- FAQ > Controllers > Programmable Controllers MELSEC > MELSEC-Q Series > Synchronizing the internal clock of a universal model QCPU
Synchronizing the internal clock of a universal model QCPU
How can I synchronize the internal clock of a universal model QCPU with an SNTP server?
- Category :
Answer
- When a built-in Ethernet port QCPU is used
You can synchronize it with the server using the time setting function.
- When a module other than built-in Ethernet port QCPU is used
You can write the correct clock data after the synchronization with SNTP into a programmable controller CPU
using the clock synchronization function of a high speed data logger module.
The following shows a program example.
(1) Set 0H as the start I/O number of the high speed data logger module.
(2) X0B indicates "SNTP time synchronization timing".
(3) Use D0 to D6 as work areas.
(4) The time write delay with the following program example is up to two scan times.
You can synchronize it with the server using the time setting function.
- When a module other than built-in Ethernet port QCPU is used
You can write the correct clock data after the synchronization with SNTP into a programmable controller CPU
using the clock synchronization function of a high speed data logger module.
The following shows a program example.
(1) Set 0H as the start I/O number of the high speed data logger module.
(2) X0B indicates "SNTP time synchronization timing".
(3) Use D0 to D6 as work areas.
(4) The time write delay with the following program example is up to two scan times.
- Product Name
- MELSEC-Q Series
- Series
- CPU