Johnson Controls YEWS Series User Manual

YEWS-E Water Cooling Screw Chiller/Heat Pump
Baud rate
Word length
Parity
Stop bits
Data mode
verify
9600
8
None
1
RTU
CRC
5.7 Modbus protocol
(1) Modbus protocol instructions
44
(2) ModBus node list
Address
201
202
203
204
205
206
207
208
209
210
101
102
121
103
122
104
105
106
107
108
109
115
116
117
112
111
Functions
3,6
3,6
3,6
3,6
3,6
3
3
3
3
3,6
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
Description
Start/stop
Mode select
AC: LEL setting
ITS: LEL setting
Heat pump: LHL setting
Alarm
Runtime limit
Oil Pre-heating
CONTROL MODEL
Heat pump: LHL setting
Digital output
Digital input
Zleaving condenser Liquid
Enter condenser Liquid
Leaving evaporator Liquid
Enter evaporator Liquid
Discharge Temperature
Evaporator pressure
Discharge pressure
Oil pressure
Motor current
DI fault
AI fault
RUN fault
Water pump operation time
Compressor operation time
Word length
word
word
word
word
word
word
word
word
word
word
word
word
word
word
word
word
word
word
word
word
word
word
word
word
word
word
note
Command 1:start, 2:stop
Status 0:stop,1:start
0:AC 1:ITS 2:HP 3:REMOTE
Range： 4.0 – 15.0℃
Range：-8.0 – +5.0℃
YEWS-D1 HP Range: 30.0 - 60.0℃
YEWS-E HP2 Range: 30.0 - 60.0℃
1: yes 0: no
1: yes 0: no
1: yes 0: no
0 LOCAL 1 REMOTE 2 MODBUS
YEWS-E HP Range: 30.0 - 50.0℃
See table 4/table 5
Signed binary，the value is multiplied per 10
Signed binary，the value is multiplied per 10
Signed binary，the value is multiplied per 10
Signed binary，the value is multiplied per 10
unsigned binary，the value is multiplied per 10
unsigned binary
unsigned binary
unsigned binary
unsigned binary，the value is multiplied per 10
See table 1/ table 2/ table 3
accumulative total
accumulative total
System1

Johnson Controls YEWS Series Specifications

General

Brand	Johnson Controls
Model	YEWS Series
Category	Chiller
Language	English