SMC Networks HRL100-A, HRL300-A, HRL200-A Operation Manual

HRX-OM-W069

Thermo-chiller

Air-Cooled refrigerated type

HRL100-A
HRL200-A
HRL300-A

Operation Manual

Communication function

Keep this manual available whenever necessary

© 2019 SMC CORPORATION All Rights Reserved

To Users,

Note: This manual is subject to possible change without prior notice.

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 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.

HRX-OM-W069

Contents

Contents

Chapter 1 Read before using ............................................................ 1-1

1.1 Operation mode and operation method ................................................................. 1-1

1.2 Change of operation mode ..................................................................................... 1-3

1.3 Communication port ............................................................................................... 1-4

1.4 Touch panel flow ..................................................................................................... 1-5

Chapter 2 Contact input/output communication /Analog 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 ............................................................ 2-2

2.2 Communication specification ................................................................................. 2-2

2.3 Contact input signal ................................................................................................ 2-5

2.3.1 Setting of contact input signal type and form ....................................................................... 2-5

2.3.2 Run/stop・Run・Stop・External switch signal ......................................................................... 2-7

2.3.3 External switch signal ........................................................................................................... 2-8

2.4 Contact output signal ............................................................................................ 2-10

2.4.1 Contact output signal 1 to 3 ...............................................................................................2-10

2.4.2 Contact output signal 4 to 6 ............................................................................................... 2-11

2.5 Analog output signal ............................................................................................. 2-14

Chapter 3 Serial communication ...................................................... 3-1

3.1 Precautions wiring communication ....................................................................... 3-1

3.2 Connected explanation ........................................................................................... 3-1

3.3 Communication specification ................................................................................. 3-2

3.4 MODBUS communication function ........................................................................ 3-3

3.5 Precautions for communication ............................................................................. 3-4

3.5.1 Precautions after wiring and before communication ............................................................ 3-4

3.5.2 Precautions for communicating ............................................................................................ 3-4

3.6 Setting method ........................................................................................................ 3-5

3.7 Communication sequence ...................................................................................... 3-7

3.8 Message configuration ........................................................................................... 3-7

3.8.1 Message frame .................................................................................................................... 3-7

3.9 Function codes ........................................................................................................ 3-9

3.10 Checksum calculation method ............................................................................... 3-9

3.10.1 LRC(ASCII) .......................................................................................................................... 3-9

3.10.2 CRC(RTU) ..........................................................................................................................3-10

3.11 Explanation of function codes ............................................................................. 3-12

3.11.1 Function code：04 Reading multiple registers ....................................................................3-12

3.11.2 Function code：06 Writing registers ....................................................................................3-14

3.11.3 Function code：16 Writing multiple registers ......................................................................3-15

3.12 Negative response ................................................................................................ 3-16

HRL Series

HRX-OM-W069
Contents

3.13 Register Map ................................ ................................................................ .......... 3-18

3.13.1 Circulating fluid discharge temperature ............................................................................. 3-19

3.13.2 Circulating fluid electrical conductivity ............................................................................... 3-19

3.13.3 Circulating fluid discharge pressur .................................................................................... 3-19

3.13.4 Circulating fluid flow rate ................................................................................................... 3-19

3.13.5 Status flag .......................................................................................................................... 3-20

3.13.6 Alarm flag........................................................................................................................... 3-21

3.13.7 Data display ....................................................................................................................... 3-22

3.13.8 Circulating fluid set temperature ........................................................................................ 3-22

3.13.9 Operation instruction ......................................................................................................... 3-23

3.13.10 Data instruction .................................................................................................................. 3-23

Chapter 4 Communication alarm function ...................................... 4-1

4.1 Communication alarm occurs ................................................................................. 4-1

4.2 Communication alarm reset .................................................................................... 4-2

4.3 Setting method ......................................................................................................... 4-2

HRL Series

1-1

Chapter 1 Read before using

Contact input/output communication /
Analog 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.

Serial
communication

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.

・Displays the current operation mode.
・You can change the operation mode

by pressing it.

The communication of this device consists of contact input/output
communication and analog output communication and serial
communication.

・ The serial communication protocol is a MODBUS communication.

Depending on the customer’s specification, communication can

be changed to contact input/output communication or serial
communication.

Table 1-1 Communication method

HRX-OM-W069

Chapter 1 Read before using

●If using contact input/output communication, refer to
chapter 2.

●If using serial communication MODBUS, refer to chapter

3.

1.1 Operation mode and operation method

LOCAL, DIO and SERIAL are available as the operation modes. Table

1.1-1 explains the operation modes. The default setting is LOCAL.

The operation method depends on the operation mode. Table 1.1-2
shows how the operation mode and method of operation are related.

Operation mode display and setting

HRL Series 1.1 Operation mode and operation method

HRX-OM-W069

1-2

Operation ode

Explanation

Contents

Display

LOCAL

Run / stop and circulating
fluid temperature setting are
possible with the touch panel.

Set the operation
mode to "LOCAL".

To display
the "LOCAL"

DIO

Run / stop by contact input.
Circulating fluid temperature
setting is done at the touch panel.

Set the operation
mode to "DIO".

To display
the "DIO"

SERIAL

Run / stop and circulating
fluid temperature setting are
possible with the serial
communication(RS-232C,RS-485)

Set the operation
mode to "SERIAL".

To display
the "SERIAL"

DIO

Run/Stop

Run / stop by contact input.
Set circulating fluid temperature
by serial communication.

Set to "SERIAL"
mode and set "DIO
Run / Stop" in
"Serial Setting" to
"ON" (enabled).

To display
the "SERIAL
(DIO Run)".

Operation mode

Operation

LOCAL

DIO

SERIAL

DIO

Run/Stop

Touch panel

Run/Stop

○ × ×

×

Touch panel

Circulating fluid
temperature setting

○ ○ ×

×

Touch panel

Settings other than
circulating fluid
temperature setting

○ ○ ○

○

Touch panel

Condition reading

○ ○ ○

○

Contact input/output
communication

Run/Stop

× ○ ×

○

Contact input/output
communication

Condition reading

○

○1 ○ ○1

Reading of the external switch

○ ○ ○

○

Serial communication

Run/Stop

× × ○

×

Serial communication

Circulating fluid
temperature setting

× × ○

○

Serial communication

Condition reading

○ ○ ○

○

Chapter 1 Read before using

Table 1.1-1 Operation modes.

Table 1.1-2 Operation mode and operation

1 Only one external switch can be connected

1.1 Operation mode and operation method

HRL Series

1-3

Operation mode

Operation mode change method

LOCAL

None1

DIO

Input the mode request signal (OFF to ON) to contact input 3.

SERIAL

The mode request flag is turned from OFF to ON by serial
communication.2

LOCAL DIO SERIAL LOCAL

Contact input 3

Mode request signal

Serial communication

Mode request flag

Select the LOCAL in the touch panel

Operation

mode

LOCAL DIO SERIAL DIO SERIAL

Contact input 3

Mode request signal

Serial communication

Mode request flag

Operation

mode

HRX-OM-W069

Chapter 1 Read before using

1.2 Change of operation mode

There are the following methods to change the operation mode.

・ Change by touch panel
・ Change by mode request

■About mode request

The mode request, is the ability to change the operation mode by the
contact input or serial communication.
When switching from OFF to ON for both contact input and serial
communication, the mode request becomes effective and the
operation mode changes.

Table 1.2-1 Operation mode change by mode request

1 Change to LOCAL mode is possible only from touch panel operation.
2 When "DIO Run / Stop" is set in advance by the touch panel, run / stop is performed by the contact

input signal.

Fig. 1-1 Communication port

Fig.1-2 Mode switching by the mode request (ON state mixed)

HRL Series 1.2 Change of operation mode

HRX-OM-W069

1-4

Contact input / output

signal connector

D sub 25 female pin

(socket) type

Serial communication

connector

D sub 9 female pin

(socket) type

13

1

25

14

5

1

9

6

Chapter 1 Read before using

1.3 Communication port

The communication port In the lower left of the electrical component
box is used for communication.
Fig.1-3 shows the location of the communication port.

Fig.1-3 Communication port

1.3 Communication port

HRL Series

1-5

1.4 Touch panel flow

Menu

1. Communication error (AL34)

Detection of contact input signal
Setting for alarm (AL30 and AL31)

3. Analog output setting

4. Setting for contact
input signal 1 to 3

2. Serial communication setting

5. Setting for contact

output signal 1 to 3

6. Setting for contact

output signal 4 to 6

Various screens

Press the [Comm. Setting] on the menu, make the communication
settings from the various setting screens.

Fig.1-4 Communication setting touch panel flow

HRX-OM-W069

Chapter 1 Read before using

HRL Series 1.4 Touch panel flow

HRX-OM-W069

1-6

Chapter 1 Read before using

1.4 Touch panel flow

HRL Series

Chapter 2 Contact input/output communication /Analog output communication

2-1

Signal content

Contact input 1

Contact input 2

Contact input 3 Mode request signal only (momentary)

Contact output 1

・Output operation status (RUN / STOP) signal *1
・Selectable contact type (normally open / normally closed)

Contact output 2

・Output the operation stop "FLT" alarm signal *1
・Selectable contact type (normally open / normally closed)

Contact output 3

・Output the continued operation "WRN" alarm signal *1
・Selectable contact type (normally open / normally closed)

Contact output 4

Contact output 5

Contact output 6

Analog output 1

Analog output 2

Signal

Contact input

3pcs.

