Return

Meaning

EW_SOCKET (=-16)

Socket API related error.

err_no

Meaning

err_dtno

1

Error of socket API function

Return value of Windows API WSAGetLastError function.

2

Error of connect API function

3

Error of send API function

4

Error of recv API function

5

Error of select API function

6

Error of setsockopt API function

7

Error of gethostbyname API function

8

Timeout error of send API function

Where the error is occurred.

1

At sending request

2

At sending data of download

9

Timeout error of recv API function

Where the error is occurred.

1

At receiving request header

2

At receiving request data

3

At canceling upload data

4

At receiving data of upload

5

At starting or finishing the communication

10

Error of Winsock API is occurred in other process

Always 0.

11

EOF (end of file) detected

Where the error is occurred.

1

At send API function

2

At recv API function

Return

Meaning

EW_PROTOCOL (=-17)

Violation of the protocol.

err_no

Meaning

err_dtno

1

The send data is larger than the maximum transfer unit.

Always 0.

2

The sending data size is illegal.

3

The number of the recieved packet is 0.

4

The mark of the protocol is incorrect in the received packet header.

5

The packet type flag is incorrect in the received packet header.

6

The flag of the direction is incorrect in the received packet header.

7

Illegal received data size.

The detail information is shown.

1

The received data size is larger than the maximum transfer unit.

2

The received data size is incorrect at start of communication.

3

The data size of the received packet is less than 2 bytes.

4

The sum of data blocks of the received packet is larger than all packet size.

5

The sum of data blocks of the received packet is smaller than all packet size.

8

Communication error in the Ethernet Board

Error code of the Ethernet Board
When the error occuers, its detail message is displayed in the log screen of the Ethernet Board on CNC side. And refer it.
The main error is as follows.

2

The personal computer would establish over limited connection. See "Communication with Ethernet Board" in the GE Fanuc documentation for details.

Error handling.