SMC Networks Series HRS012-A User manual

HRX-OM-M091-H
1st edition: Jul. 2009
8th edition: Nov.2011
Operation Manual
Communication function
Thermo chiller
Air-Cooled
refrigerated type Water-Cooled refrigerated type
HRS012-A ∗ -10- ∗ HRS012-W ∗ -10- ∗
HRS018-A ∗ -10- ∗ HRS018-W ∗ -10- ∗
HRS012-A ∗ -20- ∗ HRS012-W ∗ -20- ∗
HRS018-A ∗ -20- ∗ HRS018-W ∗ -20- ∗
HRS024-A ∗ -20- ∗ HRS024-W ∗ -20- ∗
HRS050-A ∗ -20- ∗ HRS050-W ∗ -20- ∗
Keep this manual available whenever necessary
© 2011 SMC CORPORATION All Rights Reserved

To the users
Thank you for purchasing SMC’s Thermo chiller (hereinafter referred to as the “product”).
For safety and long life of the product, be sure to read this operation manual (hereinafter referred to as the
“manual”) and clearly understand the contents.
●Be sure to read and follow all instructions noted with “Warning” or “Caution” in this manual.
●This manual is intended to explain the installation and operation of the product. Only people who
understand the basic operation of the product through this manual or who performs installation and
operation of or have basic knowledge about industrial machines are allowed to work on the product.
●This manual and other documents attached to the product do not constitute a contract, and will not affect
any existing agreements or commitments.
●It is strictly prohibited to copy this manual entirely or partially for the use by the third party without prior
permission from SMC.
Note: This manual is sub
j
ect to
p
ossible chan
g
e without
p
rior notice.

HRX-OM-M091
Contents
HRS Series
Contents
Chapter 1 Read before using.............................................................1-1
1.1 Communication mode and operation method ........................................................1-2
1.2 Communication port..................................................................................................1-3
1.3 Key operations...........................................................................................................1-4
1.4 Parameters .................................................................................................................1-6
Chapter 2 Contact input/output communication .............................2-1
2.1 Precautions for communication...............................................................................2-1
2.1.1 Precautions wiring communication...................................................................................... 2-1
2.1.2 Precautions after wiring and before communication ........................................................... 2-1
2.2 Communication specification...................................................................................2-2
2.3 Terminal block explanation.......................................................................................2-2
2.4 Setting and checking.................................................................................................2-4
2.4.1 Setting and checking........................................................................................................... 2-4
2.4.2 Setting and checking........................................................................................................... 2-5
2.5 Contact input signal.................................................................................................2-16
2.5.1 Run/stop signal･Remote signal......................................................................................... 2-16
2.5.2 Signal of the external switch ............................................................................................. 2-18
2.6 Contact output signal..............................................................................................2-19
Chapter 3 Serial communication.......................................................3-1
3.1 Precautions wiring communication .........................................................................3-1
3.2 Communication specification...................................................................................3-1
3.3 Connected explanation .............................................................................................3-2
Chapter 4 MODBUS communication function..................................4-1
4.1 Precautions for communication...............................................................................4-1
4.1.1 Precautions after wiring and before communication ........................................................... 4-1
4.1.2 Precautions for communicating........................................................................................... 4-2
4.2 Communication specification...................................................................................4-2
4.3 Setting and checking.................................................................................................4-3
4.3.1 Setting and checking items ................................................................................................. 4-3
4.3.2 Setting and checking........................................................................................................... 4-4
4.4 Communication sequence ........................................................................................4-7
4.5 Message configuration..............................................................................................4-8
4.5.1 Message format................................................................................................................... 4-8
4.5.2 Message example ............................................................................................................... 4-9
4.6 Function codes ........................................................................................................4-10
4.7 LRC............................................................................................................................4-10
4.8 Explanation of function codes................................................................................4-11
4.8.1 Function code：03 Reading multiple registers ..................................................................4-11
4.8.2 Function code：06 Writing registers ................................................................................. 4-12