・Operation / stop signal, Allowed input an external switch signal
・Selectable signal configuration (Alternate/Momentary)
・Selectable contact type (normally open / normally closed)

Contact output

6 pcs.

・Selectable signal content(Refer to “2.4 Contact output signal)
・Selectable contact type (normally open / normally closed)

Analog output

2pcs.

Selectable from the following 3 points

・CH1 Circulating fluid discharge temperature
・CH2 Circulating fluid discharge temperature
・CH2 Circulating fluid electric conductivity

Chapter 2 Contact input/output

communication /Analog
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. The contact input / output signals and analog output signals
that this product is equipped with are shown in Table 2-1.

Table 2-1 Contact input / output signal and analog output signal

HRX-OM-W069

1 Signal the contents of the contact output 1 to 3 is a fixed value.

It is not possible to change the content of the signal.

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 according to
“3.2 Connected explanation”.In order to avoid malfunction, do not
connect to any place other than those shown in “3.2 Connected
explanation”.

HRL Series 2.1 Precautions for communication

HRX-OM-W069

2-2

Connector specification (this product side)

Dsub 25 pin female (socket) type

Item

Specification

Contact
input
signal1,2,3

Insulation system

Photo coupler

・Run/Stop signal
・External switch signal
・Operation mode request

signal

(Contact input 3 fixed)
Rated input voltage

DC24V

Operating voltage
range

DC21.6V to 26.4V

Rated input
current

5mA TYP

Input impedance

4.7kΩ

Contact output
signal
1,2,3,4,5,6

Rated load voltage

AC48V or less /
DC30V or less

・Signal of operating status
・Alarm signal
・TEMP READY signal

etc 2

Maximum load
current

AC/DC
800mA or less 1

Minimum load current

DC5V 10mA

Analog output
signal 1,2

Output voltage range

0V to +10V

・CH1 Circulating fluid

discharge temperature

・CH2 Circulating fluid

discharge temperature

・CH2 Circulating fluid

electric conductivity

Maximum output
current

10mA

Maximum accuracy

±1.0%F.S. or less
DC24V output voltage

DC24V±10% 200mA MAX 1

(It can not be used for inductive load.)

Chapter 2 Contact input/output communication /Analog output communication

○Power supply
To use the power of the product, the total load current must be 200mA

or less.

2.1.2 Precautions after wiring and before communication

○Check or set the Operation mode by the touch panel.

・Operation mode shall be DIO.

You can read also in the other mode, but you can not run / stop if it
is not DIO mode.

2.2 Communication specification

Table 2.2-1 Contact input/output communication connector

Table 2.2-2 Contact input/output/ analog output communication specification

1 : The total load current must be 800 mA or less. To use the power of the device, the total load current

must be 200 mA or less.

2 : Refer to “2.4.2 Contact output signal 4 to 6”.

2.2 Communication specification

HRL Series

Chapter 2 Contact input/output communication /Analog output communication

2-3

PIN
No.

Item

Division

Contents

1

DC24V output

Output

－

2

DC24V input

Input

－

3

Contact input signal 1

Input

Run/Stop 1

4

Contact input signal 3

Input

Operation mode request signal (fix )2

5

Contact output signal 6

Output

OFF1

6

Contact output signal 1

Output

Run status signal [N.O type](fix)2

7

Contact output signal 3

Output

Operation continuation[WRN]alarm

status signal [N.C. type ](fix)2

8

Contact output signal 5

Output

OFF1

9

None

－

Can not connect

10

Analog output signal 2

Output

CH2 Circulating fluid electric

conductivity signal 1

11

Analog output signal 1

Output

CH2 Circulating fluid discharge

temperature signal 1

12

None

－

Can not connect

13

None

－

Can not connect

14

24 COM output
(Common of contact input
signal)

Output

－

15

Common of contact
output signal 1, 2, 3, 4, 5

Output

－

16

Contact input signal 2

Input

External switch signal 1

17

None

－

Can not connect

18

Common of contact
output signal 6

Output

－

19

Contact output signal 2

Output

Operation stop [FLT] alarm status signal

[N.C. type ](fix)2

20

Contact output signal 4

Output

OFF*1

21

None

－

Can not connect

22

Common of contact
output signal 2

Output

CH2 Circulating fluid electric

conductivity GND

23

Common of contact
output signal 1

Output

CH2 Circulating fluid discharge

temperature GND

24

None

－

Can not connect

25

None

－

Can not connect

Table 2.2-3 Contact input/output communicatin /Analog output pin number

HRX-OM-W069

1 : It is possible to change the setting.
2 : You can not change the setting(“N.O type / N.C. type” can be changed).

HRL Series 2.2 Communication specification

HRX-OM-W069

2-4

Power supply usage example

Analog output 1 : CH2 Circulating fluid discharge temperature

This product side Customer system side

DC24V

+

-

-15V

100Ω

ANALOG COM

24COM

Contact output 1 : Operation status

1

24COM

DC +24V(output)

4.7kΩ

4.7kΩ

4.7kΩ

+15V

+

-

-15V

100Ω

+15V

ANALOG COM

Internal

circuit

14

3

16

4

6

19

7

20

8

15

5

18

11

23

10

22

Contact output 2 : "FLT"

Contact output 3 : "WRN"

Contact output 4 : OFF

Contact output 5 : OFF

(Momentary)

Run／Stop

Operation mode request

［Warning when an alarm occurs OFF]

［Fault when an alarm occurs OFF]

［Operation ON]

Contact output 6 : OFF

2

DC24V

DC +24V(input)

EXT DC24V

EXT 24COM

Power
supply

Analog output 2 : CH2 Circulating fluid electric conductivity

External switch

24COM(output)

Contact output 1-5 common

Contact output 6 common

Analog output1common

Analog output 2 common

When using this product's power supply,
connect pin 1 to pin 2 and the COM side
of each contact input signal to pin 14.

When using a customer's power
supply, connect the 24V DC +
side to pin 2 and the COM side
of each contact input signal to
the customer's power COM.

DC24V

1

14

3

2

1

14

3

2

Power

supply

DC24V
24COM

4

3
4

This product power supply
usage example

Customer power supply usage example

Chapter 2 Contact input/output communication /Analog output communication

2.2 Communication specification

Fig.2-1 Circuit diagram

HRL Series

Chapter 2 Contact input/output communication /Analog output communication

2-5

Setting of contact input signal form

(1)

(2)

(3)

2.3 Contact input signal

There are 3 contact input signals. Two of them can be customized by
the customer.

2.3.1 Setting of contact input signal type and form

The type of contact input signal can be set from the “1.4 Touch panel flow” (Refer
to "4. Contact input signal form" screen).

Following items can be set for contact input signal 1 and 2:

・ Contact type––selects [ N.O. ] (A contact) or [N.C] (B contact)
・ Signal form–––selects [ALT] (alternate) or [MT] (momentary)
・ Signal type–––selects “OFF” (disabled), “external switch” (external switch

signal) or “run/stop” (run/stop) signal., Run (run) signal, Stop
(stop)signal

HRX-OM-W069

HRL Series 2.3 Contact input signal

HRX-OM-W069

2-6

No.

Indication

Item

Setting and selection

(1)

Input 1

Contact input
signal 1

Contact
type

1

A contact (normally open)

B contact
(normally closed)

Signal
form

1

Alternate

Momentary

Signal
type

[Off]

Disabled

[External Switch]

External switch signal

[Run/Stop] 1

Run/stop signal

[Run] 2

Run signal

(2)

Input 2

Contact input
signal 2

Contact
type

1

A contact (normally open)

B contact
(normally closed)

Signal
form

1

Alternate

Momentary

Signal
type

[Off]

Disabled

[External Switch] 1

External switch signal

[Run/Stop]

Run/stop signal

[Stop] 2

Stop signal

(3)

Input 3

Contact input
signal 3 3

Contact
type

1

A contact (normally open)

B contact
(normally closed)

Chapter 2 Contact input/output communication /Analog output communication

Table 2.3-1 Setting of contact input signal form

1 : By default.
2 : This setting assigns “run” signal to “contact input 1” and “stop” signal to “contact input 2”.
3 : The signal form of contact input 3 is “momentary”.

2.3 Contact input signal

HRL Series

2-7

OFF

ON

Run

Stop

Product condition

Run/stop signal
（Alternate）

O

FF

ON

Run

Stop

Product condition

Run/stop signal
(Momentary)

O

FF

ON

Run

Stop

Product condition

Run signal

O

FF

ON

Stop signal

②

①

③

Chapter 2 Contact input/output communication /Analog output communication

2.3.2 Run/stop・Run・Stop・External switch signal

1) Run/stop signal (Signal type: Alternate)
The product keeps operating while the input signal from the customer is ON.

2) Run/stop signal (Signal type: Momentary)

The state changes when the input signal from the customer goes ON. This signal
operates while the product is stopped, and stops while the product is being operated.

3) Run signal (Signal type: Alternate) /Stop signal (Signal type：Alternate)

Digital input signal 1 is for Run signal（Signal type：Alternate）, digital input signal 2 is
for stop signal(Signal type: Alternate). Stop signal becomes valid when both signals are
turned ON.

(1) The product starts operation when the contact input signal 1 is turned ON.
(2) The product stops operation when the contact input signal 2 is turned ON.
(3) The product starts operation because the contact input signal 1 is turned ON

although the contact input signal 2 is OFF.

