NEC LCD Monitor, Manual

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10. Schedule read and write
10.1 Schedule Read
This command is used in order to read the setting of the Schedule.
1) The controller requests the monitor to read Schedule.
Header Message Check code Delimiter
SOH-'0'-Monitor ID-
'0'-'A'-'0'-'8'
STX-'C'-'2'-'2'-'1'-PG-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'-'2'-'2'-'1' (43h, 32h, 32h, 31h): Schedule read request command.
PG: Program No.

The data must be ASCII characters strings.
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 Message Check
code
Delimiter
SOH-'0'-'0'-Monitor ID-
'B'-'2'-'6'
STX-'C'-'3'-'2'-'1'-PG-ON HOUR-ON MIN-
OFF HOUR-OFF MIN-INPUT-WD-FL-P MODE-
EXT1-EXT2-EXT3-EXT4-EXT5-EXT6-EXT7-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".
'2'-'6'(32h, 36h): Message length
Message
STX (02h): Start of Message
'C'-'3'-'2'-'1' (43h, 33h, 32h, 31h): Schedule read reply command
PG-ON HOURS-ON MIN-OFF HOURS-OFF MIN-INPUT-WD-FL-P MODE-
EXT1-EXT2-EXT3-EXT4-EXT5-EXT6-EXT7: Schedule data
PG: Program No.
'0'-'0'(30h, 30h): Program No.1
|
'0'-'6'(30h, 36h): Program No.7
ON_HOUR: Turn on time (hour)
'0'-'0'(30h, 30h): 00
|
'1'-'7'(31h, 37h): 23 (=17h)
'1'-'8'(31h, 38h): ON timer isn't set.