Mitsubishi Electric QJ71E71-100 User Manual page 382

(b) When the instruction ends abnormally at TCP (timeout error)
ECPRTCL instruction
Completion device
Completion device + 1
E71
Connected device
For an error occurred when the communication ends abnormally, refer to the error code stored in the buffer memory.
( Page 313, Section 16.6.3)
380
Waiting time
t: TCP ULP timer
to send
Send packet
The packet cannot be sent or
no response is received from
the connected device.
An error has
occurred.
The device
turns on upon
abnormal end.