HRX-OM-W069

HRL Series 2.3 Contact input signal

HRX-OM-W069

2-8

“Delay” time

Monitoring method

0sec

Continuous monitoring

1 to 300sec

Monitoring during operation

O

FF

ON

Run

Stop

Product condition

O

FF

ON

External switch signal

[Off Detection] time

③

④ ① ②

Run/Stop signal

[Delay] time

Chapter 2 Contact input/output communication /Analog output communication

4) Digital input signal 1 is for Run/Stop signal (Signal type: Alternate), digital input signal
2 is for external switch signal (Signal type: Alternate).Refer to Chapter 2.3.3 for details of
the external switch.

(1) The product starts operation when the Run/Stop signal from the user is turned ON.
(2) It reads the signal of the external switch signal (N.O type) after the time which has

been set for the [Delay] time.

(3) When the external switch signal (N.O. type) has been turned off for the time set for

[Off Detection] time, it is recognized as OFF.

(4) Alarm [AL31:Contact input 2 signal detection] is generated. The operation of the

product stops.

(5) The product stops operation when the Run/Stop signal is turned OFF during

operation. Afterwards, the alarm is not generated even if the external switch signal
is turned OFF.

2.3.3 External switch signal

The product has two contact inputs available to detect the contact input signal.
This allows reading and monitoring the contact signal from an external switch.

When inputting an external switch signal to the contact input, select “External
Switch” (external switch signal) for the type of contact input signal.(Refer to
“2.3.1 Setting of contact input signal type and form”)

If an input from an external switch is detected, it can be generated as an
alarm.Options to select “continuous monitoring” or “monitoring during
operation” are available. Also, the detection start time after the start of
operation and the detection end time can be set.

・ If the signal of “contact input 1” is detected: the alarm “AL30: Detection

of contact input 1 signal” is activated.

・ If the signal of “contact input 2” is detected: the alarm “AL31: Detection

of contact input 2 signal” is activated.

・ “Delay” time: sets the start time to detect the contact input signal after

the start of operation.

・ “Off detect” time: sets the time between the detection of the contact input

OFF signal and the activation of the alarm.

Table 2.3-2 Monitoring method for contact input signal

2.3 Contact input signal

HRL Series

HRX-OM-W069

2-9

Run status of this product

Run

Stop

External switch

ON

OFF

Operation start

Signal reading

start

"Delay" time

"Off Detect" time

Alarm

generation

Operation
stops due to
the alarm.

“Delay” time and “off detect” time

(1)

(2)

(3)

Communication error, detection alarme

of contact input signal and setting

Chapter 2 Contact input/output communication /Analog output communication

Set "Delay" time, "Off Detect" time and "Operation at alarm occurrence" of

external switch signal from “1.4 Touch panel flow (Refer to "1. Communication
error (AL34), contact input signal detection alarm (AL30, AL31) setting"screen).

HRL Series 2.3 Contact input signal

You can select the operation of this product when an alarm occurs by the
contact input signal.

・ [WRN]–––Continue operation of the product when an alarm occurs
・ [FLT]–––Stop operation of this product when an alarm occurs

HRX-OM-W069

2-10

No.

Indication

Item

Setting and selection

Setting range

(1)

Comm.

Error

Alarm “AL34:
Communication
error”

Disabled

Waiting
time

30 to 600sec
30sec



Operation
continues during
the alarm

Operation stops
during alarm

(2)

Digital Input 1

Alarm “AL30:
Detection of contact
input 1 signal”

Disabled

Delay

0 to 300sec
0sec

Operation
continues during
the alarm

Off Detect

0 to 10sec
0sec



Operation stops
during alarm

(3)

Digital Input 2

Alarm “AL31:
Detection of contact
input 2 signal”

Disabled

Delay

0 to 300sec
0sec

Operation
continues during
the alarm

Off Detect

0 to10sec
0sec



Operation stops
during alarm

(1)

(2)

(3)

Setting of contact output signal 1 to 3

Chapter 2 Contact input/output communication /Analog output communication

Table 2.3-3 Communication error, detection of contact input signal and operation setting

By default

2.4 Contact output signal

There are 6 contact output signals.The setting of the contact output
signal is done by the "5. Contact output signal 1 to 3 Setup" screen
and “1.4 Touch panel flow” (Refer to "6. Contact output signal 4 to 6
setting" screen).
Contact output signal 4 to 6 can be used to change the signal type.

2.4.1 Contact output signal 1 to 3

The contact type of contact output signals 1 to 3 can be set.
Contact output signal is continuously output.

2.4 Contact output signal

HRL Series

Chapter 2 Contact input/output communication /Analog output communication

2-11

No.

Indication

Item

Signal type

Setting and selection

(1)

Output 1

Contact output
signal 1

Operation status
signal



A contact
(normally open)

B contact
(normally closed)

(2)

Output 2

Contact output
signal 2

Operation stop
(FLT) alarm status
signal

A contact
(normally open)



B contact
(normally closed)

(3)

Output 3

Contact output
signal 3

Continuous
operation “WRN”
alarm status signal

A contact
(normally open)



B contact
(normally closed)

No.

Indication

Item

Signal type

Contact type

(1)

Output 4
Function

Contact output
signal 4

Select from “Table

2.4-3 Signal type for
contact output signal
4 to 6”  [OFF]



A contact (normally open)

B contact
(normally closed)

(2)

Output 5
Function

Contact output
signal 5



A contact (normally open)

B contact
(normally closed)

(3)

Output 6
Function

Contact output
signal 6



A contact (normally open)

B contact
(normally closed)

Setting of contact output signal 4 to 6

(1)

(2)

(3)

Selection of signal type

Table 2.4-1 Setting of contact output signal 1 to 3

 By default

2.4.2 Contact output signal 4 to 6

Contact output signal 4 to 6 can be set to "signal type", "contact form".

A “signal type” for contact output signal 4 to 6 can be selected by the

customer. Refer to “ Table 2.4-3 Signal type for contact output signals
4 to 6.“

HRX-OM-W069

Table 2.4-2 Setting of contact output signal 4 to 6

By default

HRL Series 2.4 Contact output signal

HRX-OM-W069

2-12

No. Indication Item Contact type Explanation

Normally open

Normally closed

Operation : closed

Stop : closed

DIO mode : closed

DIO mode : open

the time of alarm : closed

the time of alarm : open

the time of alarm : closed

the time of alarm : open

the time of alarm : closed

the time of alarm : open

Maintenance reminders occurred : closed

Maintenance reminders occurred : open

TEMP READY status : closed

TEMP READY status : open

TEMP READY status : closed

TEMP READY status : open

TEMP READY status : closed

TEMP READY status : open

11 EXTERNAL TEMP None － －

Enabled : closed

Enabled : open

Enabled : closed

Enabled : open

Enabled : closed

Enabled : open

Output the input signal as it is

Reverse output of the input signal

Output the input signal as it is

Reverse output of the input signal

Reverse output of the input signal

Selected alarm occurrence : closed

Selected alarm occurrence : open

Selected maintenance
reminders occurred : open

Maintenance reminders
status signal

Anti-freezing setting
status signal

Warming up setting
status signal

Pass through signal of the
contact input signal 1

Pass through signal of the
contact input signal 2

16

Digital Input 2

17

Mode Request Input

Selected maintenance
reminders occurred : closed

19

Select Maintenance
18

Select Alarm

About selectable maintenance reminders
Refer to "Table 2.4-5 List of maintenance reminders".

Output the input signal as it is

Selected alarm status signal
Refer to "Table 2.4-4 List of alarm selection" for selectable alarms.

Mode request input signal(DIO)
(Pass through signal of the
contact input signal 3)

13

ANTI-FREEZING

14

WARMING UP

15

Digital Input 1

10

TEMP OUT

TEMP OUT signal

12

START-UP

Startup setting
status signal

7

Maintenance

9

CH2 TEMP READY

CH2 TEMP READY signal

8

CH1 TEMP READY

CH1 TEMP READY signal

maintenance reminder
status signal

3

DIO Mode

DIO mode signal

4

Fault

5

Warning

Operation stop "FLT" alarm
status signal

Continuing operation “WRN”

alarm status signal

6

Alarm

alarm status signal

1

Off

Disableing

2

Run

Operation status signal

Chapter 2 Contact input/output communication /Analog output communication

Table 2.4-3 Signal type for contact output signal 4 to 6

2.4 Contact output signal

HRL Series

HRX-OM-W069

2-13

Alarm No.

Indication

Explanation

AL01

CH1 Low Level FLT

CH1 abnormal low tank fluid level

AL02

CH1 Low Level WRN

CH1 low tank fluid level

AL03

CH2 Low Level FLT

CH2 abnormal low tank fluid level

AL04

CH2 Low Level WRN

CH2 low tank fluid level

AL06

Fan Inverter

Fan failure

AL09

CH1 High Temp. FLT

CH1 abnormal rise of circulating

fluid temperature

AL10

CH1 High Temp.

CH1 circulating fluid temperature rise

AL11

CH1 Low Temp.

CH1 circulating fluid temperature drop

AL12

CH1 TEMP READY ALARM

CH1 TEMP READY alarm

AL13

CH2 High Temp. FLT

CH2 abnormal rise in circulating

fluid temperature

AL14

CH2 High Temp.