HRX-OM-M091
Contents
HRS Series
4.8.3 Function code：16 Writing multiple registers .................................................................... 4-13
4.8.4 Function code：23 Reading/writing multiple registers ...................................................... 4-14
4.9 Negative response...................................................................................................4-16
4.10 Register Map ............................................................................................................4-17
4.10.1 Circulating fluid discharge temperature ............................................................................. 4-17
4.10.2 Circulating fluid discharge pressure .................................................................................. 4-17
4.10.3 Electric resistivity of the circulating fluid ............................................................................4-17
4.10.4 Status flag ..........................................................................................................................4-18
4.10.5 Alarm flag...........................................................................................................................4-19
4.10.6 Circulating fluid set temperature........................................................................................ 4-21
4.10.7 Operation Start Command.................................................................................................4-21
Chapter 5 Simple communication protocol function ......................5-1
5.1 Precautions for communication...............................................................................5-1
5.1.1 Precautions after wiring and before communication ........................................................... 5-1
5.1.2 Precautions for communicating ........................................................................................... 5-2
5.1.3 Precautions after the completion of the communication...................................................... 5-2
5.2 Communication specification...................................................................................5-3
5.3 Setting and checking.................................................................................................5-4
5.3.1 Setting and checking items.................................................................................................. 5-4
5.3.2 Setting and checking ...........................................................................................................5-5
5.4 Communication sequence......................................................................................5-11
5.5 Message configuration............................................................................................5-12
5.5.1 Message format .................................................................................................................5-12
5.5.2 Message example.............................................................................................................. 5-14
5.6 BCC...........................................................................................................................5-15
5.7 Command .................................................................................................................5-15
5.8 Command explanation ............................................................................................5-16
5.8.1 Command:PV1 Circulating fluid discharge temperature ...................................................5-16
5.8.2 Command:SV1 Circulating fluid set temperature (R) ........................................................ 5-17
5.8.3 Command:SV1 Circulating fluid set temperature (W) ....................................................... 5-18
5.8.4 Command:LOC Key-lock setting (R) ................................................................................. 5-19
5.8.5 Command:LOC Key-lock setting (W) ................................................................................ 5-20
5.8.6 Command:STR Saves data (W) ........................................................................................ 5-21
5.9 Negative response...................................................................................................5-22
Chapter 6 Communication alarm function .......................................6-1
6.1 Communication alarm occurs ..................................................................................6-1
6.2 Communication alarm reset......................................................................................6-2
6.3 Setting and checking.................................................................................................6-2
6.3.1 Setting and checking items.................................................................................................. 6-2
6.3.2 Setting and checking ...........................................................................................................6-3

HRX-OM-M091
Chapter 1 Read before using
HRS Series 1.1 Communication mode and operation method
1-1
Chapter 1 Read before using
The communication of this device consists of contact input/output communication
and serial communication.
MODBUS communication and simple communication protocol can be selected
as the serial communication protocol. Depending on the customer’s specification,
communication can be changed to contact input/output communication or serial
communication.
Table 1-1 Communication method
Contact input/output communication
This product is equipped with a terminal which runs/stops the
product by remote control and a terminal which can pick up alarm
signals. The terminals can be changed depending on the
customer’s application.
MODBUS standard
protocol
Serial communication (RS-485/RS232C) enables remote control of
run/start of the product, temperature setting, and details of product
condition and alarm condition can be obtained.
Serial
communication Simple
communication
protocol
Serial communication (RS-485/RS232C) enables remote control of
temperature setting.
This protocol complies with SMC thermo-cooler HRG, HRGC
series.
(We recommend using the MODBUS protocol if you are unfamiliar
with using the communication function.)
There are two ways to start and stop by simple communication
protocol. The customer can choose between operation using the
Operation display panel (simple communication protocol 1) and
remote control using the contact input (simple communication
protocol 2).
●If using contact input/output communication, refer to chapter 2.
●If using serial communication MODBUS, refer to chapter 3 for
serial communication specifications first, then refer to chapter 4
for protocol specifications.
●If using simple communication protocol for serial
communication, refer to chapter 3 for serial communication
specifications first, then refer to chapter 5 for protocol
specifications.

