Mitsubishi Electric QJ71E71-100 User Manual page 157

(e) End codes
An error code is stored in the end code added to a response. For the error codes, refer to the error code list.
( Page 309, Section 16.6.1)
End codes are stored in the complete status area (in the control data) of the BUFSND and BUFRCV
instructions, as well as the communication status storage area of the buffer memory.
If an error code related to MC protocol communications or communications using a random access buffer is stored during
communications using a fixed buffer, it may be caused by the following.
Cause
The data length value specified in the application data of the
message sent from a connected device to the E71 is different
from the actual text data size.
The subheader of the message sent from a connected
device to the E71 is incorrect.
CHAPTER 12 COMMUNICATIONS USING A FIXED BUFFER
Action
Specify the actual text data size for the data length in the
application data.
(Refer to "Remark" in this page.)
Correct the subheader specified in the application data.
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