Crestron electronic CP-X8150 Command Format, TCP #9715, Send Data format, Reply Error code

7. Other Functions

7.4 Command Control via the Network (continued)

Command Format

Command formats differ among the different communication ports.

●TCP #23

You can use the RS-232C commands without any changes. The reply data format is the same as the RS-232C commands. (RS-232C Communication in the Operating Guide - Technical)

However, the following reply will be sent back in the event of authentication failure when authentication is enabled.

<Reply in the event of an authentication error>

Reply

Error code

0x1F

0x04

0x00

●TCP #9715

Send Data format

The following formatting is added to the header (0 x 02), Data length (0 x 0D), Checksum (1 byte) and Connection ID (1 byte) of the RS-232C commands.

Header	Data length		RS-232Ccommand	Check Sum	Connection
					ID
0x02	0x0D		13 bytes	1 byte	1 byte
Header		→	0x02, Fixed
Data length		→	RS-232C commands byte length (0x0D, Fixed)
RS-232C command		→	RS-232C commands that start with 0xBE 0xEF
			(13 bytes)
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)

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