Command Control Settings; Command Format - Hitachi CP-CX251N Operating And Users Manual

Command Control via the Network (continued)

Command control settings

[TCP #23]

1. Command format

Same as RS-232C communication, refer to RS-232C Communicaton command format.
2. Response code / Error code ("h" shows hexadecimal)
Four of the response / error code used for TCP #23 are the same as RS-232C
Communication (1)~(4). One authentication error reply (5) is added.
(1) ACK reply: 06h
(2) NAK reply: 15h
(3) Error reply: 1Ch + 0000h
(4) Data reply: 1Dh + xxxxh
(5) Authentication error reply: 1Fh + 0400h
When authentication error occurred, the projector returns the error code.
*:(1)~(4)
Refer to RS-232C communication
[TCP #9715]
1. Command format
The commands some datum are added to the head and the end of the ones of
TCP #9715 are used.
Header
0×02
[Header]
0x02, Fixed.
[Data Length]
RS-232C commands byte length (0×0D, Fixed).
[RS-232C commands]
Refer to RS-232C Communication command format (&9).
[Check Sum]
This is the value to make zero on the addition of the lower 8 bits from the header
to the checksum.
[Connection ID]
Random value from 0 to 255 (This value is attached to the reply data).
NOTE • Operation cannot be guaranteed when the projector receives
an undefined command or data.
• Provide an interval of at least 40ms between the response code and any other
code.
• Commands are not accepted during warm-up.
Data length RS-232C command
0×0D
(&10).
Check sum
13 bytes
13
Connection ID
1 byte 1 byte