HRX-OM-M091
Chapter 1 Read before using
1.1 Communication mode and operation method HRS Series
1-2
1.1 Communication mode and operation method
LOCAL, DIO and SERIAL are available as the communication modes. Table
1.1-1 explains the communication modes. The default setting is LOCAL.
The operation method depends on the communication mode. Table 1.1-2 shows
how the communication mode and method of operation are related.
The operation of the product functions depends on the communication mode.
Table 1.1-3 shows how the communication mode and functions of this product
are related.
Table 1.1-1 Communication modes
Communication mode Explanation
LOCAL Mode allowing the product to be operated by the operation panel.
Mode allowing the product to be operated by the contact input/output communication.
When the communication mode is “DIO”, operation mode automatically becomes “DIO
REMOTE”.
"DIO REMOTE” and “DIO LOCAL” can be selected by DIO communication signal.
DIO REMOTE：
Contact input/output communication takes control of the operation
of the product.
The [REMOTE] lamp on the operation panel turns on.
DIO
DIO LOCAL：Operation control of the product is the same as that of LOCAL.
The [REMOTE] lamp on the operation panel turns off.
SERIAL Mode allowing the product to be operated by serial communication. MODBUS/ simple
communication protocol can be selected.
Table 1.1-2 Communication mode and operation
DIO SERIAL
Simple
communication
protocol pattern
LOCAL DIO
LOCAL DIO REMOTE MODBUS
1 2
Run/Stop control with operation display
panel ○ ○ × × ○ ×
Circulating fluid discharge temperature
setting control with operation display panel ○ ○ ○ × ×
Except above with operation display panel ○ ○ ○ ○ ○
Condition reading with operation display
panel ○ ○ ○ ○ ○
Run/Stop operation by contact input/output
communication × × ○ × × ○
Condition reading by contact input/output
communication ○ ○ ○ ○ ○
Reading of the external switch ○ ○
∗1 ○ ∗1 ○
○ ○∗1
Run/Stop operation by serial
communication. × × × ○ ×
Circulating fluid discharge temperature
setting control by serial communication. × × × ○ ○
Condition reading by serial communication. ○ ○ ○ ○ ○
∗1: Only one external switch can be installed.
Table 1.1-3 Communication mode and product functions
DIO SERIAL
Simple
communication
protocol pattern
LOCAL DIO
LOCAL DIO REMOTE MODBUS
1 2
Run timer ○ ○ × × ○ ×
Stop timer ○ ○ × × ○ ×
Recovery from power failure ○ ○ × × ○ ×
Anti-freezing ○ ○ ○ ○ ○ ○
Pump accumulated operating time reset ○ ○ × × ○ ×

HRX-OM-M091
Chapter 1 Read before using
HRS Series 1.2 Communication port
1-3
1.2 Communication port
The communication port at the back of the product is used for communication.
Fig 1.2-1, Fig 1.2-2 shows the location of the communication port.
Fig 1.2-1 Communication port (HRS012-∗∗-∗-∗, HRS018-∗∗-∗-∗, HRS024-∗∗-20-∗)
Fig 1.2-2 Communication port (HRS050-∗∗-20-∗)
Contact
input/output(DIO)
Connector for
communication
Used for DIO
communication.
Mating connector
is prepared as an
accessory.
Connector for
option
Not used for
communication.
Serial
communication
Connector
Used for
RS-485/RS-232C.

HRX-OM-M091
Chapter 1 Read before using
1.3 Key operations HRSSeries
1-4
1.3 Key operations
Fig 1.3-1 ‘’Key operation (1/2)’’ and
Fig 1.3-2 ‘’Key operation (2/2)’’ show the operation of keys of the thermo-chiller.
This manual explains the “Communication setting menu”.
MENU
PV
SV
Circulating
fluid outlet
temperature
Circulating
fluid set
temperature
Circulating
fluid outlet
pressure
Main display
Circulating
fluid outlet
temperature
Circulating
fluid return
port
Check monitor
menu
Temperature
of the
compressor
inlet.
PV
SV
PV
SV
PV
SV
PV
SV
Circulating
fluid outlet
pressure
PV
SV
Pressure of
higher
pressure
refrigerant
circuit
PV
SV
Pressure of
lower
pressure
refrigerant
circuit
Accumulated
operation
time of the
pump
Accumulated
operation
time of the
fun motor
Accumulated
operation
time of the
compressor
Accumulated
operation
time
PV
SV
PV
SV
PV
SV
PV
SV
Key-lock
Run timer
Setting menu
Stop timer
READY mode
READY
band width
READY time
Offset mode
Offset
temperature
Recover
from power
failure
Anti-freezing
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
Data reset
Pump
accumulated
operating
time reset
Fun motor
accumulated
operating
time reset
Compressor
accumulated
operating
time reset
Key click sound
Temperature
unit
Pressure unit
PV
SV
PV
SV
PV
SV
Alarm
（The latest）
Alarm
Alarm display menu
Alarm
（The oldest）
PV
SV
PV
SV
PV
SV
Note) It changes only when the
alarm is generated.
PV
SV
PV
SV
PV
SV
PV
SV
Power supply ON
PV
SV
Press the
2 sec.
PV
SV
Electric
resistivity
PV
SV
SEL
Option
【drain pan set】
PV
SV
PV
SV
Electric
resistivity
Option
【electric
resistivity sensor
set】
SEL
Unused
PV
SV
Unused
Unused
PV
SV
PV
SV
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
MENU
MENU
Press the
2 sec.
MENU
Press the
2 sec.
MENUMENU MENU
Fig 1.3-1 Key operation (1/2)