CH2 circulating fluid temperature rise

AL15

CH2 Low Temp.

CH2 circulating fluid temperature drop

AL16

CH2 TEMP READY ALARM

CH2 TEMP READY alarm

AL17

CH1 HX In High Temp. FLT

CH1 abnormal rise in heat exchanger

inlet temperature

AL18

CH1 Press. Sensor

CH1 failure of circulating fluid

discharge pressure sensor

AL19

CH1 High Press.

CH1 circulating fluid discharge pressure rise

AL20

CH1 Low Press.

CH1 circulating fluid discharge pressure drop

AL21

CH2 Press. Sensor

CH2 failure of circulating fluid

discharge pressure sensor

AL22

CH2 High Press. Error

CH2 abnormal rise in circulating fluid

discharge pressure

AL23

CH2 High Press.

CH2 circulating fluid discharge pressure rise

AL24

CH2 Low Press.

CH2 circulating fluid discharge pressure drop

AL25

CH2 Low Press. Error

CH2 abnormal drop in circulating

fluid discharge pressure

AL26

CH2 Flow Sensor

CH2 failure of circulating fluid discharge

flow sensor

AL27

CH2 High Electric Conductivity

CH2 electric conductivity increase

AL30

Digital Input 1

Contact input 1 signal detection

AL31

Digital Input 2

Contact input 2 signal detection

AL34

Communication

Communication error

AL35

Ambient Temp.

Outside of the ambient temperature range

AL36

Maintenance

Maintenance alarm

AL37

Refrigeration Circuit

Compressor circuit failure

AL38

Sensor

Sensor failure

AL39

Controller

Controller failure

AL40

Compressor Inverter

Compressor inverter error

AL41

Compressor Inverter Comm.

Compressor inverter communication error

AL42

CH1 Pump Inverter

CH1 pump inverter error

AL43

CH1 Pump Inverter Comm.

CH1 pump inverter communication error

AL44

CH2 Pump Inverter

CH2 pump inverter error

AL45

CH2 Pump Inverter Comm.

CH2 pump inverter communication error

Chapter 2 Contact input/output communication /Analog output communication

Table 2.4-4 List of alarm selection

Refer to Operation Manual “Installation ･ Operation”.

HRL Series 2.4 Contact output signal

HRX-OM-W069

2-14

Maintenance No.

Indication

Explanation

MT01

CH1 Pump

CH1 pump maintenance

MT02

Compressor

Compressor maintenance

MT03

Fan

Fan maintenance

MT04

Dustproof Filter

Dust-proof filter maintenance

MT05

DI Filter

CH2 DI filter maintenance

MT06

CH2 Pump

CH2 pump maintenance

MT07

Low Battery

Battery maintenance

MT08

CH1 Pressure Sensor

Maintenance for CH1 circulating fluid
discharge pressure sensor

MT09

CH2 Pressure Sensor

Maintenance for CH2 circulating fluid
discharge pressure sensor

MT10

CH2 Flow Sensor

Maintenance for CH2 circulating fluid
flow sensor

Setting of analog output signal

(1)

(2)

Chapter 2 Contact input/output communication /Analog output communication

Table 2.4-5 List of maintenance reminders

Refer to Operation Manual “Installation ･ Operation”.

2.5 Analog output signal

The product has two analog outputs.

Setting of the analog output signal is done by the "1.4 Touch panel

flow” (Refer to "3. Analog Output Settings" screen).

The following signals can be output as analog signals:

・ Analog output signal 1––“CH1 circulating fluid discharge

temperature”,“CH2 circulating fluid
discharge temperature” or “circulating fluid
electric conductivity”.

・ Analog output signal 2–– “CH1 circulating fluid discharge

temperature”, “CH2 circulating fluid
discharge temperature” or “circulating
fluid electric conductivity”.

2.5 Analog output signal

HRL Series

2-15

No. Indication Item Output

CH1 circulating fluid
discharge temperature

0ºC to 100ºC: 0 to 10.0 V



CH2 circulating fluid
discharge temperature

0ºC to 100ºC: 0 to 10.0 V

CH2 circulating fluid
electrical conductivity

0.1 to 50.0 μS/cm: 0.02 to 10.0 V

CH1 circulating fluid
discharge temperature

0ºC to 100ºC: 0 to 10.0 V

CH2 circulating fluid
discharge temperature

0ºC to 100ºC: 0 to 10.0 V



CH2 circulating fluid
electrical conductivity

0.1 to 50.0 μS/cm: 0.02 to 10.0 V

Setting, selection and display

(1)

Analog output signal 1

(2)

Analog output signal 2

Analog

Output 1

Analog

Output 2

 By default

HRX-OM-W069

Chapter 2 Contact input/output communication /Analog output communication

Table 2.5-1 Setting of analog output signal

HRL Series 2.5 Analog output signal

HRX-OM-W069

2-16

Chapter 2 Contact input/output communication /Analog output communication

2.5 Analog output signal

HRL Series

Chapter 3 Serial communication

3-1

2

SD+

5

SG 7 SD-

SD+

SD-

SG

Terminal

Master

This product

(first slave)

2

SD+

5

SG 7 SD-

This product

(second slave)

2

SD+

5

SG 7 SD-

This product

(31 slaves)

st

resistance

resistance

Terminal

Do not connect any wire to other PIN numbers.

Chapter 3 Serial communication

Serial communication (RS-485/RS232C) enables the remote control of
run/start of the product, temperature setting and details of product
condition, and alarm condition can be obtained.

The operating state of the product (run/stop) and the temperature
setting can be monitored by sending a request message made by the
program of the host computer (e.g. PC).

The communication protocol is MODBUS protocol.

3.1 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 3.2 ‘’Connected explanation’’ In order to avoid malfunction,
do not connect to any place other than those shown in 3.2 ‘’Connected
explanation’’.

HRX-OM-W069

3.2 Connected explanation

Fig.3-1 shows the wiring when RS-485 is selected as the
communication standard. Fig3-2 shows the wiring when RS-232C is
selected.
A communication cable that connects the product and customer
system is not included with the product. Prepare a cable, referring to
Fig.3-1 or Fig 3-2.

Fig 3-1 RS-485 connector connection

HRL Series 3.1 Precautions wiring communication

HRX-OM-W069

3-2

Item

Specification

Connector type (for the product)

D-sub9P type Female connector

Standard

Select from EIA RS-485／RS-232C

Circuit type Half duplex

Half duplex

Transmission type

Start-stop

Protocol

MODBUS terminal1

Terminal resistance

None

2

3

5

RD

SD

SG

2

3

5

RD

SD

SG

Master This product

Do not connect any wire to other PIN numbers.

Chapter 3 Serial communication

[Tips]

・1 master : 1 product, or 1 master: N products.

In the latter case, up to 31 products can be connected.

・Both ends of the communication connection (the end nodes) need to

be connected to the higher level computer.

Fig 3-2 RS-232C connector connection

3.3 Communication specification

Table 3.3-1 Serial communication specification

･ :Default setting

1：Refer to Modicon Co. protocol specifications "PI-MBUS-300 Rev.J".

3.3 Communication specification HRL Series

3-3

Table 3.3-2 Communication specification of MODBUS communication function

Item

Specification

Standard

Select from EIA RS-485／RS-232C

Communication speed

Select from 9600bps／19200bps

Data・bit length

7bit(ASCII) / 8bit(RTU)

Stop・bit length

1bit

Data transfer direction

LSB

Parity

Even parity

Letter code

ASCII character string (ASCII) / Binary data(RTU)

Node type

Slave (Controller)

Slave address set range

Select from 1 to 32 address

Error check

LRC method (ASCII) / CRC method (RTU)

･ :Default setting

3.4 MODBUS communication function

MODBUS protocol is a communication protocol developed by Modicon.
It is used to communicate with a PC or PLC.

Register content is read and written by this communication protocol.

HRX-OM-W069

Chapter 3 Serial communication

This communication has the following features.

・Controls run/stop.
・Sets and reads the circulating fluid set temperature.
・Reads the circulating fluid discharge temperature.
・Reads the circulating fluid discharge pressure.
・Reads the circulating fluid flow rate.
・Reads the circulating fluid electric conductivity(CH2 only).
・Reads the condition of the product.
・Reads the alarm generating condition of the product.
・The operation mode can be switched to "SERIAL" mode.
・You can reset the alarm.

Refer to “3.13 Register Map” for the register of the product.

HRL Series 3.4 MODBUS communication function

HRX-OM-W069

3-4

Chapter 3 Serial communication

3.5 Precautions for communication

3.5.1 Precautions after wiring and before communication

○Check or set the each communication setting by the touch panel.

・The communication specification shall be the customer’s

communication standard.

・The operation mode shall be the SERIAL mode. (When mode

request flagis activated, SERIAL mode is selected. Refer to 3.13.9).

Other modes can perform reading, but only SERIAL mode can perform
writing.

○Check or set the communication parameters using the touch panel.
Check or set the communication speed so that the product ynchronizes

with the host computer (master) prepared by the customer.
○Check the slave address by the touch panel.
No response is returned when a request message is sent from a slave

address other than those set in the product.

3.5.2 Precautions for communicating

○Allow a suitable interval between requests.
To send request messages in series, wait for 100 msec. or longer after

receiving a response message from the product before sending the
next message.

○Retry (resend request message).
The response may not be returned due to noise. If no message is

returned 1sec. after sending a request message, resend the request
message.

