700
D.DDRD, DP.DDRD
Contro
l
Data
F
unct
i
on
(1) In multiple CPU system, data stored in a device specified by another CPU (n) ( ) or later is stored by the number of
read points specified by ( +1) into a device specified by host CPU ( ) or later.
(2) Whether to complete the D(P).DDRD instruction normally can be checked by the completion device ( +0) and
completion status display device ( +1).
(a) END processing in scan data that CPU completed the instruction turns on the device and the next END processing
turns off the device.
(b) This device turns on/off depending on the status upon completion of the instruction.
• Normal completion: Off
• Error completion: Turns on at END processing in the scan where the instruction has been completed, and turns
off at the next END processing (At error completion, an error code is stored at control data ( +0): Completion
status)).
(3) The number of blocks used for the instruction depends on the number of read points (refer to Page 686, Section 10.1).
Number of blocks used for the instruction
(4) The instruction will be completed abnormally when there are no empty blocks in the multiple CPU high speed
transmission area.
Set the number of blocks used for the instruction at special registers (SD796 to SD799), and use the special relays
(SM796 to SM799) as an interlock prevent error completion (refer to Page 687, Section 10.1).
Device
Item
Setting data
Setting range
Set by
+0
Completion status
An execution result
upon
completion of the
instruction is stored.
0000(
H
): No errors (normal completion)
Other than 0000(
H
): Error code (error completion)
––
System
+1
Number of read
points
Set the number of read points in units of words.
1 to 100
User
Number of read points
specified by the instruction
D(P).DDRD instruction
1 to 100
1
S1
S2
D1
S1
S2
Start
de
vi
ce
number
of
the
storage
l
ocat
i
on
for
read
data
D2
N
umber
of
read
po
i
nts
S1
+
1
H
ost
CP
U
(CP
U
that
requests
read
i
ng)
Another
CP
U
n
(CP
U
to
be
read)
Start
de
vi
ce
number
of
the
storage
l
ocat
i
on
w
here
read
has
been
stored
S1
D2
D2
S1