Omron NT620C, Operation Manual

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5-6 Section Clock Function
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5-6-4 Notification of the Date and Time to the PC
The date and time set at the NT620S/620C can be notified to the PC. The numer-
al memory tables numbered 247 through 253 are used for display. They cannot
be allocated to PC areas.
The method used to notify the date and time is copying between memory tables.
Numeral memory tables
Copy
NT620S/620C PC
DM0000
DM0001
0
1
247
248
DM0000
DM0001
DM0002
Second
Minute
Hour
DM0002
2
249
Second
Minute
Hour
Second
Minute
Hour
DM
Procedure 1. Allocate an area in the PC to the numeral memory tables (number corre-
sponding to the data to be read) that are to be made the copy destination.
2. Copy the contents of numeral memory tables 247 to 253 to the numeral
memory tables allocated as the copy destination in step (1).
The copied date and time is notified to the area in the PC.
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Important points concerning numeral memory tables used for the clock func-
tion
Numeral memory tables 247 through 253 store clock data which is updated by
the internal clock of the NT620S/620C. This data cannot be rewritten by the
PC.
Numeral memory tables 247 through 253 are exclusively for display (read
only). Do not attempt to write data to them by using numeral settings or by co-
pying between memory tables.
Do not allocate the numeral memory tables to which the clock function is as-
signed (numbers 247 to 255) to PC words.
Example of Reading the Time Set for the NT620S/620C
This is the procedure for reading the time (hour, minute) set for the
NT620S/620C.
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Settings with the support tool
The following settings are made using the support tool.
PT status control area: CH0100
Numeral memory table No. 258: DM0000 (one registered word)
Numeral memory table No. 259: DM0001 (one registered word)