○If necessary send a read request message to check if it was written
correctly.

Message to notify the completion of the process is returned when the
action for the written request message is completed.

Send a read request message to confirm if the setting was written as
requested.

○Setting limit of circulating fluid temperature
When the circulating fluid set temperature is written by communication,

the data is stored in FRAM. When the product restarts, it restarts with
the value which was set before the restart. The number of times it is
possible to overwrite FRAM is limited. Data is only stored in FRAM
when it receives a circulating fluid set temperature which is different
from the previous temperatures. Please check how many times it is
possible to overwrite FRAM, and avoid unnecessary changes of the
circulating fluid set temperature during communication

3.5 Precautions for communication HRL Series

3-5

3.6 Setting method

No.

Indication

Item

Setting, selection and display

Default setting

(1)

Protocol

Communication
format

ASCII code

○

Binary data

-

(2)

Type

Standard
EIA RS-485

○

EIA RS-232C

-

(3)

Baud Rate

Communication
speed

9600 bps

-

19200 bps

○

(4)

Slave Address

Slave address

1 to 32

Select from
1 to 32

1

(5)

DIO Run/Stop 1

“Run/stop” by
contact input

Disabled

○

Enabled

-

(6)

Communication

Status

Communication
status 2

0000

Displays the
communication
status

-

Serial communication setting

(1)

(2)

(3)

(4)

(5)

(6)

Set of serial communication is done from “1.4 Touch panel flow”
(Refer to "2. Serial communication settings" screen).

Table 3.6-1 Setting of serial communication

HRX-OM-W069

Chapter 3 Serial communication

1 “Run/stop” operation of the product is carried out by the contact input signal, and by

reading/writing the “change in set value of circulating fluid temperature” and “operation status”
by serial communication.

2 It is a function to display the status of serial communication. Slave address mismatch or register

map of this product display relevant contents for communication nonconformities, such as
accessing outside the area.The table3.6-2 shows the display and its contents.

HRL Series 3.6 Setting method

HRX-OM-W069

3-6

Communication setting

Contents

8001

Normal message

4801

An abnormal number of data has been sent from the customer
device.

4401

This product is trying to access to the outside address of the
register map that support.Or trying to write to read-only address.

4201

Function code that this product does not support is being sent from
the customer's equipment.

0081

The slave addresses set for this product and customer's device are
different.

0041

CRC (1) does not match in the RTU settings.

0021

LRC (1) does not match in the ASCII settings.

00XX(2)

Mismatched communication settings(Baud Rate, parity, number of
data bits, etc.)or very short message intervals from customer
equipment.

0000(3)

Bad wiring or no message sent from customer equipment.

Chapter 3 Serial communication

Table 3.6-2 Communication status

(1) CRC(Refer to 3.10.2)、LRC(Refer to 3.10.1)。
(2) “XX” means that it is undefined.
3) Initial state or after the outgoing message is received from the customer, and displays it in case the

message is a state that can not be received was continued for 30 seconds.

3.6 Setting method HRL Series

3-7

Customer's system

(host)

This product

(slave)

Request message

Positive response

Request message

Negative response

Request message

No response

10 to 200ms

（

Response message

）

（

Response message

）

3.7 Communication sequence

Starts with a request message from the customer’s system (host), and
finishes with a response message from the product (slave). This
product operates as a slave. It does not send any requests.

●Positive response

●Negative response

●No response

HRX-OM-W069

Chapter 3 Serial communication

Based on the request message, reads
register/writes register and returns a
positive response.

Returns a negative message when the
received request message is not
normal.
Refer to ‘’3.12 Negative response’’.

No response is returned when there is

an error in “slave address specification”
or”Checksum(LRC / CRC)”.

3.8 Message configuration

3.8.1 Message frame

The message configuration is shown below. The communication of this

HRL Series 3.7 Communication sequence

product uses 2 transmission modes, ASCII or RTU.

1） ASCII mode frame

For ASCII mode, the message starts with ASCII characters “:”(3Ah)
and ends with “CR/LF”(0Dh,0Ah). A response message will not be

returned unless the request includes [:] and [CR][LF]. This product
clears all previously received code when [:] is received.

HRX-OM-W069

3-8

a)Start

b)Slave

Address

c)Function

d)Data

e) Checksum

(LRC)

f)End

[:]

XX

XX

XX

XX

XX ～ XX

XX

XX

[CR]

[LF]

a)Start

b)Slave

Address

c)Function

d)Data

e) Checksum

(CRC)

f)End

T1-T2-T3-T4

XX

XX

XX ～ XX

XX

XX

T1-T2-T3-T4

Chapter 3 Serial communication

a) Start

b) Slave Address

c) Function (Refer to “3.9 Function codes”)

d) Data

e) LRC

Table 3.8-1 ASCII mode message frame

The start of the message. [:](3Ah) (ASCII)

This is a number to identify this product. “1" is the default setting.
This can be changed by the touch panel.

Command is assigned.

Depending on the function, the address and the number of the
register, the value of reading/writing are assigned.

LRC method
Refer to ‘’3.10.1 LRC(ASCII)’’.

f) END

The end of the message. [CR](0Dh)＋[LF](0Ah)

2) RTU mode frame
RTU mode starts from and ends with at least 3.5 characters of silent interval. Silent
interval is indicated by T1-T2-T3-T4.

Table 3.8-2 RTU mode message frame

a) Start

In Modbus RTU mode, message frames are separated by a silent interval
(non-communication time). At least 3.5 characters of silent interval are necessary
at the beginning and the end of the communication frame.

b) Slave Address

This is a number to identify this product. “1" is the default setting. This can be
changed by the touch panel.

3.8 Message configuration HRL Series

c) Function (Refer to “3.9 Function codes”)

Command is assigned.

3-9

d) Data

NO

Code

Name

Function

1

04(04h)

read holding registers

Reading multiple registers

2

06(06h)

preset single register

Writing registers1

3

16(10h)

preset multiple registers

Writing multiple registers

Depending on the function, the address and the number of the register, the value

of reading/writing are assigned.
e) CRC
CRC method.
Refer to “3.10.2 CRC(RTU)”.
f )End

3.5 characters of silent interval indicates the end of a message.

3.9 Function codes

Table 3.9-1 shows function codes to read or write register. Refer to
"3.11 Explanation of function codes".

HRX-OM-W069

Chapter 3 Serial communication

Table 3.9-1 Function codes

1 : Broadcast is not supported.

3.10 Checksum calculation method

3.10.1 LRC(ASCII)

LRC checks the content of the message other than [:] of START and
[CR][LF] of END. The sending side calculates and sets. The receiving
side calculates based on the received message, and compares the
calculation result with the received LRC. The received message is

deleted if the calculation result and received LRC do not match.
Consecutive 8 bits of the message are added, and the result without
carry (overflow) is converted to 2's complement.

 Calculation example

Example) Change circulating fluid set temperature 23.4 ° C

Sending data 0106004000EA

○Slave Address : No.1
○Function : No.06
○Writing address : 0040h
○Writing data : 00EAh

HRL Series 3.9 Function codes

HRX-OM-W069

3-10

No

Classification

Contents

calculation result

1

LRC message for
calculation

0106004000EA

-

2

Calculation
Added for each 8Byte

01h+06h+00h+40h+00h+EAh=131h

31h

3

complement of 2
31h→CEh→CFh

CFh(LRC)

4

Sending message

[:]0106004000EACF[CR][LF]

-

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

…

Add 0 to the top

If it is 0, do not ExOR

…

1 bit shift in the lowest direction

0 0 0 0 0 0 0

1

0 0 0 0 0 0 0 0 1

…

…

1 bit shift in the lowest direction

Add 0 to the top

Execute ExOR if 1

Chapter 3 Serial communication

3.10.2 CRC(RTU)

CRC checks the content of the message. The sending side calculates
the data every 2 bytes (16 bits). The receiving side calculates CRC
based on the received message, and compares the calculation result
with the received CRC. The received message is deleted if the
calculated CRC is different from the received CRC.

 Calculation procedure

(1) Preload “FFFFh” (set 0xFFFF as initial value ).
(2) Exclusive OR the first byte of the transmitted message with the value in (1).
(3) Shift the result of (2) by one bit toward the least significant bit, and fill a zero

into the most significant bit position.

(4) If the least significant bit was a 1, exclusive OR the result of (3) with “A001h”.

(Example 1). If the least significant bit was a 0, no exclusive OR takes place.
(5) Repeat (3) to (5) until eight shifts have been performed.S
(6) After eight shifts, exclusive OR the result of (5) with the next 1-byte

(2nd. byte).
(7) The processes (3) to (6) are repeated for all the remaining bytes of the

message.
(8) The 2-byte data of the result of (7) is the CRC value

(Example 1) The least significant bit was a 1.

(Example 2) The least significant bit was a 0.

3.10 Checksum calculation method HRL Series

HRX-OM-W069

3-11

Data No.

1st value

2nd value

3rd value

4th value

5th value

6th value

Data
contents

0001h

0006h

0000h

0040h

0000h

00EAh

No

Classification

Contents

Result

1

CRC
message for
calculation

0106000B00FE

-

2

Calculation

Perform (1) to (4) for the 1st value (0001h) and then,
perform (5).

807Eh

3

Perform (6) for 2nd value (0006h) and then, perform (5).

2280h

4

Perform (6) for 3rd. value (0000h) and then, perform (5).

