4. RKC STANDARD COMMUNICATION
IM9000F02-E2
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(6) Acknowledgment [ACK]
Send [ACK] when the host computer could receive data items correctly.
Next, the REX-F9000 sends the identifier data following the identifier just sent in succession
shown in "
Communication identifier list
" (P. 31).
If data send from the REX-F9000 is suspend, send [EOT] to terminate the data link.
(7) Negative acknowledge [NAK]
If the host computer cannot receive send data correctly from the REX-F9000, it sends [NAK] to
the controller. Then, the REX-F9000 re-sends the same data to the host computer.
As the number of re-send times is not specified, take the necessary measures on the host
computer side if no recovery is made.
(8) No response from host computer
When the host computer is set to no response after the REX-F9000 sends data, the REX-F9000
sends [EOT] as time-out processing to terminate the data link (time-out time : approx. 3 sec).
(9) Indefinite response from host computer
When the response from the host computer is indefinite, the REX-F9000 sends [EOT] to
terminate the data link.
(10) Data link termination [EOT]
If it is necessary to suspend communication with the REX-F9000 or to terminate the data link
due to no response from the controller, the host computer sends [EOT].
