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Communications Timing Section 4-4
If the Communications Port Enabled Flag turns OFF when operation is started
or SEND(090), RECV(098), or CMND(490) are executed, the contents of
these words will be cleared.
Flag Transitions
4-4-4 Timing of Commands Addressed to a Host Computer
Commands addressed to a host computer are sent at the timing shown in the
following diagrams.
Host Computer Sending Data
Word Content
A203 Communications Port Completion Code, Port No. 0
A204 Communications Port Completion Code, Port No. 1
A205 Communications Port Completion Code, Port No. 2
A206 Communications Port Completion Code, Port No. 3
A207 Communications Port Completion Code, Port No. 4
A208 Communications Port Completion Code, Port No. 5
A209 Communications Port Completion Code, Port No. 6
A210 Communications Port Completion Code, Port No. 7
A211 to A218 Reserved
Communications Port
Enabled Flag
Network communications
instructions
(PMCR(260)/SEND(090)/
RECV(098)/CMND(490))
Communications Port
Error Flag
Communications Port
Completion Code
Instruction 1
being
executed
Instruction 2
being
executed
Instruction 3
being
executed
End of previous
rocessin
(Normal end)
(No unit correspond-
ing to unit address)
(Normal end)
Response Required
Host computer Command
Command
Response
Response
Serial Communications
Board/Unit
Communications Port Enabled Flag
Command acknowledged
Command completed
No Response Required
Host computer
Serial Communications
Board/Unit
Command
Command Response
Communications Port Enabled Flag
Command acknowled
ed Command completed
(1)
(2)
(1)
(2)
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