A023h

5

Perform (6) for 4th value (0040h) and then, perform (5).

29E0h

6

Perform (6) for 5th value (0000h) and then, perform (5).

8828Eh

7

Perform (6) for 6th value (00EAh) and then, perform (5).

9109h
(CRC)

8

Addition to the
sent message

0106004000EA09911

-

Chapter 3 Serial communication

 Calculation example

Example) Change circulating fluid set temperature 23.4 ° C

Sending data 0106004000EA

○Slave Address : No.1
○Function : No.06
○Writing address : 0040h
○Writing data : 00EAh

1 When incorporating it into the message, set it in order of low byte and high byte.

HRL Series 3.10 Checksum calculation method

HRX-OM-W069

3-12

Request message 010400300010

Field name

Example

(HEX)

ASCII mode

character data

RTU mode

binary data

Header

-

“:”

None

Slave Address

0x01

“0”,“1”

0x01

Function

0x04

“0”,“4”

0x04

Head address of specified register

0x0030

“0”,“0”,“3”,“0”

0x00,0x30

Quantity of register to read

0x0010

“0”,“0”,“1”,“0”

0x00,0x10

Checksum ASCII:LRC RTU:CRC

-

“B”,”B”

0xF1,0xC9

Trailer

-

CR/LF

None

Total

quantity of byte

17

8

Chapter 3 Serial communication

3.11 Explanation of function codes

3.11.1 Function code：04 Reading multiple registers

Register data of assigned points from assigned address is read.

■ Communication example

○Slave Address : No.1
○Read 16 pieces data from register 0030h.

 CH1 Circulating fluid discharge temperature [20.0℃]
 CH2 Circulating fluid discharge temperature [25.0℃]
 CH2 Circulating fluid electrical conductivity [20.0uS/cm]

 CH1 Circulating fluid discharge pressure [45MPa]
 CH2 Circulating fluid discharge pressure [0.50MPa]
 CH1 Circulating fluid discharge flow rate [45.0LPM]
 CH2 Circulating fluid return flow rate [10.0LPM]
 Data display 1 to 4 [non-selection (all 0)]
 Status flag [during operation, CH1, CH2 TEMP READY status]
 Alarm flag 1 to 3 [no alarm]

3.11 Explanation of function codes HRL Series

HRX-OM-W069

3-13

Response message
01042000C800FA000000C8002D003201C2006400000000000000000031000000000000

Field name

Example

(HEX)

ASCII mode

character data

RTU mode

binary data

Header

-

“:”

None

Slave Address

0x01

“0”,“1”

0x01

Function

0x04

“0”,“4”

0x04

Quantity of bytes to read

0x20

“2”,“0”

0x20

Information of 0030h
(CH1 Circulating fluid discharge temperature)

0x00C8

“0”,“0”,“C”,“8”

0x00,0xC8

Information of 0031h
(CH2 Circulating fluid discharge temperature)

0x00FA

“0”,“0”,“F”,“A”

0x00,0xFA

Information of 0032h (Reservation)

0x0000

“0”,“0”,“0”,“0”

0x00,0x00

Information of 0033h
(CH2 Circulating fluid electrical conductivity)

0x00C8

“0”,“0”,“C”,“8”

0x00,0xC8

Information of 0034h
(CH1 Circulating fluid discharge pressure)

0x002D

“0”,“0”,“2”,“D”

0x00,0x2D

Information of 0035h
(CH2 Circulating fluid discharge pressure)

0x0032

“0”,“0”,“3”,“2”

0x00,0x32

Information of 0036h
(CH1 Circulating fluid flow rate)

0x01C2

“0”,“1”,“C”,“2”

0x01,0xC2

Information of 0037h
(CH2 Circulating fluid flow rate)

0x0064

“0”,“0”,“6”,“4”

0x00,0x64

Information of 0038h (Data display 1)

0x0000

“0”,“0”,“0”,“0”

0x00,0x00

Information of 0039h (Data display 2)

0x0000

“0”,“0”,“0”,“0”

0x00,0x00

Information of 003Ah (Data display 3)

0x0000

“0”,“0”,“0”,“0”

0x00,0x00

Information of 003Bh (Data display 4)

0x0000

“0”,“0”,“0”,“0”

0x00,0x00

Information of 003Ch (Status flag)

0x0031

“0”,“0”,“3”,“1”

0x00,0x31

Information of 003Dh (Alarm flag 1)

0x0000

“0”,“0”,“0”,“0”

0x00,0x00

Information of 003Eh (Alarm flag 2)

0x0000

“0”,“0”,“0”,“0”

0x00,0x00

Information of 003Fh (Alarm flag 3)

0x0000

“0”,“0”,“0”,“0”

0x00,0x00

Checksum ASCII:LRC RTU:CRC

-

“9”,”A”

0xE7,0xB8

Trailer

-

CR/LF

None

Total

quantity of byte

75

37

Chapter 3 Serial communication

HRL Series 3.11 Explanation of function codes

HRX-OM-W069

3-14

Request message 010600420002

Field name

Example

(HEX)

ASCII mode

character data

RTU mode

binary data

Header

-

“:”

None

Slave Address

0x01

“0”,“1”

0x01

Function

0x06

“0”,“6”

0x06

Head address of specified

register

0x0042

“0”,“0”,“4”,“2”

0x00,0x42

Information written to 0042h

(Mode request)

0x0002

“0”,“0”,“0”,“2”

0x00,0x02

Checksum ASCII:LRC RTU:CRC

-

“B”,”5”

0xA8,0x1F

Trailer

-

CR/LF

None

-

Total

quantity of byte

17

8

Response message 010600420002

Field name

Example

(HEX)

ASCII mode

character data

RTU mode

binary data

Header

-

“:”

None

Slave Address

0x01

“0”,“1”

0x01

Function

0x06

“0”,“6”

0x06

Address of register to write

0x0042

“0”, “0”,“4”,“2”

0x00,0x42

Information of register to write

0x0002

“0”,“0”,“0”,“2”

0x00,0x02

Checksum ASCII:LRC RTU:CRC

-

“B”,“5”

0xA8,0x1F

Trailer

-

CR/LF

None

Total

quantity of byte

17

8

Chapter 3 Serial communication

3.11.2 Function code：06 Writing registers

Write data to assigned address.

■Communication example

○Slave Address : No.1
○Write data to register 0042Ch

(The mode request indication)

3.11 Explanation of function codes HRL Series

Chapter 3 Serial communication

3-15

Request message 0110004000030600EB015D0001

Field name

Example

(HEX)

ASCII mode

character data

RTU mode

binary data

Header

-

“:”

None

Slave Address

0x01

“0”,“1”

0x01

Function

0x10

“1”,“0”

0x10

Head address of specified register

0x0040

“0”,“0”,“4”,“0”

0x00,0x40

Quantity of register to write

0x0003

“0”,“0”,“0”,“3”

0x00,0x03

Quantity of byte to read

0x06

“0”,“6”

0x06

Information written to 0040h

(CH1 Circulating fluid set temperature)

0x00EB

“0”,“0”,“E”,“B”

0x00,0xEB

Information written to 0041h

(CH2 Circulating fluid set temperature)

0x015D

“0”,“1”,“5”,“D”

0x01,0x5D

Information written to 0042h

(Operation stop flag)

0x0001

“0”,“0”,“0”,“1”

0x00,0x01

Checksum ASCII:LRC RTU:CRC

-

“5”,”C”

0x91,0xAD

Trailer

-

CR/LF

None

Total

quantity of byte

31

15

Response message 011000400003

Field name

Example

(HEX)

ASCII mode

character data

RTU mode

binary data

Header

-

“:”

None

Slave Address

0x01

“0”,“1”

0x01

Function

0x10

“1”,“0”

0x10

Head address of register to write

0x0040

“0”,“0”,“4”,“0”

0x00,0x40

Quantity of register to write

0x0003

“0”,“0”,“0”,“3”

0x00,0x03

Checksum ASCII:LRC RTU:CRC

-

“A”,”C”

0x81,0xDC

Trailer

-

CR/LF

None

Total

quantity of byte

17

8

3.11.3 Function code：16 Writing multiple registers

Register content of assigned points of assigned address is written.

■ Communication example

○Slave Address : No.1
○Write three consecutive data from register 0040h.

 CH1 Change of circulating fluid set temperature [23.5℃]
 CH2 Change of circulating fluid set temperature [34.9℃]
 Operation start instruction

HRX-OM-W069

HRL Series 3.11 Explanation of function codes

HRX-OM-W069

3-16

Start

Slave

Address

1)Function

2)Error
Code

LRC

End

[:]

XX

XX

XX

XX

XX

XX

XX

XX

[CR]

[LF]

Start

Slave

Address

1)Function

2)Error
Code

CRC

End

T1-T2-T3-T4

1

XX

XX

XX

XX

XX

XX

T1-T2-T3-T4



Chapter 3 Serial communication

3.12 Negative response

A negative response is returned when the following request message
is received.

1) When unspecified function code is used.

2) An address out of range is specified.

3) The data field is not normal.

 Negative response message (Slave to Master)

1) Negative acknowledgment message frame in ASCII mode.

2) Negative acknowledgment message frame in RTU.

1 Silent interval for 3.5 characters

1) Function
Assign the value consisting of the request function code (hexadecimal

value) plus 80h.

