NEC RS-232C - Manual (Page 24)

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'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.
ON_MIN: Turn on time (minute)
'0'-'0'(30h, 30h): 0
|
'3'-'B'(33h, 42h): 59
'3'-'C'(33h, 43h): On timer isn't set.
OFF_HOUR: Turn off time (hour)
'0'-'0'(30h, 30h): 00
|
'1'-'7'(31h, 37h): 23 (=17h)
'1'-'8'(31h, 38h): Off timer isn't set.
OFF_MIN: Turn off time (minute)
'0'-'0'(30h, 30h): 0
|
'3'-'B'(33h, 42h): 59 (=3Bh)
'3'-'C'(33h, 43h): Off timer isn
’t set.
INPUT: Timer input
'0'-'0'(30h,30h): No mean (works on last memory)