Table 2-1 Main/Sub Selector Switch Settings - Hitachi LQE550 User Manual

① LINK LED
Lights when data is transmitted over the line from the LQE550, regardless of the kind of the
data.
② MAIN/SUB selector switch
In mounting two units of the LQE550 on a single unit, use this switch to specify to which they
are connected, the main link or the sublink.
Table 2-1 lists the possible switch settings.
Do not set the MAIN/SUB selector switch to 2 to F. Switch setting to 2 to 4 may
render the module inoperable or destroy transfer data (G000 to GFFF).
③ CPU number selector switch
Set a number between 0 to F to identify each CPU or LPU that is connected to the CPU link
line.
The CPU number that is set here differs from the PCs number that is set with a special tool.
④ Terminal block
Used to connect ⑤ to ⑧ below. Houses removable connectors.
⑤ LINK1 line connection terminal
Connect the cable from the CPU or LPU in the preceding stage to this terminal.
LINK1 is internally wired to LINK2.
⑥ LINK2 line connection terminal
Connect the cable from the CPU or LPU in the next stage to this terminal.
LINK1 is internally wired to LINK1.

Table 2-1 MAIN/SUB Selector Switch Settings

Setting
0
1
2 to F
2 NAMES AND FUNCTIONS OF EACH PART
Explanation
Main link
Sublink
Unused
NOTICE
2-3