HRX-OM-M091
Chapter 1 Read before using
HRS Series 1.3 Key operations
1-5
MENU
Changing of
contact input 1
signal
detection
Alarm
buzzer
sound
Changing of
low tank
level
Changing of
circulating fluid
discharge
temperature rise
Detection
temperature for
circulating fluid
discharge
temperature rise
Changing of
circulating fluid
discharge
temperature drop
Detection
temperature for
circulating fluid
discharge
temperature drop
Changing of
circulating fluid
discharge pressure
rise
Detection pressure
for circulating fluid
discharge pressure
rise
Changing of
communicati
on error
The monitoring
time of
communication
error
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
Changing of
circulating fluid
discharge pressure
drop
Detection pressure
for circulating fluid
discharge pressure
drop
PV
SV
PV
SV
PV
SV
PV
SV
Changing of
contact input 2
signal
detection
PV
SV
PV
SV
Changing of
DI level rise
Upper limit
of DI level
rise
Changing of
DC line fuse
cut
Changing of
water
leakage
PV
SV
PV
SV
PV
SV
Lower limit
of DI level
drop
Changing of
DI level drop
PV
SV
PV
SV
PV
SV
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
Press the
2 sec.
MENU
Alarm setting
menu
MENU
Communicati
on mode
Serial
protocol
Communication
specifications
RS-485
terminal
Slave
address
（MODBUS）
Communicati
on speed
（MODBUS）
Slave address
（Simple
communicatio
n protocol）
Communication
speed
（Simple
communication
protocol）
Response
delay time
（Simple
communication
protocol）
Communicati
on range
（Simple
communicati
on protocol）
MENU
BCC
（Simple
communicatio
n protocol）
Data length
（Simple
communicati
on protocol）
Parity check
（Simple
communicati
on protocol）
Stop bit length
（Simple
communicatio
n protocol）
Digital input
signal 1
Digital input
signal 1 type
Digital input
signal 2
Digital input
signal 2 type
Digital output
1 function
Digital output
1 operation
Digital output
1 selected
alarm
Digital output
2 function
Digital output
3 selected
alarm
Digital output
2 operation
Digital output
2 selected
alarm
Digital output
3 function
Digital output
3 operation
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
PV
SV
SV
Press the
2 sec.
Contact input
signal 1 Delay
timer (time
delay) of
reading
Contact input
signal 2 OFF
Detection
timer
PV
SV
PV
SV
Contact input
signal 2
Delay timer
(time delay)
of reading
Contact input
signal 2 OFF
Detection
timer
PV
SV
PV
SV
Communication
setting menu
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
SEL
PV
MENU
This manual explains the ''Communication setting menu''.
SEL
PV
SV
PV
SV
SEL
PV
SV
SEL
SEL
Temperature
alarm
Monitoring
method
Monitoring
start timer
Range over
Detection timer
Fig 1.3-2 Key operation (2/2)

