NEC RS-232C user manual

Check code

BCC: Block Check Code

Refer to the section 4.5 “Check code” for a BCC calculation.

Delimiter

CR (0Dh): End of packet

***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.

	Header	Message	Check code	Delimiter
SOH-'0'-Monitor ID-'0'-'A'-'0'-'8'		STX-'C'-'2'-'1'-'3'-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'-'1'-'3' (43h, 32h, 31h, 33h): 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'-'1'-'6'		STX-'C'-'3'-'1'-'3'-PG-ON HOUR-ON MIN-	BCC	CR
		OFF HOUR-OFF MIN-INPUT-WD-FL-ETX
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".
'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.

'0'-'0'(30h, 30h): Program No.1

'0'-'6'(30h, 36h): Program No.7

ON_HOUR: Turn on time (hour)

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