NEC MultiSync C431 - Weekend Read; 12 Weekend Read and Write

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12. Weekend read and write
12.1 Weekend Read
This command is used in order to read the setting of Weekend.
1) The controller requests the monitor to reply with the Date & Time.
Header Message Check code
Delimiter
SOH-'0'-Monitor ID-
'0'-'A'-'0'-'8'
STX-'C'-'A'-'1'-'A'-'0'-'0'-ETX BCC CR
Header
SOH (01h): Start of Header
'0' (30h): Reserved
Monitor ID: Specify the Monitor ID of which you want to get status.
Ex.) If Monitor ID is '1', specify 'A'.
'0' (30h): Message sender is the controller.
'A' (41h): Message type is "Command".
'0'-'8'(30h, 38h): Message length
Message
STX (02h): Start of Message
'C'-'A'-'1'-'A' (43h, 41h, 31h, 41h):
 Weekend  command
'0'-'0' (30h, 30h): read request
ETX (03h): End of Message
Check code
BCC: Block Check Code
Refer to the section 4.3 “ Check code” for a BCC calculation.
Delimiter
CR (0Dh): End of packet
2) The monitor replies Date & Time to the controller.
Header Message Check code
Delimiter
SOH-'0'-'0'-Monitor ID-
'B'-'0'-'C'
STX-'C'-'B'-'1'-'A'-'0'-'0'-ST-
WEEK-ETX
BCC CR
Header
SOH (01h): Start of Header
'0' (30h): Reserved
'0' (30h): Message receiver is the controller
Monitor ID: Indicate a replying Monitor ID
Ex.) When this byte is set to 'A', the replying Monitor ID is '1'.
'B' (42h): Message type is "Command reply"
'0'-'C'(30h, 43h): Message length
Message
STX (02h): Start of Message
'C'-'B'-'1'-'A' (43h, 42h, 31h, 41h):
 Weekend reply  command
'0'-'0' (30h, 30h): read request
ST: Status
'0'-'0'(30h, 30h): No error
'0'-'1'(30h, 31h): Error
WEEK: Weekend
'0'-'0'(30h, 30h): None
bit assignment of a day of the week.
bit0: Monday
bit1: Tuesday
bit2: Wednesday
bit3: Thursday
bit4: Friday
bit5: Saturday
bit6: Sunday