HRX-OM-M091
Chapter 1 Read before using
1.4 Parameters HRSSeries
1-6
1.4 Parameters
Table 1.4-1 ‘’Parameters’’ explains the parameters of the 「communication
setting menu」.
Table 1.4-1 Parameters
Display Item Initial value
(Default setting)
Reference
page Category
Communication mode LOC
2.4
4.3
5.3
Serial protocol MDBS 4.3
5.3
Communication
specifications 485 4.3
5.3
RS-485 terminal OFF 4.3
5.3
Slave address 1
Mo
db
us Communication speed 19.2 4.3
Slave address 1
Communication speed 9.6
BCC ON
Data length 8BIT
Parity check NON
Stop bit length 2BIT
Response delay time 0
Serial communication
Simple
communication
p
rotocol
Communication range RW
5.3
Contact input signal 1 RUN
Contact input signal 1 type ALT
Contact input signal 1 delay
timer (time delay) of reading 0
Contact input signal 1 OFF
detection timer 0
Contact input signal 2 OFF
Contact input signal 2 type ALT
Contact input signal 2 delay
timer (time delay) of reading 0
Contact input signal 2 OFF
detection timer 0
Contact output 1 function RUN
Contact output 1 operation A
Selected for contact output 1 AL.01
Contact output 2 function RMT
Contact output 2 operation A
Selected for contact output 2. AL.01
Contact output 3 function ALM
Contact output 3 operation B
Contact input/output communication
Selected for contact output 3 AL.01
2.4
Communication
setting menu

HRX-OM-M091
Chapter 2 Contact input/output communication
HRS Series 2.1 Precautions for communication
2-1
Chapter 2 Contact input/output
communication
The device is equipped with a terminal which runs/stops the product. It is
also equipped with a terminal which picks up operation signals, alarm signals
and setting condition.
The device starts contact input/output communication according to the
setting of the operation display panel. Contact input/output communication
can be customized by changing the settings. Table 2-1 ‘’Customizable
content’’ shows the contents which can be changed by the operation display
panel.
Table 2-1 Customizable content
Signal Can be changed
Contact input/output signal（2pcs.）Signal configuration（Alternate/Momentary）
Contact input/output signal（3pcs.）Type of signal, signal operation（N.O type / N.C type）
2.1 Precautions for communication
2.1.1 Precautions wiring communication
○Communication wiring
A communication cable that connects the product and customer system is
not included with the product. Please prepare a cable, referring to 2.3
‘’Terminal block explanation (The connector is included.) In order to avoid
malfunction, do not connect to any place other than those shown in 2.3
‘’Terminal block explanation.
○Power supply
To use the power of the product, the total load current must be 500mA or
less.
If the load is 500mA or more, the internal fuse is cut to protect the product
and the alarm [AL21 DC line fuse cut] is generated. Refer to the “Installation
/ Operation” of the operation manual for alarms.
Optional parts needs to be adjusted so that the total load is 500mA or less
referring the table below.
Table 2-1-1 Current consumption of optional parts
No. Name Part NO Current
consumption
1 Drain pan set(with water leakage sensor) HRS-WL001 25mA
2 Drain pan set(with water leakage sensor) HRS-WL002 25mA
3 Electric resistivity sensor set HRS-DI001 100mA
2.1.2 Precautions after wiring and before communication
○Check or set the communication mode by the operation display panel.
・Communication mode shall be DIO.
Other modes can perform reading, but only DIO mode can perform writing.

HRX-OM-M091
Chapter 2 Contact input/output communication
2.2 Communicationspecification HRSSeries
2-2
2.2 Communication specification
Table 2.2-1 DIO Communication specification
Item Specification
Connector type (for this product) MC 1,5/12-GF-3,5
Insulation system Photo coupler
Rated input voltage DC24V
Used input voltage DC 21.6V to 26.4V
Rated input current 5mA TYP
Contact input
signal
Input signal 4.7kΩ
Rated load voltage AC48V or less/DC30V or lessContact output
signal Maximum load current AC/DC 500mA (Resistance load)
Output voltage DC24V±10％0.5A MAX
2.3 Terminal block explanation
This part explains the terminal block of the contact input/output
communication. A communication cable that connects the product and
customer system is not included with the product. Prepare a cable, referring
to Table 2.3-1 and Fig 2.3-1. Use the connector included as an accessory.
Table 2.3-1 Terminal explanation
Terminal
no Application Division Default setting Setting available
1 Common of contact output signal 3
2 Contact output signal 3 Output Alarm signal（N.C type）○
3 Common of contact output signal 2
4 Contact output signal 2 Output Remote signal（N.O type）○
5 Common of contact output signal 1
6 Contact output signal 1 Output Run status signal（N.O type）○
7 Common of contact input signal 2
8 Contact input signal 2 Input None ○
9 Common of contact input signal 1
10 Contact input signal 1 Input Run/stop signal（Alternate）○
11 24V COM output Output
12 DC 24V output Output