Example 1) ASCII mode

Received function code: “04”(0000 0100)” ASCII code 30h, 34h
Abnormal function code: ”84”（1000 0100）” ASCII code 38h, 34h

Example 2) RTU mode

Receive function code: "04" (0000 0100)
Abnormal function code: "84" (1000 0100）

2) Error Code
Assign error code below.

3.12 Negative response HRL Series

01 : Function code of a command is outside the standard
02 : The specified address of register is outside the range.
03 : Data field of a command is not normal.

HRX-OM-W069

3-17

Request message 010401000007

Field name

Example

(HEX)

ASCII mode

character data

RTU mode

binary data

Header

-

“:”

None

Slave Address

0x01

“0”,“1”

0x01

Function

0x04

“0”,“4”

0x04

Head address of register out of range

0x0100

“0”,“1”,“0”,“0”

0x01,0x00

Quantity of register to read

0x0007

“0”,“0”,“0”,“7”

0x00,0x07

Checksum ASCII:LRC RTU:CRC

-

“F”,”3”

0xB0,0x34

Trailer

-

CR/LF

None

Total

quantity of byte

16

8

Response message 018402

Field name

Example

(HEX)

ASCII mode

character data

RTU mode

binary data

Header

-

“:”

None

Slave Address

0x01

“0”,“1”

0x01

Function (03h+80h)

0x84

“8”,“4”

0x84

Error Code

(Specified register address is out of range.)

0x02

“0”,“2”

0x02

Checksum ASCII:LRC RTU:CRC

-

“7”,“9”

0xC2,0xC1

Trailer

-

CR/LF

None

Total

quantity of byte

11

5

Chapter 3 Serial communication

■ Communication example

○Slave Address : No 1

○Read seven consecutive data from register 0100h which is out of range.

HRL Series 3.12 Negative response

HRX-OM-W069

3-18

Address

Contents

value

R/W

0030h

CH1 Circulating fluid
discharge temperature

Decimal number : -327.6 to 327.6℃
Hexadecimal number : F334h to 0CCCh
(0.1℃/dig)

R

0031h

CH2 Circulating fluid
discharge temperature

Decimal number : -327.6 to 327.6℃
Hexadecimal number : F334h to 0CCCh
(0.1℃/dig)

0032h

Reservation

－

0033h

CH2 Circulating fluid
electrical conductivity

Decimal number : –3276.8 to 3276.7µS/cm
Hexadecimal number : 8000h to 7FFFh
(0.1µS/cm/dig)

0034h

CH1 Circulating fluid
discharge pressure

Decimal number : -32.76 to 32.76MPa
Hexadecimal number : F334h to 0CCCh
(0.01MPa/dig)

0035h

CH2 Circulating fluid
discharge pressure

Decimal number : -32.76 to 32.76MPa
Hexadecimal number : F334h to 0CCCh
(0.01MPa/dig)

0036h

CH1 Circulating fluid

flow rate

Decimal number : -3276.8 to 3276.7LPM
Hexadecimal number : 8000h to 7FFFh]
(0.1LPM/dig)

0037h

CH2 Circulating fluid

flow rate

Decimal number : -3276.8 to 3276.7LPM
Hexadecimal number : 8000h to 7FFFh
(0.1LPM/dig)

0038h

Data display 1

Follow the data instructions1

0039h

Data display 2

Follow the data instructions1

003Ah

Data display 3

Follow the data instructions1

003Bh

Data display 4

Follow the data instructions1

003Ch

Status flag

Refer to 3.13.5 Status flag

003Dh

Alarm flag 1

Refer to 3.13.6 Alarm flag

003Eh

Alarm flag 2

Refer to 3.13.6 Alarm flag

003Fh

Alarm flag 3

Refer to 3.13.6 Alarm flag

0040h

CH1 Circulating fluid
set temperature

Positive number : 0000h to 7FFFh(0.1℃/dig)
Negative number : 8000h to
FFFFh(0.1℃/dig)2

R/W

0041h

CH2 Circulating fluid
set temperature

Positive number : 0000h to 7FFFh(0.1℃/dig)
Negative number : 8000h to
FFFFh(0.1℃/dig)2

0042h

Operation instruction

3(Operation start instruction, mode request,
alarm reset)

0043h

Data instruction

4

Chapter 3 Serial communication

3.13 Register Map

 1 Data display(Refer to 3.13.7 Data display)
 2 Negative numbers are two's complement representation
 3 Operation instruction(Refer to 3.13.9 Operation instruction)

4 Data instruction(Refer to 3.13.10 Data instruction)

3.13 Register Map HRL Series

3-19

3.13.1 Circulating fluid discharge temperature

To notify the circulating fluid discharge temperature of the product. (°C
or °F). Read the circulating fluid discharge temperature which is
displayed on the touch panel. (Offset temperature is displayed if offset
function is set).

3.13.2 Circulating fluid electrical conductivity

Notifies the circulating fluid electrical conductivity(CH2 only).

3.13.3 Circulating fluid discharge pressur

To notify the circulating fluid discharge pressure of the product.

3.13.4 Circulating fluid flow rate

To notify the circulating fluid discharge pressure of the product..

HRX-OM-W069

Chapter 3 Serial communication

HRL Series 3.13 Register Map

HRX-OM-W069

3-20

Name

Status flag

Bit

15

14

13

12

11

10 9 8 7 6 5 4 3 2 1 0

Bit

Name

Explanation

0

Run flag

Run status
0= Stop 1= Run

1

Operation stop alarm flag

Operation stop alarm given off status
0= Not occurred
1= Operation stop alarm given off

2

Operation continued alarm flag

Operation continued alarm given off status
0= Not occurred
1= Operation continued alarm given off

3

Notice for maintenance

Notice for maintenance status
0 = Not generated 1 = Generated

4

CH1 Completion of preparation

(TEMP READY)flag

Completion of preparation (TEMP READY) status
0= Condition isn’t formed 1= Condition is formed

5

CH1 Completion of preparation

(TEMP READY)flag

Completion of preparation (TEMP READY) status
0= Condition isn’t formed 1= Condition is formed

6

TEMP OUT flag

TEMP OUT status
0= Condition isn’t formed 1= Condition is formed

7

None

－

8

None

－

9

None

－

10

None

－

11

None

－

12

External tuning function flag

External tuning function setting states
0=Stop 1= During setting

13

Warm-up function flag

Warm-up function setting status
0= Unset 1= During setting

14

Startup operation flag

Startup operation setting status
0= Unset 1= During setting

15

Anti-freezing flag

Anti-freezing setting status
0= Unset 1= During setting

Chapter 3 Serial communication

3.13.5 Status flag

The status of the product is read by the following assignment.

Status flag

3.13 Register Map HRL Series

3-21

3.13.6 Alarm flag

Name

Alarm flag 1

Bit

15

14

13

12

11

10 9 8 7 6 5 4 3 2 1 0 Name

Alarm flag 2

Bit

15

14

13

12

11

10 9 8 7 6 5 4 3 2 1 0

Bit

Name

Explanation

Alarm flag 1

0

CH1 abnormal low tank fluid level

Alarm given off status
0= Not occurred
1= Occurred

1

CH1 low tank fluid level

2

CH2 Abnormal low tank fluid level

3

CH2 low tank fluid level

4

Reservation

5

Fan failure

6

Reservation

7

Reservation

8

CH1 abnormal rise of circulating fluid temperature

9

CH1 circulating fluid temperature rise

10

CH1 circulating fluid temperature drop

11

CH1 TEMP READY alarm

12

CH2 abnormal rise of circulating fluid temperature

13

CH2 circulating fluid temperature rise

14

CH2 circulating fluid temperature drop

15

CH2 TEMP READY alarm

Alarm flag 2

0

CH1 abnormal rise in heat exchanger inlet temperature

1

CH1 failure of circulating fluid discharge pressure sensor

2

CH1 circulating fluid discharge pressure rise

3

CH1 circulating fluid discharge pressure drop

4

CH2 abnormal rise in heat exchanger inlet temperature

5

CH2 failure of circulating fluid discharge pressure sensor

6

CH2 circulating fluid discharge pressure rise

7

CH2 circulating fluid discharge pressure drop

8

CH2 abnormal drop in circulating fluid discharge pressure

9

CH2 failure of circulating fluid discharge flow sensor

10

CH2 electric conductivity increase

11

Reservation

12

Reservation

13

Contact input signal 1 detection

14

Contact input signal 2 detection

15

Reservation

HRX-OM-W069

Chapter 3 Serial communication

Each type of alarm which occurs in the product is read with the
following assignment.

HRL Series 3.13 Register Map

HRX-OM-W069

3-22

Alarm flag 3

0

Reservation

Alarm given off status
0= Not occurred
1= Occurred

1

Communication error

2

Outside of the ambient temperature range

3

Maintenance alarm

4

Compressor circuit failure

5

Sensor failure

6

Controller failure

7

Compressor inverter error

8

Compressor inverter communication error

9

CH1 pump inverter error

10

CH1 pump inverter communication error

11

CH2 pump inverter error

12

CH2 pump inverter communication error

13

Reservation

14

Reservation

15

Reservation

No.

