Mitsubishi Electric MELSEC iQ-F Series User Manual page 125

Error code Error name
CB30H MQTT communication
error
CB32H MQTT communication
error
CB40H MQTT communication
error
CB41H MQTT communication
error
CB50H MQTT communication
error
CB51H MQTT communication
error
CB52H MQTT communication
error
CB53H MQTT communication
error
CB54H MQTT communication
error
CB55H MQTT communication
error
CB56H MQTT communication
error
CB57H MQTT communication
error
CB60H MQTT communication
error
CB64H MQTT communication
error
CB66H MQTT communication
error
CB69H MQTT communication
error
CB6AH MQTT communication
error
CB70H MQTT communication
error
CB7FH MQTT communication
error
CF70H Communication path
error
CF71H Timeout error
Error details and causes
An unsubscribe execution error (UNSUBACK
is not received) has occurred.
A network error during execution of
UNSUBSCRIBE command has occurred.
A publish execution error (the PUBLISH
sequence cannot be completed) has occurred.
A network error during execution of PUBLISH
command has occurred.
No server is connected.
The topic is not specified.
There is no NULL code (00H) at the end of the
string.
A UTF-8 conversion data error has occurred.
Incorrect data size specification has occurred.
A GP.SOCRCV error has occurred.
MQTT connection is performed while the
certificate is being written.
A network error is detected during receiving
processing.
The connection number has been set
incorrectly.
A GP.SOCSND error has occurred.
A GP.SOCSND error has occurred.
An error has occurred in converting the
Unicode string.
Receive data was discarded since the
maximum receive size exceeded in converting
the Unicode string.
The received message was discarded for
being too large.
There is no ping response from the server.
An error occurred in the Ethernet
communication path.
A timeout error occurred.
Action
This error also occurs when an invalid string is specified in the
topic filter. Check if there is a problem with the topic filter. If there
is no problem with the topic filter, check if there is a problem with
the server.
This error may occur also when an invalid string is specified in the
topic filter. Check if there is a problem with the topic filter. If there
is no problem, check the network environment, such as the
connection cable, then try again.
Check if there is a problem with the server.
This error also occurs if an invalid string is specified in the topic or
the server does not support the specified QoS. Check that there is
no error with the specification of the topic/QoS.
If there is no problem with the specification, check the network
environment, such as the connection cable.
Retry the operation from Connect with FB: MQTT_Connect.
Specify the topic name.
Set the NULL code (00H) at the end of the string without the size
specification.
Check the specified Unicode string.
The size specification of the topic or message has exceeded the
maximum value.
Check if function blocks are executed at the same time.
Perform MQTT connection after writing the certificate.
Check the network environment, such as the connection cable,
and execute again.
Check that there is no error in the set connection number.
(The connection number specified in the MQTT connection device
with the external device configuration is specified by another
function.)
Check if function blocks are executed at the same time.
Check if function blocks are executed at the same time.
An error occurs when converting receive data from UTF-8 to
Unicode. Check for errors in the source data.
The number of characters exceeded 16383 in converting the
receive data from UTF-8 to Unicode. Check for errors in the
source data.
The size of the receive data does not fit the specification even
after Unicode conversion.
(Greater than topic: 765 bytes, message: 49149 bytes (utf-8 3
bytes is equivalent to one Unicode character))
Check for errors in the source data.
If communications other than ping also fail, check the server and
start over from FB: MQTT_Connect.
• Check the operation of the target device.
• Check if the connection cable is disconnected.
• Check the cautions for the executed function.
• Check the operation of the target device.
• Since there may be congestion of packets on the line, send
data after a certain period of time.
10 TROUBLESHOOTING
10.6 List of Error Codes
10
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