HRX-OM-M091
Chapter 2 Contact input/output communication
HRS Series 2.3 Terminal block explanation
2-3
4.7kΩ
This product Your system
Internal circuit
DC24V
Contact output signal 3
10
6
Contact input signal 1
Contact output signal 1
Contact output signal 2
12
11
24VCOM
9
8
7
5
4
3
2
1
Contact input signal 2
DC24V output
24VCOM output
1kΩ
4.7kΩ
1kΩ
Alarm signal
Run/stop signal
Run status signal
Remote signal
－
Signal description Default setting
Fig 2.3-1 Example of connector connection
Fig 2.3-2 Attached connector and terminal no (Example)
Fig 2.3-3 Wiring of the external switch (NPN open collector output) (Example)
Fig 2.3-4 Wiring of the external switch (PNP open collector output) (Example)
Terminal no.1
Terminal no.12
Wire the communication
cable to the connector
included as an
accessory.
Connect the remote control cable and the switch
to the connector for the contact input/output,
supplied as an accessory. Then, mount the
ferrite core (3 turn) supplied as an accessory.
(This is an example of wiring.)
Terminal no.1
Terminal no.12
Wire the communication
cable to the connector
included as an
accessory.
Brown (DC 24V)
Blue
(DC COM)
Black
(Output 1)
Flow switch
Terminal no.1
Terminal no.12
Wire the communication
cable to the connector
included as an
accessory.
Brown (DC 24V)
Blue
(DC COM)
Black
(Output 1)
Flow switch

HRX-OM-M091
Chapter 2 Contact input/output communication
2.4 Setting and checking HRS Series
2-4
2.4 Setting and checking
2.4.1 Setting and checking
The table below explains the setting items of the contact input/output signal
and the initial values.
Table 2.4-1 List of set communication items
Display Item Contents Initial value
(Default setting)
Communication mode Sets communication mode of this product. LOC
Contact input signal 1 Setting contact input signal 1 of the contact
input/output communication. RUN
Contact input signal 1 type
Setting input type of contact input signal 1 of the
contact input/output communication. [----] is
displayed when the setting of contact input signal 1 is
OFF.
ALT
Contact input signal 1 delay
timer of reading
Sets the delay timer of reading of contact input signal
1 of the contact input/output communication. Used
when the setting of the contact input signal 1 is
SW_A or SW_B. [----] is displayed when the setting of
the contact input signal 1 is not SW_A or SW_B.
-
Contact input signal 1 OFF
Detection timer
Sets the OFF detection timer of contact input signal 1
of the contact input/output communication. Used
when the setting of the contact input signal 1 is
SW_A or SW_B. [----] is displayed when the setting of
the contact input signal 1 is not SW_A or SW_B.
-
Contact input signal 2 Setting contact input signal 2 of the contact
input/output communication. OFF
Contact input signal 2 type
Setting input type of contact input signal 2 of the
contact input/output communication. [----] is
displayed when the setting of contact input signal 2 is
OFF.
ALT
Contact input signal 2 delay
timer of reading
Sets the delay timer of reading of contact input signal
2 of the contact input/output communication. Used
when the setting of the contact input signal 2 is
SW_A or SW_B [----] is displayed when the setting of
the contact input signal 2 is not SW_A or SW_B.
-
Contact input signal 2 OFF
Detection timer
Sets the OFF detection timer of contact input signal 2
of the contact input/output communication. Used
when the setting of the contact input signal 2 is
SW_A or SW_B. [----] is displayed when the setting of
the contact input signal 2 is not SW_A or SW_B.
-
Contact output 1 function Setting output signal function of contact output 1 of
the contact input/output communication. RUN
Contact output 1 operation Setting output signal operation of contact output 1 of
the contact input/output communication. A
Contact output 1 selected
alarm
Setting selected alarm of contact output 1 of the
contact input/output communication. [----] is
displayed when the setting of the output signal of
contact output1 is not selected alarm signal.
AL.01
Contact output 2 function Setting output signal function of contact output 2 of
the contact input/output communication. RMT
Contact output 2 operation Setting output signal operation of contact output 2 of
the contact input/output communication. A
Contact output 2 selected
alarm
Setting selected alarm of contact output 2 of the
contact input/output communication. [----] is
displayed when the setting of the output signal of
contact output2 is not selected alarm signal.
AL.01
Contact output 3 function Setting output signal function of contact output 3 of
the contact input/output communication. ALM
Contact output 3 operation Setting output signal operation of contact output 3 of
the contact input/output communication. B
Contact output 3 selected
alarm
Setting selected alarm of contact output 3 of the
contact input/output communication. [----] is
displayed when the setting of the output signal of
contact output3 is not selected alarm signal.
AL.01

