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Chapter 16
NTP server for PLC clock synchronization
16.1 (S)NTP servers
FP Web-Server V2.810 EN
The (S)NTP server function is found on the "Time" tab and is used to
synchronize the PLC clock with a network time server.
For context-sensitive help, highlight the button or entry field (using
<Tab>) and press <F1>.
In most LANs a Network Time Server (NTP or SNTP) is available to
synchronize the real-time clock (RTC) and calendar date of the network
units (computers). Such NTP servers provide accurate world date/time
information in UTC format (Universal Time Coordinate).
The FP Web-Server can request the current UTC time from the NTP server.
Optionally the FP Web-Server can calculate the local time with a daylight
saving time (DST) offset. And then the FP Web-Server can update the
date/time RTC registers within the PLC. The update of the PLC clock can be
done independently of the PLC program in constant time intervals.
NTP server for PLC clock synchronization
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