c
-.
r
1-
F-’
r
i.
L
8.
COMMUNICATION,S USING QEDICAtEe,,RRQTOCOLS
ELSE^
8.2.2
PC
CPU
operakn
during
data
communlcatlonr
(1)
PC
CPU scan time
In response to the access request from the AJ71C24, the
PC
CPU
processes only a single request
in
each
END
processing while the PC
CPU
is
running.
Therefore, the scan time is extended by the time used for processing.
For intervening and processing times required for communications
between the AJ71 C24 and
PC
CPU, see Appendix
5.
The scan time is extended approximately
0.2
msec
if
an AJ71C24 is
installed (0.1 msec for an A3H,
A2A
(Sl), or A3ACPU), even
if
the
PC
CPU is not linked.
P
(2)
Simultaneous access
c-
P
Because the
PC
CPU executes only a single processing in
END
processing,
if
the
PC
CPU is accessed by more than one AJ71C24,
access to the
PC
CPU is suspended until other processing is com-
pleted. Thus, the number of times scanning is done is increased.
8-3
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