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5-6
Section
Clock Function
230
5-6-3 Date and Time Setting
When the date and time are set from the PC, the contents of the numeral memory
tables numbered 254 and 255 are rewritten. It is possible to use the method of
copying between memory tables to set the time, as shown below.
Reference
- It is also possible to set the date and time by using function key [F3] (Time) on
the “Tool Settings” screen of the support tool.
For details, see the NT-series Support Tool Operation Manual (V028-E1-01).
- It is also possible to set the date and time by using the “Calender & Clock” op-
tion of the I/O Check Menu in the maintenance mode.
- It is also possible to set the date and time by rewriting the contents of numeral
memory tables 254 and 255 using the numeral setting function.
- The maximum clock error per month is +67 seconds to –57 seconds. Periodi-
cally correct the error.
Numeral memory tables 254 and 255 are exclusively for time setting. They can
be allocated to an area of the PC for other uses. It is possible to rewrite the con-
tents of these memory tables by first writing the new setting into tables other than
254 and 255 and then copying it into tables 254 and 255 by using the memory
table copy function.
Date, hour,
minute, second
Copy
NT620S/620C
PC
DM0000
DM0002
Day of week,
year, month
Date, hour,
minute, second
–
–
Day of week,
year, month
0
1
254
255
DM0000
DM0001
DM0002
DM0003
Minute, second
Date, hour
Year, month
Day of week
April 27, 1995
14:53:30
S
Available allocation words
The memory tables can be allocated to the following PC areas.
For time setting, two words have to be allocated for each table.
Symbol
C Series PCs
Allocated
CVM1/CV Series PCs
Allocated
DM
Data memory
f
Data memory
f
CH
Internal/Special Relay
f
Internal/Special Relay
f
TIM
Timer
Timer
CNT
Counter
Counter
HR
Holding Relay
f
–
AR
Auxiliary Relay
f
Auxiliary Relay
LR
Link Relay
f
–
f
: OK
: NG
Since the special auxiliary relays of the CV series PCs are allocated to the sys-
tem, they cannot be used for purposes other than system use.
The range of respective area varies with the type of PC. Refer to Appendix L
“PC Memory Map” (page 327).
Summary of Contents for NT620C
Page 1: ...Cat No V033 E1 5 Programmable Terminals NT620S 620C OPERATION MANUAL...
Page 2: ...NT620S 620C Programmable Terminals Operation Manual Revised April 2001...
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