LG M4720C Owner's Manual page 77

Controlling the Multiple Product
RS-232C
Transmission / Receiving Protocol
35. Time (Command : f a)
► Set the current time.
Transmission
[f][a][][Set ID][][Data1][][Data2][][Data3][Cr]
[Data1]
0 : Monday
1 : Tuesday
2 : Wednesday
3 : Thursday
4 : Friday
5 : Saturday
6 : Sunday
[Data2]
0H to 17H (Hours)
[Data3]
00H to 3BH (Minutes)
Acknowledgement
[a][][Set ID][][OK/NG][Data1][Data2][Data3][x]
*When reading data, FFH is inputted for [Data1], [Data2] and [Data3].
In other cases, all are treated as NG.
A21