LG RCWW Operation & Maintenance Manual page 25

Controller system composition diagram
Master, slave, HMI, Relay board communicates with RS485, and in one master/slave board, there are analog
input(temp. 12 channel, current 10 channel), analog output(current 4 channel), digital input(20 channel), digital out-
put(16 channel).
Relay board controls Solenoid valve in 2 comp.
KEY-
PAD
HMI: Display & Communication
DC 0~5V
INPUT
DIGITAL
OUTPUT
Relay: Solenoid valve
KEY-PAD
HMI: screen display and communication
DC 0~5V
INPUT
DIGITAL
OUTPUT
Relay: Solenoid valve
LCD
UART
DISPLAY
(MAIN)
(7inch)
DATA
DOWN
RS485
MICOM
(ARM)
UART
(Master)
MICOM
LCD
DISPLAY UART
(7inch) (MAIN)
DATA
DOWN
RS485
MICOM
(ARM)
UART
(Master)
Figure 16. Controller block diagram
UART
(DISPLAY)
MICOM
UART
(BMS)
UART
(Slave)
Master: temp. pressure digital
input/output control
UART
(DISPLAY)
MICOM
UART
(BMS)
UART
(Slave)
SLAVE: temp. pressure digital
input/output control
UART
(DISPLAY)
MICOM
UART
(BMS)
UART
(Slave)
Master: temp. pressure digital
input/output control
UART
(DISPLAY)
MICOM
UART
(BMS)
UART
(Slave)
SLAVE: temp. pressure digital
input/output control
PT100
INPUT
4-20mA
INPUT
4-20mA
OUTPUT
DIGITAL
INPUT
DIGITAL
OUTPUT
RS485
PT100
INPUT
4-20mA
INPUT
4-20mA
OUTPUT
DIGITAL
INPUT
DIGITAL
OUTPUT
PT100
INPUT
4-20mA
INPUT
4-20mA
OUTPUT
DIGITAL
INPUT
DIGITAL
OUTPUT
RS485
PT100
INPUT
4-20mA
INPUT
4-20mA
OUTPUT
DIGITAL
INPUT
DIGITAL
OUTPUT
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