ViewSonic PJ1173 PJ1173 User Guide, English - Page 105
Send Data format
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Management with Web browser software 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. However, the following reply will be sent back in the event of authentication failure when authentication is enabled. Reply 0x1F Error code 0x04 0x00 ● TCP #9715 Send Data format The following formatting is added to the header (0x02), Data length (0x0D), Checksum (1byte) and Connection ID (1 byte) of the RS-232C commands. Header 0x02 Data length 0x0D RS-232C command 13 bytes Check sum Connection ID 1 byte 1 byte Header → 0x02, Fixed Data length → RS-232C commands byte length (0x0D, Fixed) RS-232C commands → 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) ViewSonic 100 PJ1173