General Monitors TS4000H, Инструкция по эксплуатации, Страница: 77 / 105

TS4000H
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The run time meter indicates that the TS4000H is operating in the time of seconds. The meter
starts at zero second when it is first powered up, updates every second and saves in the non-
volatile memory every 24 hours of the device operating. The meter stops running if the device
power is off, and when the device power is on, it will reload the seconds in the non-volatile
memory.
Second Hi register 0x0051 and Second Lo register 0x0052 are used to read/write the seconds
(32-bit value) from/to the run time meter. The Second Hi contains the upper value of the
seconds and the Lo the lower value, both have ranges from 0 to 65535 or 0xFFFF. The user
must at least write new second value to Lo register in order to get the change affected. Since
the user has written the new value, the meter will run on the new seconds and saves in the
non-volatile memory. Reading two Hi and Lo will return current run time seconds of the meter.
Note that if changing the run time meter, the new seconds will also be converted to year,
month, day, hour, minute and second of the Time/Date clock.
Real Time Clock (RTC) year and month register 0x0053, RTC day and hour 0x0054 and RTC
minute and second 0x0055 are used to read/write the Time/Date clock. Write 0 – 99 to register
0x0053 to change year and month, 1-12 to 0x0054 to change day and hour, and 0-59 to
0x0055 to change minute and second. The user must at least write new minute and second to
RTC minute and second register 0x0055 in order to get the change affected. After changing the
new time and date, the TS4000H unit will be clocked on the new time.
Note that if changing the time and date, this new time will also be automatically converted to
the run time meter seconds since January 1, 2000, the seconds are saved in non-volatile
memory, and the meter will run on the new converted seconds.
5.11 Conversion between Run Time Meter and Time/Date Clock
The internal clock may be set in one of two different ways. It may be set to a time/date format
and unit will automatically convert to the number of seconds since January 1, 2000 for the unit
run time meter. Or, it may be set to the number of seconds since January 1, 2000 and the unit
will do the time/date conversion automatically for the Time/Date clock.
If the Power Cycle Flag is set (1), the time/date structure will be read 00/00/00 until it is reset by
the user. When the clock or run time meter is reset, the Power Cycle Flag will be reset to zero,
and the Power Cycle Flag value is saved in the register 0x0056.
The clock must be reset each time the unit is powered up in order to remain correct. The Power
Cycle Flag will be set to 1 during each power up, and then reset when the time is updated by
the first setting of the clock.
Note that clock value in Date/Time format is meaningless, unless the clock is set to actual time.
This value should be set to zeroes on each power up.
5.12 Event Logging
There are two user scenarios. In one case the TS4000H detector is used as a stand alone
device and all events will be time-stamped with the seconds of the run time meter that
represents the time the unit has been powered-up in service. In this case a time-stamp might
the number of the seconds of service. The other scenario is where the detector is connected to
a host computer system in which case the host can set the detector clock every time it is
powered-up and the time-stamp will be of the form of real time clock Time and Date (e.g.