6-3. Request errors
These errors occur when a header or command is invalid. The conditions under which each error occurs are described below.
Invalid Version
When the version of a header is other than 2
Invalid Category
When a category differs
Invalid Request
When a request that is not supported is specified
Short Header
When the received data is 1 byte
Short Community
When the received data is 2 to 5 bytes
Short Command
When the received data is 6 to 9 bytes
6-4. Network error
This error occurs in TCP/IP. The conditions under which an error occurs are described below.
Timeout
When communication was interrupted halfway
6-5. Comm error
This is an error that occurs during communication with the main control microcomputer of display equip- ment.
Timeout
When the received data is not sent after data transmission
Check Sum Error
When a check sum error occurs in the main control microcomputer
Framing Error
When a framing error occurs
Parity Error
When a parity error occurs
Over Run Error
When an overrun error occurs
Other Comm Error
When other errors occur
Unknown Response
When data that cannot be processed is received
6-6. NVRAM error
Read Error
When the read operation from NVRAM fails
Write Error
When the write operation to NVRAM fails
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