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(4) Changing and reading clock data
(a) Changing clock data
Clock data can be changed either by GX Developer or a program.
1) Changing clock data by GX Developer
Select [Online] [Set time] to open the Set time screen and change the clock data.
2) Changing clock data by a program
Use the DATEWR instruction (instruction for writing clock data) to change the clock data.
Figure 6.12 shows a program for writing the set clock data to D0 to D6.
For details of the DATEWR instruction, refer to the following.
QCPU Programming Manual (Common Instructions)
●When clock data is changed, the clock of 1/1000 second is reset to 0.
●Year data settable by GX Developer is up to 2037.
Figure 6.11 Set time screen
Figure 6.12 Program example for writing clock data
Write request
0
X0
Year 1999
Month 8
Day 10
Hour 11
Minute 35
Second 24
Day of the week
Tuesday: 2
MOVP K1999 DO
MOVP K8 D1
MOVP D2
MOVP D3
MOVP D4
MOVP D5
MOVP D6
DATEWR DO
K10
K11
K35
K24
K2