SMC Networks Thermo-con INR-244-831 User manual

PRODUCT NAME
Air cooled Thermo-con (Compact type)
MODEL / Series / Product Number
INR-244-831
Serial Communication
Manual
HEC-OM-Y010
Keep available whenever necessary.
This manual is copyrighted and all rights are reserved by SMC
Corporation, and may not, in whole or in part, be copied,
photocopied or translated without prior written consent of SMC.

History
INR-244-831 i
History
Version
Preface
Contents
Chap.1
Chap.2
Chap.3
Chap.4
1.0
Feb/19/21
Feb/19/21
Feb/19/21
Feb/19/21
Feb/19/21
Feb/19/21
Record of Changes
Version
Contents
Date
1.0
First edition
Feb/19/21

Preface
ii INR-244-831
Preface
Thank you very much for purchasing SMC Thermo-con.
This manual contains description for communication protocol of this product for your full benefit from this
product.
Read the operation manual carefully before use of this product, and understand the outline of the
product and safety instructions well. Instructions in the categories, “Danger”, “Warning”and “Caution”,
are important for safety and must be duly followed.
Please contact the following for any question and unclear points regarding the Thermo-con.
SMC Corporation R&D Center
Product Development Division-6
Address: 4-2-2, KINUNODAI,TSUKUBAMIRAI-CITY , IBARAKI-KEN 300-2493, JAPAN
Phone:[phone]
Fax:[phone]
E-mail:[e-mail]
Notice: The content of this manual can be revised without a previous notice.

Contents
INR-244-831 iii
Contents
1PREPARATION FOR COMMUNICATION ---------------------------------------- 1-1
2OPTIONS OF COMMUNICATION METHOD------------------------------------- 2-1
2.1 COMMUNICATION PROCEDURE -------------------------------------------------------------------------- 2-1
3COMMUNICATION FORMAT -------------------------------------------------------- 3-1
3.1 TYPE OF MESSAGE ---------------------------------------------------------------------------------------- 3-1
3.2 CONTENT OF COMMUNICATION -------------------------------------------------------------------------- 3-1
3.3COMPOSITION OF REQUIRED MESSAGE (FROM MASTER TO THE PRODUCT) --------------------- 3-2
3.4 COMPOSITION OF RESPONSE MESSAGE (FROM THE PRODUCT TO MASTER) -------------------- 3-3
3.5 EXPLANATION OF CODE----------------------------------------------------------------------------------- 3-4
3.6 CAUTIONS FOR COMMUNICATION ----------------------------------------------------------------------- 3-6
3.7 COMMUNICATION EXAMPLE ------------------------------------------------------------------------------ 3-7
3.8 CONNECTION ----------------------------------------------------------------------------------------------- 3-9
3.9 IDENTIFICATION CODE LIST ------------------------------------------------------------------------------ 3-9
3.10 ASCII CODE LIST --------------------------------------------------------------------------------------- 3-9
4TROUBLESHOOTING------------------------------------------------------------------ 4-1

Preparation for Communication
INR-244-831 1-1
1 Preparation for Communication
Make preparation for using communication facility as follows.
1) Turn off the power switch of Thermo-con. (Detach the communication connector when the power
switch of the thermo-con is turning off.)
2) Connect communication cable to communication connector of Thermo-con.
･Use twist pair shield cable as communication cable.
･Connect the host and thermo-con with the straight cable for RS-485.
･Connect shielded cable of communication cable to communication connector and drop it to FG(flame
ground).
･Connection drawing for communication is shown in the Figures 1-1.
･Length of communication cable for RS-485 shall be limited to around 500[m] in total
･If communication cable for RS-485 is longer, connect terminating resistance (220Ω,1/2w) to each +
and - terminal of the host computer and the farthest Thermo-con.
3) Turn on the power switch of Thermo-con.
4) Set the communication method (page 2-1) for all Thermo-con connected. (Refer the operation
manual (HEC-OM-Y008) how to set the communication method parameters.)
5) That’s all for preparation of communication. Then if a communication command from the host
computer is given, each Thermo-con will respond.
Figure1-1 Communication Connection

Specifications of Communication Method
INR-244-831 2-1
2 Options of Communication Method
Standards･････････････････････････････････････
Circuit type･･･････････････････････････････････
Communication type･･･････････････････････････
Communication speed･･････････････････････････
Character code････････････････････････････････
Parity･････････････････････････････････････････
Start bit･･････････････････････････････････････
Data length･･･････････････････････････････････
Stop bit･･･････････････････････････････････････
BCC check･･･････････････････････････････････
Address･･･････････････････････････････････････
RS-485
Half duplex
Asynchronous
2400,4800,9600,19200, 38400 bps
ASCII
None, even number, odd number
1 bit
7 bit or 8 bit.
1 bit or 2 bit.
Disable, Enable
1 to 99
Note: Values underlined indicate default values.
It is set to these values when delivered.
2.1 Communication Procedure
This product receives a “request message”from the master computer and sends
back a corresponding “response message”. It does not send a message firstly.
Response delay time setting Required interval
Time required for sending/receiving
Master
This product
From
master
0 to 250ms
1ms or more
Request
message
Response
message
From the
product
From
master
From the
product
Response
message
Request
message