HRX-OM-M091
Chapter 2 Contact input/output communication
HRS Series 2.4 Setting and checking
2-5
If the communication mode is set to [DIO] first while the operating
signal is input, the product will start and feed the circulating fluid
before the details are set.
For safety, set the communication mode to [DIO] after carrying out the
setting below.
2.4.2 Setting and checking
Communication mode Setting and checking
1. Press and hold the [MENU] key for 2 sec.
Repeat pressing the key until the setting screen for communication mode [ ] appears
on the digital display.
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2. Select【LOC】from the [▲] key , and confirm by pressing “SEL”.
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Table 2.4-2 List of set values
Set values Explanation Initial value
(Default setting)
Sets LOCAL mode. ○
Sets DIO mode.∗1
Sets SERIAL mode. ∗2
∗1：When the setting of the contact input 1 is “External switch signal”, “DIO mode”
cannot be set.
∗2：If the serial protocol is “Simple communication protocol 2” and the contact input 1 is
“external switch signal” or contact input 2 is “remote signal”, “SERIAL mode”
cannot be set.
［MENU］
Press and
hold
［MENU］
Press and
hold
［MENU］
Press and
hold
［MENU］
Press and
hold

HRX-OM-M091
Chapter 2 Contact input/output communication
2.4 Setting and checking HRS Series
2-6
Contact input signal1 Setting and checking
3. Display the screen of contact input signal 1 by pressing the [SEL] key several times.
The set screen of contact input signal 1 is displayed on the digital display.
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4. Select contact input signal 1 from the table below with [▲] key or [▼] key, and confirm by
pressing “SEL”.
Table 2.4-3 List of set values
Set values Explanation Initial value
(Default setting)
Without input signal
Input of run/Stop signal ○
External switch signal input(N.O. type)∗3,∗4
External switch signal input (N.C. type) ∗3,∗4
∗3：When the setting of the communication mode is “DIO mode”, “External switch signal”
cannot be set.
∗4：When the setting of the communication mode is “SEIRAL mode” and the protocol
setting is “Simplified communication protocol 2”, “External switch signal” cannot be
set.
Contact input signal 1 type Setting and checking
5. Press the [SEL] key once.
The set screen of contact input signal 1 type is displayed on the digital display.
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6. Select contact input signal 1 type from the table below with [▲] key or [▼] key, and confirm
by pressing “SEL”.
Table 2.4-4 List of set values
Set values Explanation Initial value
(Default setting)
Setting/checking are not available if the
setting of contact input signal 1 is OFF.
Alternate signal ○
Momentary signal
Momentary signal∗5
∗5：Used when the setting of the contact input 1 is “Operation stop signal input”.

HRX-OM-M091
Chapter 2 Contact input/output communication
HRS Series 2.4 Setting and checking
2-7
Contact input signal 1 delay timer of reading Setting and checking
7. Press the [SEL] key once.
The set screen of the contact input signal 1 delay timer of reading is displayed on the digital
display.
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8. Select contact input signal 1 delay timer of reading from the table below with [▲] key or [▼]
key, and confirm by pressing “SEL”.
Table 2.4-5 List of set value
Set value Explanation Initial value
(Default setting)
Setting and checking are not available unless
contact input signal 1 is external switch signal
input (N.O. type or N.C. type).
to
Setting of contact input signal 1 delay timer of
reading.
Set range is 0 to 300 sec.
Contact input signal 1 OFF detection timer Setting and checking
9. Press the [SEL] key once.
The set screen of the contact input signal 1 OFF detection timer is displayed on the digital
display.
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10.Select contact input signal 1 OFF detection timer from the table below with [▲] key or [▼]
key, and confirm by pressing “SEL”.
Table 2.4-6 List of set value
Set value Explanation Initial value
(Default setting)
Setting and checking are not available unless
contact input signal 1 is external switch signal
input (N.O. type or N.C. type).
to
Setting of contact input signal 1 OFF
detection timer
Set range is 0 to 10sec.

