NEC MultiSync V422 Control Manual page 51

***Following command also can be used for to keep backward compatibility, in order to
read the setting of the Schedule.
1) The controller requests the monitor to read Schedule.
SOH-'0'-Monitor ID-'0'-'A'-'0'-'8'
Header
SOH (01h): Start Of Header
'0' (30h): Reserved
Monitor ID: Specify the Monitor ID of which you want to get status.
'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'-'2'-'1'-'3' (43h, 32h, 31h, 33h): Schedule read request command.
PG: Program No.

ETX (03h): End of Message
Check code
BCC: Block Check Code
Refer to the section 4.5 "Check code" for a BCC calculation.
Delimiter
CR (0Dh): End of packet
2) The monitor replies Schedule to the controller.
Header
SOH-'0'-'0'-Monitor ID-'B'-'1'-'6'
Header
SOH (01h): Start of Header
'0' (30h): Reserved
'0' (30h): Message receiver is the controller.
Monitor ID: Indicate a replying Monitor ID.
'B' (42h): Message type is "Command reply".
'1'-'6'(31h, 36h): Message length
Message
STX (02h): Start of Message
'C'-'3'-'1'-'3' (43h, 33h, 31h, 33h): Schedule read reply command
PG-ON HOURS-ON MIN-OFF HOURS-OFF MIN-INPUT-WD-FL: Schedule data
PG: Program No.
ON_HOUR: Turn on time (hour)
ON_MIN: Turn on time (minute)
Header
Ex.) If Monitor ID is '1', specify 'A'.
The data must be ASCII characters strings.
STX-'C'-'3'-'1'-'3'-PG-ON HOUR-ON MIN-
OFF HOUR-OFF MIN-INPUT-WD-FL-ETX
Ex.) When this byte is set to 'A', the replying Monitor ID is '1'.
'0'-'0'(30h, 30h): Program No.1
|
'0'-'6'(30h, 36h): Program No.7
'0'-'0'(30h, 30h): 00
|
'1'-'7'(31h, 37h): 23 (=17h)
'1'-'8'(31h, 38h): ON timer isn't set.
'0'-'0'(30h, 30h): 0
|
'3'-'B'(33h, 42h): 59
'3'-'C'(33h, 43h): On timer isn't set.
Message
STX-'C'-'2'-'1'-'3'-PG-ETX
Message
(51/71)
Check code Delimiter
BCC CR
Check code
BCC CR
Delimiter