Mitsubishi MELSEC Q Series Programming Manual page 914

D(P).DDRD
Control Data
Device
Completion status
+0
S1
Number of read
+1
S1
points
(1) In multiple CPU system, data stored in a device specified by another CPU (n) (
stored by the number of read points specified by ( +1) into a device specified by host CPU
( ) or later.
S2
Start device number of the
storage location for read data
(2) Whether to complete the D(P).DDRD instruction normally can be checked by the completion
device (
(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.
(3) The number of blocks used for the instruction depends on the number of read points (refer to
Section 12.1).
(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
Section 12.1).
10-18
Item Setting data
An execution result upon completion of the
instruction is stored.
0000( ): No errors (normal completion)
H
Other than 0000( ): Error code (error completion)
H
Set the number of read points in units of words.
D2 Host CPU
(CPU that requests reading)
Number of read points
S1 +1
+0) and completion status display device (
D2
• 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)).
Number of blocks used for the instruction
Number of read points
specified by the instruction
1 to 100
Setting range
––
1 to 100
S1
Another CPU n
(CPU to be read)
+1).
D2
S1
D(P).DDRD instruction
1
Set by
System
User
) or later is
D1
Strat device number of the storage
location where read has been stored
S1