SMC Networks HRS400-A-46 User manual

DOC1003626
Operation Manual
Communication function
Thermo-chiller
Air-Cooled refrigerated type
HRS400-A  -46- 
Keep this manual available whenever necessary
© 2022 SMC Corporation All Rights Reserved

To 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 do not constitute a contract, and will not affect any existing
agreements or commitments.
● It is strictly prohibited to copythis manual entirely or partially for the use by the third partywithout
prior permission from SMC.
Note: This manual is subject to possible change without prior notice.

DOC1003626
Contents
HRS400-A-46
Contents
Read before using ............................................................1-1
1.1 Operation mode and operation method................................................................. 1-2
1.2 Change of operation mode ..................................................................................... 1-3
1.3 Communication port ............................................................................................... 1-5
1.4 Touch panel flow ..................................................................................................... 1-6
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
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
3.8Message configuration ........................................................................................... 3-7
3.8.1 Message frame ....................................................................................................................3-7
3.9 Function code.......................................................................................................... 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....................................................................................3-13
3.11.3 Function code: 16 Writing multiple registers ......................................................................3-15
3.12 Negative response ................................................................................................ 3-16
3.13 Register map ......................................................................................................... 3-18

DOC1003626
Contents
HRS400-A-46
3.13.1 Circulating fluid discharge temperature.............................................................................3-19
3.13.2 Circulating fluid flow rate ...................................................................................................3-19
3.13.3 Circulating fluid discharge pressure ..................................................................................3-19
3.13.4 Circulating fluid electrical conductivity...............................................................................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
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

DOC1003626
Chapter 1 Read before using
HRS400-A-46 1.1 Operation mode and operation method
1-1
Read before using
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
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.
●If using contact input/output communication, refer to chapter 2.
●If using serial communication Modbus, refer to chapter 3.

DOC1003626
Chapter 1 Read before using
1.1 Operation mode and operation method HRS400-A-46
1-2
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
Table 1.1-1 Operation modes.
Operation
mode
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)".
・Displays the current operation mode.
・You can change the operation mode
by pressing it.

DOC1003626
Chapter 1 Read before using
HRS400-A-46 1.2 Change of operation mode
1-3
Table 1.1-2 Operation mode and operation
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
communication
Run/Stop
×
○
×
○
Contact output
communication
Condition reading
○
○
○
○
Reading of the external switch
○
○*1
○
○*1
Serial communication
Run/Stop
×
×
○
×
Serial communication
Circulating fluid
temperature setting
×
×
○
○
Serial communication
Condition reading
○
○
○
○
*1 When Contact input 1 is set to Run / Stop, one external switch can be connected.
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, serial
communication, the mode request becomes effective and the operation
mode changes.
Table 1.2-1 Operation mode change by mode request
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
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.
○Applica
ble
×Not
applicable

DOC1003626
Chapter 1 Read before using
1.2 Change of operation mode HRS400-A-46
1-4
Fig. 1-1 Mode switching by the mode request (Standard)
Fig.1-2 Mode switching by the mode request (ON state mixed)
SERIAL
LOCAL
Select the LOCAL in the touch panel
Contact input 3
Mode request signal
Serial communication
Mode request flag
Operation mode
LOCAL
DIO
Contact input 3
Mode request signal
Serial communication
Mode request flag
Operation mode
LOCAL
DIO
SERIAL
DIO
SERIAL

DOC1003626
Chapter 1 Read before using
HRS400-A-46 1.3 Communication port
1-5
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
Serial communication
connector
D sub 9 female pin
(socket) type
6
9
1
5
Contact input / output
signal connector
D sub 25 female pin
(socket) type
14
25
1
13

DOC1003626
Chapter 1 Read before using
1.4 Touch panel flow HRS400-A-46
1-6
1.4 Touch panel flow
Press the [Comm. Setting] on the menu, make the communication
settings from the various setting screens.
Fig.1-4 Communication setting touch panel flow

DOC1003626
Chapter 2 Contact input/output communication / Analog output communication
HRS400-A-46 2.1 Precautions for communication
2-1
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
Signal
Signal content
Contact input
3pcs.
Contact input 1
・Operation / stop signal, Allowed input an external switch signal
・Selectable signal configuration (Alternate/Momentary)
・Selectable contact type (normally open / normally closed)
Contact input 2
Contact input 3
Mode request signal only (momentary)
Contact output
3pcs.
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
・Selectable signal content(Refer to “2.4 Contact output signal)
・Selectable contact type (normally open / normally closed)
Contact output 5
Contact output 6
Analog output
2pcs.
Analog output 1
Selectable from the following
・Circulating fluid discharge temperature
・Circulating fluid electric conductivity *2
Analog output 2
*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 For option D “With electrical conductivity control”, you can select it.
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 “2.2 Communication
specification”. In order to avoid malfunction, do not connect to any place other than
those shown in “2.2 Communication specification”.
○Power supply
To use the power of the product, the total load current must be 200mA or less.

