Omron NT31 Series, Operation Manuals

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Inputting Character Strings Section 7-15
7-15-6 Clock Function
The NT31/NT31C has a clock function for setting and displaying the date and time.
The clock function is backed up by the built-in battery of the NT31/NT31C.
Reference
- When the battery voltage becomes low, the time data cannot be retained by
turning off the power to the NT31/NT31C, or resetting the NT31/NT31C, conse-
quently the clock function will not operate correctly.
- The NT31/NT31C does not allow display and setting of clock data with the clock
function from the Support Tool. To set the time, use System Menu or numeral
memory table operations.
- No calendar or time data is set on shipment from the factory.
Numeral Memory Tables Used with the Clock Function
The NT31/NT31C uses numeral memory tables No. 247 to 255 for clock data.
As shown in the table below, numbers 247 to 253 are for display and reading only,
and numbers 254 and 255 are for time setting.
Numbers 247 through 253 store clock data which is updated by the internal clock
of the NT31/NT31C. This data cannot be rewritten by the host.
Function
Numeral
memory
table
Digit position Information Value Remarks
Display/
di
247 Second 00 to 59 p y/
reading
only
248 Minute 00 to 59
only
249 Hour 00 to 23 24-hour system
250 Date 01 to 31
251 Month 01 to 12
252 Year 00 to 99 Last 2 digits of the year
253 Day of week 00 to 06 See below.
Setting
l
254 Second 00 to 59 g
only
Minute 00 to 59
DateH
Hour 00 to 23 24-hour system
DateHour
Minute
Se
Date 01 to 31
255
Month 01 to 12
Year 00 to 99 Last 2 digits of the year
Vaca
nt
Year Mont
h
Day of week 00 to 06
nt
Day of
week
h
Vacant 00
The numeric values that correspond to the days of the week are as follows.
Day of week Sun Mon Tue Wed Thu Fri Sat
Value 00 01 02 03 04 05 06
Setting example: March 27 (Fri), 1998, 14:53:30