Mitsubishi Electric MELSEC-L Series - Page 342

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(b) When the instruction ends abnormally at TCP (timeout error)
For an error occurred when the communication ends abnormally, refer to the error code stored in the buffer memory.
( Page 273, Section 16.7.3)
E71
Connected device
ECPRTCL instruction
Completion device
Completion device + 1
An error has
occurred.
The device
turns on upon
abnormal end.
t: TCP ULP timer
The packet cannot be sent or
no response is received from
the connected device.
Send packet
Waiting time
to send