Item

Range

0

None

0

1

Ambient temperature

Decimal number : -327.6 to 327.6℃
Hexadecimal number : F334h to 0CCCh
(0.1℃/dig

2

External tuning temperature 

Decimal number : -327.6 to 327.6℃
Hexadecimal number : F334h to 0CCC
(0.1℃/dig)

3

CH1 heat exchanger inlet temperature

Decimal number : -327.6 to 327.6℃
Hexadecimal number : F334h to 0CCCh
(0.1℃/dig)

4

Notice for maintenance

Occurrence status of each maintenance
0= Not occurred 1= Occurred

5

Pressure of high pressure refrigerant circuit

Decimal number : -32.76 to 32.76MPa
Hexadecimal number : F334h to 0CCCh
(0.01MPa/dig)

Chapter 3 Serial communication

3.13.7 Data display

The contents selected in the data instruction will be displayed on the
data display 1 to 4.Table below shows the data type which can be
displayed and the range.

 When the external tuning function is OFF, it will be -327.6 ℃ (F334h) fixed.

3.13.8 Circulating fluid set temperature

In SERIAL mode, you can set the circulating fluid set temperature of
this product by specifying the circulating fluid set temperature.
If the temperature exceeds the upper limit of the circulating fluid set
temperature range, the circulating fluid set temperature is changed to
the upper limit value. If it is lower than the lower limit, the circulating

3.13 Register Map HRL Series

fluid set temperature is changed to the lower limit value.

3-23

3.13.9 Operation instruction

Name

Operation instruction

Bit

15

14

13

12

11

10 9 8 7 6 5 4 3 2 1 0

Bit

Name

Explanation

0

Operation Start Command

Operation Start /Stop
0= Operation Stop 1= Operation Start

1

Mode request flag

Mode request
0= None 1= Yes

2

Alarm reset flag

Alarm reset
0= None 1= Yes

3 to15

None

-

Operation Start Command

SERIAL mode, you can control the operation start / stop of this product. However,
this function is invalidated when the setting of "DIO Run / Stop" is ON on the touch
panel.

Mode request flag

HRX-OM-W069

Chapter 3 Serial communication

The mode request flag can be switched to the SERIAL mode is changed from 0 to 1.
After that, even if it changes to 0, it keeps SERIAL mode.

(For details, Refer to “1.2 Change of operation mode”)

Alarm reset flag

Alarm reset can be performed by changing the alarm reset flag from 0 to 1 in
SERIAL mode.

3.13.10 Data instruction

By setting the data instructions to display the data that you selected in
each data display 1, 2, 3, 4.
The types of data that can be displayed are shown below.
Data display 1 displays data of the type instructed in data instruction 1
(data instruction 0-3 bits), data display 2 data instruction 2 (data
instruction high 5-7 bits), data display 3 data instruction 3 (data
instruction high Data display 4 displays data of the type specified in
data indication 4 (upper 12-15 bits of data indication).

HRL Series 3.13 Register Map

HRX-OM-W069

3-24

Name

Data instruction 4

Data instruction 3

Data instruction 2

Data instruction 1

Bit

15

14

13

12

11

10 9 8 7 6 5 4 3 2 1 0

Numeric value

Description

Data instruction 1

0

None

1

Ambient temperature

2

External tuning temperature

3

CH1 heat exchanger inlet temperature

4

Notice for maintenance

5

Pressure of high pressure refrigerant circuit

Data instruction 2

0

None

1

Ambient temperature

2

External tuning temperature

3

CH1 heat exchanger inlet temperature

4

Notice for maintenance

5

Pressure of high pressure refrigerant circuit

Data instruction 3

0

None

1

Ambient temperature

2

External tuning temperature

3

CH1 heat exchanger inlet temperature

4

Notice for maintenance

5

Pressure of high pressure refrigerant circuit

Data instruction 4

0

None

1

Ambient temperature

2

External tuning temperature

3

CH1 heat exchanger inlet temperature

4

Notice for maintenance

5

Pressure of high pressure refrigerant circuit

Chapter 3 Serial communication

3.13 Register Map HRL Series

Chapter 3 Serial communication

3-25

Request message 010600430001

Field name

Example

(HEX)

ASCII mode

character data

RTU mode

binary data

Header

-

“:”

None

Slave Address

0x01

“0”,“1”

0x01

Function

0x06

“0”,“6”

0x06

Address of the specified register

0x0043

“0”,“0”,“4”,“3”

0x00,0x43

Information written to 0043h

(Data instruction)

0x0001

“0”,“0”,“0”,“1”

0x00,0x01

Checksum ASCII:LRC RTU:CRC

-

“B”,”5”

0xB9,0xDE

Trailer

-

CR/LF

None

-

Total

quantity of byte

17

8

Response message 010600430001

Field name

Example

(HEX)

ASCII mode

character data

RTU mode

binary data

Header

-

“:”

None

Slave Address

0x01

“0”,“1”

0x01

Function

0x06

“0”,“6”

0x06

Address of register to write

0x0043

“0”,“0”,”4”,”3”

0x00,0x43

Information of register to write

0x0001

“0”,“0”,“0”,“1”

0x00,0x01

Checksum ASCII:LRC RTU:CRC

-

“B”,“5”

0xB9,0xDE

Trailer

-

CR/LF

None

-

Total

quantity of byte

17

8

■ Communication example

○When reading the ambient temperature to the data display 1

○Slave Address : No.1
○Function code 6 : Write one data to 0043 h

(Set ambient temperature to data instruction 1.)

HRX-OM-W069

HRL Series 3.13 Register Map

HRX-OM-W069

3-26

Request message 010400380001

Field name

Example

(HEX)

ASCII mode

character data

RTU mode

binary data

Header

-

“:”

None

Slave Address

0x01

“0”,“1”

0x01

Function

0x04

“0”,“4”

0x04

Head address of specified register

0x0038

“0”,“0”,“3”,“8”

0x00,0x38

Quantity of register to read

0x0001

“0”,“0”,“0”,“1”

0x00,0x01

Checksum ASCII:LRC RTU:CRC

-

“C”,”2”

0xB0,0x07

Trailer

-

CR/LF

None

Total

quantity of byte

17

8

Response 01040200FA

Field name

Example

(HEX)

ASCII mode

character data

RTU mode

binary data

Header

-

“:”

None

Slave Address

0x01

“0”,“1”

0x01

Function

0x04

“0”,“4”

0x04

Quantity of bytes to read

0x02

“0”,“2”

0x02

Information of 0038h (Data display 1)

0x00FA

“0”,“0”,“F”,“A”

0x00,0xFA

Checksum ASCII:LRC RTU:CRC

-

“F”,”F”

0x39,0x73

Trailer

-

CR/LF

None

Total

quantity of byte

15

7

Chapter 3 Serial communication

● Function code 4 : Read one data of 0038 h
(Read out the ambient temperature of data display 1.)

Response message at an ambient temperature of 25.0℃

3.13 Register Map HRL Series

Chapter 4 Communication alarm function

4-1

This product

Your system

Write or read

Write or read

60 sec.

60 sec.

60 sec.

60 sec.

Broken

wire

o r

coming

off

Passage of

180 sec.

Excess at no

monitoring time.

AL34 Communication

alarm is generated.

Operation continues

Monitoring

time

Monitoring

time

communication

Chapter 4 Communication alarm

function

Monitors whether the serial communication is sent/received properly
between the product and the customer’s device. This feature is only
valid when the operation mode is set to SERIAL mode.

Abnormal signals or disconnection of the communication cable can be
notified immediately by setting the alarm function to match the interval
at which messages are sent from the customer device. When the
communication is restored, the alarm is automatically reset.

Do not use this function when the customer device does not send
messages regularly.

4.1 Communication alarm occurs

Fig 4-1 shows when an alarm occurs. Refer to 4.3 for the setting
method.

HRX-OM-W069

●Communication alarm
Operation continues when an alarm occurs.

●Time for monitoring the communication alarm
180 sec

When the customer's device is sending messages every 60sec, if the
communication cable is disconnected and no message is received for
180sec, the product generates AL34 communication error alarm to
notify the error.

Fig. 4-1 Communication alarm example

HRL Series 4.1 Communication alarm occurs

HRX-OM-W069

4-2

This product

Your system

Write or read

Write or read

60 sec.

60 sec.

60 sec.

Broken

wire

o r

coming

off

AL34 Communication

alarm is generated.

Monitoring

time

Monitoring

time

Normal

connection

Communication alarm

automatic restoration

Write or read

60 sec.

：

：

Indication

Item

Setting and selection

Setting range

Comm.

Error

Alarm “AL34 :
Communication
error”

Disabled

Communication
alarm detection
time 1

30 to 600sec
30sec



Operation
continues during
the alarm

Operation stops
during alarm

Setting item

Chapter 4 Communication alarm function

4.2 Communication alarm reset

When AL34 communication error has been generated, the alarm is
automatically reset when the disconnection of the communication
cable is fixed, and the message from the customer is received. If
operation is set to stop when a communication alarm occurs, restart
the operation if necessary.

Fig. 4-2 Communication alarm restoration example

4.3 Setting method

Set of serial communication is done from “1.4 Touch panel flow”
(Refer to "2. Serial communication settings" screen).

By default
1 : Time from communication error to alarm occurrence (monitoring time)

4.2 Communication alarm reset HRL Series

Revision

1st edition:May 2019

4-14-1, Sotokanda, Chiyoda-ku, Tokyo 101-0021 JAPAN
Tel: + 81 3 5207 8249 Fax: [phone]
URL http://www.smcworld.com

Note: Specifications are subject to change without prior notice and any obligation on the part of the manufacturer.
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