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MELSEC-F
TROUBLESHOOTING11
11 - 33
(2) When communication is performed using fixed buffer (non-procedure)
Since no message data length is specified in non-procedure communication, the
data received is stored in the receive buffer area as is.
It is recommended to set up some method of checking that the data is received
correctly. This can be achieved for instance by including the data length and data
type code in the application data of the message, so that the number of bytes and
type of application data can be identified on the receiving side.
POINT
Designate the actual data size of the text field for "data length" specified in the
application data field of a message sent from the external device to the Ethernet
module.
The Ethernet module never sends text whose size is different from the specified
data length to the external device.