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'A' (41h): Monitor ID
If the command should be sent to certain monitor only, the either of character ‘A’(41h) to ‘Z’(5Ah)
which is corresponding to monitor ID from No1 to No.26 should be set to this portion. If it is
a broad cast command(only “set command” is available), then the ’*’(2Ah)should be applied.
'0' (30h): Message sender is the controller
'A' (41h): Message type is "Command"
'1'-'4'(31h, 34h): Message length.
Message
STX (02h): Start of Message
'C'-'2'-'1'-'2' (43h, 32h, 31h, 32h): Date & Time write command
'YY'-'MM'-'DD'-'WW'-'HH'-'MN'-'DS': Date & Time data
YY: Year (offset 2000)
'0'-'0'(30h, 30h): 2000
|
'6'-'3'(36h, 33h): 2099 (99 = 63h)
MM: Month
'0'-'1'(30h, 31h): January
|
'0'-'C'(30h, 43h): December
DD: Day
'0'-'1'(30h, 31h): 1
|
'1'-'E'(31h, 45h): 30(=1Eh)
WW: weekdays
This parameter if no use, since the week is automatically calculated by Monitor
based on the date data.
HH: Hours
'0'-'0'(30h, 30h): 0
|
'1'-'7'(31h, 37h): 23 (=17h)
MN: Minutes
'0'-'0'(30h, 30h): 0
|
'3'-'B' (33h, 42h): 59 (=3Bh)
DS: Daylight saving (Summer time)
'0'-'0'(30h, 30h): NO
'0'-'1'(30h, 30h): YES
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 a data for confirmation.(If command is sent as
“
Broadcast
”
then no reply
should be sent back.).
Header Message
Check
code Delimiter
SOH-'0'-'0'-'A'-'B'-'1'-'6' STX-'C'-'3'-'1'-'2'-ST-YY-MM-DD-WW-HH-MN-DS-ETX
BCC
CR
Header
SOH (01h): Start Of Header
'0' (30h): Reserved
'0' (30h): Message receiver is the controller
'A' (41h): Monitor ID
This portion should depend on the monitor ID of Monitor.( ’A’(41h)-‘Z’(5Ah)).
