6. Function blocks
6.1 Manufacturer function blocks
6.1.6.3 SC - Synchronizing clock via NET
General
easyE4 base devices provide exactly one function block SC01
(Send Clock).
This function block allows you to selectively place the date
and time onto the network. All other NET stations accept the
date and time of the transmitting station and set their device
real-time clock accordingly.
Operating principle
If the function block's trigger coil is activated, the current date, day of the week, and
time of the transmitting station will be sent to the NET network. The transmitting sta-
tion will perform this operation as soon as the seconds counter of the device's real-
time clock goes through zero to the next minute. The other stations accept this value.
This process can be repeated as often as desired. In this case, the function block
input trigger coil must be changed from a state of "0" to a state of "1" again.
Accuracy of time synchronization
The maximum time deviation between the functional stations is 5 s.
The SC function block only functions if the NET is running properly.
easyE402/24 MN050009ENEaton.com
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