Control Command Syntax (From PC to Projector) [H][AC][SoP][CRC][ID][SoM][COMMAND] [H][AC][SoP][CRC][ID][SoM][COMMAND][Value]

Example: Power On Command (Send Low Byte Firstly)

Enter the following code:

0xbe, 0xef, 0x10, 0x05, 0x00, 0xc6, 0xff, 0x11, 0x11, 0x01, 0x00, 0x01

Header [H] ==> Fixed, “be (Low Byte), ef (High Byte)” Address Code [AC] ==> Fixed, “10”

Size of Payload [SoP] ==> Byte size from MsgID to Command Code, “05 (Low Byte), 00 (High Byte)” or Byte size from MsgID to Value, “06 (Low Byte), 00 (High Byte)”.

CRC16 [CRC] ==> CRC value, “c6 (Low Byte), ff (High Byte)” MsgID [ID] ==> Fixed, “11 11”

MsgSize [SoM] ==> Byte size of Command Code, “01 (Low Byte), 00 (High Byte)” or Byte size of Command Code and Value, “02 (Low Byte), 00 (High Byte)” Command Code [COMMAND] ==> “Power On” Command, “01”

Projector Response Message Table

Byte0 value:

0x00: Success

0x01: Invalid Command (on the control command list but no valid)

0x02: Error Command (includes CRC error and unknown commands)

Projector Response System Status

Byte0, Byte1, Byte2

Byte0: 0x00 (Success)

Byte1: 0xff (the Command Code of System Status)

Byte2: Return status

Ex: When the projector is in standby mode, the return status will be 0x01.

Projector Response Lamp Hour Byte0, Byte1, Byte2, Byte3 Byte0: 0x00 (Success)

Byte1: 0x2f (the Command Code of Lamp Hour)

Byte2: LSB (Hex)

Byte3: MSB (Hex)

Ex: 800 (3x256 + 2x16 = 800) hours --> 0x00, 0x2f, 0x20, 0x03

Firmware Version Response Byte0, Byte1, Byte2, Byte3…Byte7 Byte0: 0x00 (Success)

Byte1: 0x30 (the Command Code of Firmware Version) Byte2…Byte7

Firmware version: 6 Bytes ASCII Code: “M0RXXX”

XXX: 000-999

Ex: Version M0R001 Æ “M0R001” Æ0x4d, 0x30, 0x52, 0x30, 0x30, 0x31 (Success,

the Command Code of FW Version, 6 Bytes ASCII Code: “M0RXXX”)

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Dell RS232 manual Projector Response Message Table, Projector Response System Status

RS232 specifications

Dell RS232 interfaces represent a classic yet essential technology in the realm of computer connectivity. RS232, or Recommended Standard 232, is a standard for serial communication that has been in use since the 1960s, designed primarily for connecting computers to peripheral devices like modems, printers, and data acquisition systems. Dell, as a leading technology provider, has incorporated RS232 into many of its systems, catering to various industrial and commercial needs.

One of the main features of Dell RS232 interfaces is their simplicity and reliability. The protocol allows for point-to-point communication, making it easy to establish a direct link between two devices. With a maximum cable length of up to 50 feet (15 meters), RS232 connections are particularly beneficial in environments where devices are physically separated. This attribute is crucial for usage in industrial settings where machines often operate over larger distances.

In terms of technology, Dell's RS232 implementations typically operate at standard transmission speeds ranging from 300 to 115,200 bits per second. This versatility ensures compatibility with a broad spectrum of devices, enhancing operational flexibility. Furthermore, RS232 supports various data formats, including 7 or 8 data bits, one or two stop bits, and parity options, allowing users to tailor communication settings according to specific requirements.

The physical characteristics of RS232 ports include the familiar DB9 and DB25 connectors. These connectors feature pins that correspond to specific functions, such as transmission and reception of data, ground references, and control signals. Dell ensures robust design and construction of these ports, catering to the demands of both consumer and industrial applications.

In addition to being a reliable communication protocol, RS232 also provides a certain degree of error checking, enhancing data integrity. Control signals like RTS (Request to Send) and CTS (Clear to Send) assist in managing the data flow, ensuring that devices operate smoothly without data loss.

Although newer technologies like USB and Ethernet have gained prominence, RS232 remains a mainstay due to its legacy support and integration in industrial equipment. Dell RS232 interfaces continue to play a vital role in many legacy systems, ensuring that critical devices remain operable and easily connected. In conclusion, Dell RS232 technology embodies a blend of simplicity, reliability, and adaptability, making it a valuable component in the diverse landscape of hardware connectivity.