Mitsubishi Melsec-L Series User Manual page 218

Error
code
An abnormal end response was received for
C021
H
communications using a fixed buffer.
• A response could not be received within the response
monitoring timer value.
C022
H
• The connection with the connected device was closed
while waiting for a response.
• The connection with the connected device has not
been opened.
C023
H
• The connection with the connected device has been
closed.
C030
A sending error has occurred.
H
C031
A sending error has occurred.
H
A TCP ULP timeout error has occurred in the TCP/IP
C032
communication. (The connected device does not send
H
an ACK response.)
There is no connected device with the IP address that
C033
H
has been set.
On the ARP table, there is no connected device with the
C034
H
IP address that has been set.
The existence of the connected device could not be
C035
H
checked within the response monitoring timer value.
Because a cable is not connected or disconnected, the
C036
H
send process cannot be executed.
• Not all the data could be received within the response
monitoring timer value.
• Sufficient data for the data length could not be
C040
received.
H
• The remaining part of the message divided at the
TCP/IP level could not be received within the
response monitoring timer value.
216
Error description
• Read the response end code from the connection end code or
error log area and perform the required action.
• Check the operation of the connected device.
• Correct the response monitoring timer value.
• Check the open status of the connection with the connected
device.
• Open the connection with the connected device.
• Because there may be congestion of packets on the line, send
data after a certain period of time.
• Check if the cable is disconnected.
• Perform the self-diagnostics test to check for an error in the
Ethernet module.
• Because there may be congestion of packets on the line, send
data after a certain period of time.
• Check if the cable is disconnected.
• Perform the self-diagnostics test to check for an error in the
Ethernet module.
• Check the operation of the connected device.
• Correct the TCP ULP timeout value and perform the initial process
again.
• Because there may be congestion of packets on the line, send
data after a certain period of time.
• Check if the cable is disconnected.
• Correct the IP address of the connected device and the Ethernet
address.
• Use the default value (FFFFFFFFFFFF
has the ARP function. If it does not have the function, set the MAC
address.
• Check the operation of the connected device.
• Because there may be congestion of packets on the line, send
data after a certain period of time.
• Check if the cable is disconnected.
• Decrease the number of communication destinations.
• Check the operation of the connected device.
• Correct the settings of the alive check.
• Check if the cable is disconnected.
• Check if the cable is disconnected.
• Perform the loopback test to check for an error in the line.
• Perform the self-diagnostics test to check for an error in the
Ethernet module.
• Correct the data length of the communication data.
• Because there may be congestion of packets on the line, correct
the settings of the initial process.
• Send the same data from the connected device again.
Action
) if the connected device
H