Download MELSEC-L CPU Module User`s Manual (Built-In

CHAPTER 7 TIME SETTING FUNCTION (SNTP CLIENT)
7.2
Precautions
(1) Communication timeout
A communication timeout occurs when 20 seconds have elapsed without receiving any response after sending a
time query.
At the time of a communication timeout, the value in SD1270 is FFFFH.
(2) Delay resulted from the time required for communication
A delay occurs and affects the set time as a result of the time spent for communication with the SNTP server
computer. For a high-accuracy time setting, specify an SNTP server computer that is networked as close to the
CPU module as possible.
7
7.2 Precautions
93