NEC X754HB, Руководство пользователя

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24.2 Get Proof of Play Current
This command is used in order to get Current log data of Proof of Play.
Note
：
Proof of Play information cannot be read from the display when it is in OFF state. The display
must be fully powered on to read Proof of Play information. Also the display does not continue
to create any new logs while it is in OFF state.
1) The controller requests the monitor to get Current log data of Proof of Play.
Header Message Check code Delimiter
SOH-'0'-Monitor ID-
'0'-'A'-'0'-'8'
STX-'C'-'A'-'1'-'5'-'0'-'1'-ETX BCC CR
Header
SOH (01h) : Start of Header
'0' (30h) : Reserved
Monitor ID : Specify the Monitor ID from 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 is 8 bytes.
Message
STX (02h): Start of Message
'C'-'A'-'1'-'5': Proof of Play command
'0'-'1' (30h,31h): Get Current log of Proof of Play command
ETX (03h): End of Message
Check code
BCC: Block Check Code
Refer to the section 4.3 “Check code” for a BCC calculation.
Delimiter
CR (0Dh): End of packet
2) The monitor replies the result of Current log data to the controller.
Header Message Check code Delimiter
SOH-'0'-Monitor ID-
'0'-'B'-'3'-'4'
STX-'C'-'B'-'1'-'5'-'0'-'1'-ST-CNH-
CNL-Data(0)-Data(1)-Data(2)---
Data(18)-ETX
BCC CR
Header
SOH (01h) : Start of Header
'0' (30h) : Reserved
Monitor ID : Specify the Monitor ID from 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".
'3'-'4' (33h, 34h) : Message length is 52 bytes.
Message
STX (02h): Start of Message
'C'-'B'-'1'-'5': Proof of Play reply command
'0'-'1' (30h,31h): Get Current log of Proof of Play command
ST: Status
No Error : 00h (30h, 30h)
Error: 01h (30h, 31h)
CNH: Current log data Number (High byte)