Mitsubishi Electric QJ71E71-100 User Manual page 386

(b) When the instruction ends abnormally (timeout error at sending)
ECPRTCL instruction
Completion device
Completion device + 1
E71
Connected device
(c) When the instruction ends abnormally (timeout error of waiting time to receive)
ECPRTCL instruction
Completion device
Completion device + 1
E71
Connected device
*1 When the receive packet (expected packet) is not matched to the data by the waiting time to receive or when the
existence of a connected device cannot be checked within the time specified by the destination alive check timer (the
time calculated based on the destination existence confirmation starting interval timer value, destination existence
confirmation interval timer value, and Destination existence confirmation resending time), the instruction ends
abnormally.
For the error occurred when the communication ends abnormally, refer to the error code stored in the buffer memory.
( Page 313, Section 16.6.3)
384
Waiting time
to send
Send packet
Waiting time
to send
Send packet
Send packet
An error has occurred.
t: TCP ULP timer
The packet cannot be
sent or no response is
received from the
connected device.
t: waiting time to receive or the time
specified by the destination alive check timer
Receive data
The receive data did not
match the receive packet
(expected packet).
The device turns on
upon abnormal end.
Discarded
Receive data
An error has
occurred.
The device
turns on upon
abnormal end.
*1
Receive data