Mitsubishi Electric Melsec Q Series User Manual page 103

3
SPECIFICATIONS
(2) When multiple DP-Masters are used
The bus cycle time (Bc) can be obtained by the following calculation formula when
there are multiple DP-Masters on the same network:
TBc[ms]
The following shows an example where two DP-Masters exist on the same network.
DP-Master 1 executes polling
DP-Master 1 bus cycle
time Bc(1)
Figure 3.40 Bus Cycle Time When Two DP-Masters Exist on the Same Network
n
Bc
(i)
i 1
n Number of DP-Masters
Bc Bus cycle time of each DP-Master
DP-Master 2 executes polling
DP-Master 2 bus cycle
time Bc(2)
TBc
3.5 Processing Time
3.5.1 Bus cycle time
( (1) in this section)
DP-Master 1 executes polling
1
2
3
Time
4
5
6
7
8
3
- 62