screen.
Each field of the RTC data can also be read and individually displayed on screen by using the
designated system word registers (SW10 thru SW16) in the tag database.
Other reserved registers that pertain to the clock are:
Tag No. Tag Name Tag Address Description Access
42 RTC day of month SW0010 Ex: 1-31, Unsigned format Read Only
43 RTC month SW0011 Ex: 1-12, Unsigned format Read Only
44 RTC year SW0012 Ex: 0-99, Unsigned format Read Only
45 RTC hour SW0013 Ex: 0-23, Unsigned format Read Only
46 RTC min SW0014 Ex: 0-59, Unsigned format Read Only
47 RTC sec SW0015 Ex: 0-59, Unsigned format Read Only
48 RTC day of week SW0016 Ex: 1-7, Unsigned format Read Only