Request Error; Network Error - Sony VPL-PX40 Protocol Manual

3-3-3-3. Request Error

This error occurs when Header or Command is illegal. The conditions of occurrence of the respective
errors are shown below.
Invalid Version
The version of the Header is other than 2.
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When another version is supported, an error occurs in all versions other than the supported version.
Invalid Category
The category does not match.
Example: 0x0B is specified in the device of Category = 0x0A.
Invalid Request
An unsupported request is specified.
Example: Request = 0x02 is specified.
Short Header
The received Data is 1 byte.
Short Community
The received Data is in the range of 2 to 5 bytes.
Short Command
The received Data is in the range of 6 to 9 bytes.

3-3-3-4. Network Error

This is an error that occurs in TCP/IP. The conditions of occurrence of the respective errors are shown
below.
Timeout
Communication was interrupted.
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VPL-PX35/PX40/FX51