HRX-OM-M091
Chapter 2 Contact input/output communication
2.4 Setting and checking HRS Series
2-8
Contact input signal 2 Setting and checking
11.Press the [SEL] key once.
The set screen of contact input signal 2 is displayed on the digital display.
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12.Select contact input signal 2 from the table below with [▲] key or [▼] key, and confirm by
pressing “SEL”.
Table 2.4-7 List of set values
Set values Explanation Initial value
(Default setting)
Without input signal ○
Input of run/stop signal
External switch signal input(N.O. type)
External switch signal input (N.C. type)
Remote signal∗6
∗6：When the setting of the serial protocol is “Simplified communication protocol 2”,
“Remote signal” cannot be set.
Contact input signal 2 type Setting and checking
13.Press the [SEL] key once.
The set screen of contact input signal 2 type is displayed on the digital display.
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14.Select contact input signal 2 type from the table below with [▲] key or [▼] key, and confirm
by pressing “SEL”.
Table 2.4-8 List of set values
Set values Explanation Initial value
(Default setting)
Setting/checking are not available if the
setting of contact input signal 2 is OFF.
Alternate signal ○
Momentary signal∗7
∗7:Can be set when the setting of contact input signal 2 is "Run/Stop signal input" or "Remote
signal"

HRX-OM-M091
Chapter 2 Contact input/output communication
HRS Series 2.4 Setting and checking
2-9
Contact input signal 2 delay timer of reading Setting and checking
15.Press the [SEL] key once.
The set screen of contact input signal 2 delay timer of reading is displayed on the digital
display.
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16.Select contact input signal 2 delay timer of reading from the table below with [▲] key or [▼]
key, and confirm by pressing “SEL”.
Table 2.4-9 List of set values
Set values Explanation Initial value
(Default setting)
to
Setting of contact input signal 2 delay timer
of reading.
Set range is 0 to 300 sec.
Contact input signal 2 OFF detection timer Setting and checking
17.Press the [SEL] key once.
The set screen of contact input signal 2 OFF detection timer is displayed on the digital
display.
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18.Select contact input signal 2 OFF detection timer from the table below with [▲] key or [▼]
key, and confirm by pressing “SEL”.
Table 2.4-10 List of set values
Set values Explanation Initial value
(Default setting)
Setting and checking are not available unless
contact input singal 2 is external switch signal
input(N.O. type or N.C. type).
to
Setting of contact input signal 2 OFF
detection timer.
Set range is 0 to 10 sec.

HRX-OM-M091
Chapter 2 Contact input/output communication
2.4 Setting and checking HRS Series
2-10
Contact output signal 1 function Setting and checking
19.Press the [SEL] key once.
The set screen of contact output signal 1 function is displayed on the digital display.
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20.Select contact output signal 1 function from the table below with [▲] key or [▼] key, and
confirm by pressing “SEL”.
Table 2.4-11 List of set values
Set values Explanation Initial value
(Default setting)
Without output signal
Signal of operating status is output ○
Signal of remote status is output
Signal for completion of preparation (TEMP
READY)
Signal for the status of the operation stop alarm
is output
Signal for the status of the operation continue
alarm is output
Signal for the alarm status is output
Signal for selected alarm status is output
Signal for Run timer set status is output
Signal for Stop timer set status is output
Signal for the recovery from power failure is
output
Signal for anti-freezing setting is output
Pass through signal of contact input signal 1
Pass through signal of contact input signal 2
Signal output during automatic fluid filling
Contact output signal 1 operation Setting and checking
21.Press the [SEL] key once.
The set screen of contact output signal 1 operation is displayed on the digital display.
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