Johnson Controls YEWS Series User Manual

(4) Definition of digital input in ModBus protocol
Bit
bit0
bit1
bit2
bit3
bit4
bit5
bit6
bit7
Bit8-15
Switch Input
FLOW SWITCH
DISCHAGE PRESSURE SWITCH
HIGH PRESSURE SWITCH
OIL LEVEL SWITCH
MOTOR PROTECTION
EXT.INTERLOCK
START FAILURE
REMOTE SWITCH
RESERVED
Status
0=open 1=close
0=open 1=close
0=open 1=close
0=open 1=close
0=open 1=close
0=open 1=close
0=open 1=close
0=open 1=close
0=open 1=close
(5) Definition of digital output in ModBus protocol
Bit
bit0
bit1
bit2
bit3
bit4
bit5
bit6
bit7
bit8
Bit14
bit15
Digital output
CHILLED LIQUID PUMP
COMPRESSOR WYE CONTACTOR
COMPRESSOR DELTA CONTACTOR
COMPRESSOR OIL HEATER
LIQUID LINE BYPASS SOLENOID1
ALARM
LIQUID INJECTING
LIQUID LINE BYPASS SOLENOID2
RUNNING STATUS
CR4 LOAD SOLENOID
CR3 UNLOAD SOLENOID
Status
0=open 1=close
0=open 1=close
0=open 1=close
0=open 1=close
0=open 1=close
0=open 1=close
0=open 1=close
0=open 1=close
0=open 1=close
0=open 1=close
0=open 1=close
YEWS-E Water Cooling Screw Chiller/Heat Pump
47

Johnson Controls YEWS Series Specifications

General

Brand	Johnson Controls
Model	YEWS Series
Category	Chiller
Language	English