LG RCAW Operation & Maintenance Manual page 21

CONTROLS
PLC and HMI Unit
PLC and HMI Unit
The HMI (Human Machine Interface) side of the PLC (Programmable Logic Controller) and HMI assembly is shown on
the door side as shown in the below picture. The HMI is composed of wide full dot LCD with 4 line display and back
light, 9 functional keys, and 15 indicating LEDs for rich user interface.
ESC SET ENTER
START STOP
Through the LCD interface, the operator can monitor the status of chiller operation and control in detail. And the control
configurations also can be performed through the LCD interface. For the monitoring and the configuration 7 menu items
are prepared in the LCD display from main menu to parameter setting as shown in the below picture. In the below pic-
ture, amendable menu contents for the configuration are depicted with shaded color.
Arrow keys Indicating LED
Fig. 9
Operation & Maintenance Manual 21
Controls
Full dot LCD
:4 line text display
with backlight