
304 MAPware-7000 Programming Manual
1010-1040, Rev. 02
Appendix B – System Tag Memory
The following table lists all of the internal memory of the HMC7000 which is reserved for
specific purposes.
S memory (System bits)
Overflow indication in math
operations of ladder and
also used in rotate with
carry instruction.
High speed timer
control bit
Enable bit to start high
speed timer
1 for every change in
minute for one scan cycle
1 for every change in hour
for one scan cycle
1 for every change in date
for one scan cycle
1 for every change in
month for one scan cycle
1 for every change in year
for one scan cycle
0: Disable screen saver; 1:
Enable screen saver.
Runtime you can change
this bit
1: Enable Beeper; 0: Disable
Beeper. Runtime you can
change this bit
0: Battery voltage is OK (I.e.
above 2.2 V); 1: Low battery
(I.e. below 2.2 V)
Refresh historical trend
window when set to 1
0: All alarms are
acknowledged; 1: All
alarms are not
acknowledged in the Real
and Historical alarms
1: Enable valid beeper; 0:
Disable valid beeper. Run
time you can change this bit
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