Mitsubishi Electric QJ71C24N User Manual page 286

10 DEDICATED INSTRUCTIONS
Function
10 - 4
(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.
QCPU
to
b15
(S2)+ 0
+ 1
+ 2
(2) Simultaneous execution of dedicated instructions
The following table lists 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.
Availability of
1
Instruction simultaneous
execution
ONDEMAND
CSET
PUTE
GETE
SPBUSY
UINI
1 Because the dedicated instructions listed 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 above are used in the same channel with the
ONDEMAND instruction, the communication protocol setting error (7FF2
occurs. (Except for the BUFRCVS instruction)
Q series C24
b0
Handling of simultaneous execution
 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.)
 Dedicated instructions simultaneous execution error (7FF0
occurs in the dedicated instruction attempted later.
(However, simultaneous execution is available when channels to
be used are not the same.)
 Dedicated instructions simultaneous execution error (7FF0
occurs in the dedicated instruction attempted later.
Send
Channel 1
Send
Channel 2

: Available
MELSEC-Q
Channel to be
used is set by
the control data.
)
H
)
H
: Not available
)
H
10 - 4