Mitsubishi MELSEC-Q/L Programming Manual page 702

D.DDRD, DP.DDRD
Control Data
Device Item
Completion status
+0
S1
Number of read
+1
S2
points
Function
(1) In multiple CPU system, data stored in a device specified by another CPU (n) (
read points specified by ( +1) into a device specified by host CPU ( ) or later.
Start device number of the
storage location for read data
D2
Number of read points
S1 +1
(2) Whether to complete the D(P).DDRD instruction normally can be checked by the completion device (
completion status display 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.
• 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).
(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).
700
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.
S1
Host CPU
(CPU that requests reading)
+1).
D2
Number of blocks used for the instruction
Number of read points
specified by the instruction
1 to 100
Setting range
––
1 to 100
) or later is stored by the number of
D1
S2
Start device number of the storage
location where read has been stored
S1
Another CPU n
(CPU to be read)
D(P).DDRD instruction
1
Set by
System
User
+0) and
D2
S1