SATO CL4NX Operator's Manual page 339

[Weekday] (SOS users only)
Specifies the day of the week to perform the periodic notification.
Appears only if you have enabled the NTP function or installed the optional RTC kit, and if you have
selected [Weekly] in the [Type] menu.
The setting range is from Monday to Sunday.
[Day] (SOS users only)
Sets the date to perform the periodic notification.
Appears only if you have enabled the NTP function or installed the optional RTC kit, and if you have
selected [Monthly] in the [Type] menu.
The setting range is from 1 to 28.
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