DOC1003626
Chapter 2 Contact input/output communication / Analog output communication
2.2 Communication specification HRS400-A-46
2-2
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
Connector specification (this product side)
Dsub 25 pin female (socket) type
Table 2.2-2 Contact input/output/ analog output communication specification
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
・Circulating fluid
discharge temperature
・Circulating fluid
electric conductivity 3
Maximum output
current
10mA
Maximum accuracy
±0.4%F.S. or less
DC24V output voltage
DC24V±10% 200mA MAX 1
(It can not be used for inductive load.)
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”.
3 For option D “With electrical conductivity control”, it can be set.

DOC1003626
Chapter 2 Contact input/output communication / Analog output communication
HRS400-A-46 2.2 Communication specification
2-3
表 2.2-3 接点入出力/アナログ出力ピン番号
PIN
No.
Item
Division
Factory default
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 *3
10
Analog output signal 2
Output
Circulating fluid discharge
temperature signal *4
11
Analog output signal 1
Output
Circulating fluid discharge
temperature signal *4
12
None
－
Can not connect *3
13
None
－
Can not connect *3
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 *3
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 *3
22
Common of contact
output signal 2
Output
－
23
Common of contact
output signal 1
Output
－
24
None
－
Can not connect *3
25
None
－
Can not connect *3
*1 It is possible to change the setting.
*2 You can not change the setting(“N.O type / N.C. type” can be changed).
*3 Do not wire.
*4 For option D “With electrical conductivity control”, it is possible to change the setting.

DOC1003626
Chapter 2 Contact input/output communication / Analog output communication
2.2 Communication specification HRS400-A-46
2-4
Fig.2-2 Circuit diagram
Analog output 1 : 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
[When Warning alarm occurr OFF]
[When Fault alarm occurr OFF]
［Operation ON]
Contact output 6 : OFF
2
DC24V
DC +24V(input)EXT DC24V
EXT 24COM
Power
supply
Analog output 2 : Circulating fluid discharge temperature
External switch
24COM(output)
Contact output common
Contact output common
Analog output 1 common
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
2Power
supply
DC24V
24COM
4
3
4
This product power supply
usage example
Customer power supply usage example
Power supply usage example

DOC1003626
Chapter 2 Contact input/output communication / Analog output communication
HRS400-A-46 2.3 Contact input signal
2-5
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. Setting for contact input signal 1 to 3" 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
Setting for contact input signal 1 to 3
①
②
③

DOC1003626
Chapter 2 Contact input/output communication / Analog output communication
2.3 Contact input signal HRS400-A-46
2-6
Table 2.3-1 Setting of contact input signal form
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
[Stop] *2
Stop signal
(3)
Input 3
Contact input
signal 3 *3
Contact
type
*1
A contact (normally open)
B contact
(normally closed)
*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”.

DOC1003626
Chapter 2 Contact input/output communication / Analog output communication
HRS400-A-46 2.3 Contact input signal
2-7
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.
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

DOC1003626
Chapter 2 Contact input/output communication / Analog output communication
2.3 Contact input signal HRS400-A-46
2-8
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 [AL 31: 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
“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

DOC1003626
Chapter 2 Contact input/output communication / Analog output communication
HRS400-A-46 2.3 Contact input signal
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.
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
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).
“Delay” time and “off detect” time
(1)
(2)
(3)
Communication error, detection alarm
of contact input signal and setting

DOC1003626
Chapter 2 Contact input/output communication / Analog output communication
2.4 Contact output signal HRS400-A-46
2-10
Table 2.3-3 Communication error, detection of contact input signal and operation setting
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 to 10sec
*0sec
*
Operation stops
during alarm
* By default
2.4 Contact output signal
There are 6 contact output signals. Setting of the contact output
signal is done by the “1.4 Touch panel flow” (Refer to "5. Setting for
contact output signal 1 to 3" screen and "6. Setting for contact output
signal 4 to 6" 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.
Setting of contact output signal 1 to 3
(1)
(2)
(3)