Operating the VS-121HCA
11
7.3.1 Setting the Address Switches
Set the first or master device to machine #1. Set all other devices to other
unique machine numbers, as defined in
Table 4
.
7.3.2 Setting the Line Termination
To ensure correct operation, the RS-485 line must be terminated at both
ends. The master unit may be located at any part of the line, but when it is at
the end of the line, the termination switch must be set ON.
To set line termination, as shown in
Figure 5
:
•
For the
VS-121HCA
units located at the ends of the RS-485 line
(whether master or slave), set DIP 8 ON
•
For all other
VS-121HCA
units in the middle of the line, set DIP 8 OFF
Figure 5: Master/Slave Configuration
