Mitsubishi Electric Melsec Q Series User Manual page 66

3
SPECIFICATIONS
(1) Input data area (for mode 3) (Un\G6144 to Un\G10239)
Address
DEC (HEX)
6144(1800
to
6156(180C
6157(180D
to
6160(1810
to
10239(27FF
Figure 3.9 Example of Input Data Assignment (1st module: 23 bytes, 2nd module: 7 bytes)
1st module
2nd module
3rd module
4th module
5th module
3
- 25 3.4 Buffer Memory
3.4.4 I/O data exchange area
When the operation mode is Communication mode (mode 3), input data from DP-
Slaves are stored in this area.
(a) Data length setting
The data length (unit: byte) for each station is variable and assigned based on the
slave parameter ("Slave Modules" window) set using GX Configurator-DP.
For the DP-Slave that has a fixed data length, the slave parameter setting will be
ignored.
(b) Data length range
The maximum data length per module is 244 bytes, and the total data length for all
DP-Slaves can be set up to 8192 bytes.
When the data length is an odd number of bytes, 00
The input data of the next station is assigned starting from the next buffer memory
address.
)
H
Input data of 1st module
(Input data length:
23 bytes)
)
H
)
H
Input data of 2nd module
(Input data length:
7 bytes)
)
H
Input data of n-th module
)
H
POINT
If a DP-Slave with no input data is assigned, its space in the input data area is
taken over by the next station with input data, as shown below.
Each DP-Slave setting
Input data : Set
Input data : None
Input data : Set
Input data : Set (Data length: 0)
Input data : Set
b15
6144(1800 ) 2nd byte of 1st module
H
6145(1801 )
4th byte of 1st module
H
6155(180B ) 22nd byte of 1st module 21st byte of 1st module
H
6156(180C )
00
H
H
6157(180D )
2nd byte of 2nd module 1st byte of 2nd module
H
6158(180E ) 4th byte of 2nd module
H
6159(180F ) 6th byte of 2nd module
H
6160(1810 )
00
H H
Assignment result in Input data area of QJ71PB92V
6144(1800 )
H
Input data of 1st module
Input data of 3rd module
Input data of 5th module
Because of no input data setting for 2nd
and 4th modules, no area is assigned for them
is stored to the final high byte.
H
b8 b7
1st byte of 1st module
3rd byte of 1st module
23rd byte of 1st module
3rd byte of 2nd module
5th byte of 2nd module
7th byte of 2nd module
b0