Mitsubishi MELSEC LJ71C24, User Manual

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12 - 4 12 - 4
12 DEDICATED INSTRUCTIONS
Function
(1) Data stored in the device designated in (S2) and succeeding devices are sent
according to the control data of the device designated in (S1) and succeeding
devices, via the on-demand function of the MC protocol of the module designated in
Un.
(S2)+ 0
+ 1
+ 2
b15 b0 to
Channel 1
Channel 2
LCPU C24
Send
Send
Channel to be
used is set by
the control data.
(2) Simultaneous execution of dedicated instructions
The following table shows the handling for when executing another instruction
during execution of the ONDEMAND instruction or executing the ONDEMAND
instruction during execution of another instruction in the same channel.
Instruction
1
Availability of
simultaneous
execution
Handling of simultaneous execution
ONDEMAND
•
The next instruction will be ignored until the active instruction has
been completed.
(However, simultaneous execution is available when channels to
be used are not the same.)
CSET
•
Dedicated instructions simultaneous execution error (7FF0
H
)
occurs in the dedicated instruction attempted later.
(However, simultaneous execution is available when channels to
be used are not the same.)
PUTE
GETE
SPBUSY
⎯
UINI
•
Dedicated instructions simultaneous execution error (7FF0
H
)
occurs in the dedicated instruction attempted later.
: Available : Not available
1 Since the dedicated instructions shown below use a different
communication protocol from that for the ONDEMAND instruction, they are
not used in the same channel.
•
OUTPUT, PRR, INPUT, BIDOUT, BIDIN, BUFRCVS, CPRTCL
If the dedicated instructions shown above are used in the same channel
with the ONDEMAND instruction, the communication protocol setting error
(7FF2
H
) occurs. (Except for the BUFRCVS instruction)