User`s manual

11-15
Data link DL9 (master station) function
11
[5] Hierarchy link
(1) Hierarchy link combining DL1 and DL9
Creation of hierarchy link installing DL9 slave station and DL1 master station in a PC is available as
shown below.
For details, see the data link DL1 description on page 10-13.
(2) Expansion of the communicating station in data link DL9
The data link DL9 can communicate only up to 16 sets consisting 1 set of master station and 15 sets
of slave stations. However, slave station PCs have a multi-option slot, so that hierarchy link
communication is available using 2 sets of data link DL9 module.
Master station
" "means master station. " "means slave station.
Slave
station
01 02 03 04 05 06 07 10 11 12 13 14 15 16 17
Slave
station
01 02 03 04 05 06 07 10 11 12 13 14 15 16 17
15 sets of slave station 15 sets of slave station 15 sets of slave station 15 sets of slave station 15 sets of slave station 15 sets of slave station 15 sets of slave station 15 sets of slave station 15 sets of slave station 15 sets of slave station 15 sets of slave station 15 sets of slave station 15 sets of slave station 15 sets of slave station
This PC becomes a master
station of group A as well as a
slave station of group C.
This PC becomes a master
station of group B as well as a
slave station of group C.
Slave Slave
Slave Slave Slave Slave Slave Slave
Master
Master Master
Group C
Group BGroup A
As above, control multiple data link systems using other link system are available. In a hierarchy link
having more than 2 classes communication between the top and the lowest slave station takes much
time, and is not practical.