SMC Networks Thermo-con INR-244-831 Manual
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SMC Networks Thermo-con INR-244-831 Manual

Air cooled (compact type)
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HEC-OM-Y010
Serial Communication
Manual
PRODUCT NAME
Air cooled Thermo-con (Compact type)
MODEL / Series / Product Number
INR-244-831
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.

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Summary of Contents for SMC Networks Thermo-con INR-244-831

  • Page 1 HEC-OM-Y010 Serial Communication Manual PRODUCT NAME Air cooled Thermo-con (Compact type) MODEL / Series / Product Number INR-244-831 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.
  • Page 3 History History Version Preface Contents Chap.1 Chap.2 Chap.3 Chap.4 Feb/19/21 Feb/19/21 Feb/19/21 Feb/19/21 Feb/19/21 Feb/19/21 Record of Changes Version Contents Date First edition Feb/19/21 INR-244-831...
  • Page 4 Preface 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.

  • Page 5: Table Of Contents

    Contents Contents 1 PREPARATION FOR COMMUNICATION ---------------------------------------- 1-1 2 OPTIONS OF COMMUNICATION METHOD ------------------------------------- 2-1 -------------------------------------------------------------------------- 2-1 OMMUNICATION ROCEDURE 3 COMMUNICATION FORMAT -------------------------------------------------------- 3-1 ---------------------------------------------------------------------------------------- 3-1 YPE OF ESSAGE -------------------------------------------------------------------------- 3-1 ONTENT OF OMMUNICATION ) --------------------- 3-2 OMPOSITION OF EQUIRED ESSAGE FROM MASTER TO THE PRODUCT ) -------------------- 3-3...

  • Page 7: Preparation For Communication

    Preparation for Communication 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.

  • Page 9: Options Of Communication Method

    Specifications of Communication Method Options of Communication Method Standards･････････････････････････････････････ RS-485 Circuit type･･･････････････････････････････････ Half duplex Communication type･･･････････････････････････ Asynchronous Communication speed･･････････････････････････ 2400,4800,9600,19200, 38400 bps Character code････････････････････････････････ ASCII Parity･････････････････････････････････････････ None, even number, odd number Start bit･･････････････････････････････････････ 1 bit Data length･･･････････････････････････････････ 7 bit or 8 bit. Stop bit･･･････････････････････････････････････...

  • Page 11: Communication Format

    Communication Format Communication Format Type of Message The type of message can essentially be divided into the following categories. Request Response message message (From master) (From this product) Receipt check and data sending Request to read Notice of writing completion Request to write Notice of receiving error and its contents Request to store...

  • Page 12: Composition Of Required Message (From Master To The Product)

    Communication Format Composition of Required Message (from master to the product) Refer to page 3-4 “3.5 Explanation of Code” for codes 1 to 10.  Composition of request message to read Ｓ Ｅ Ｂ Ｔ □ □ Ｒ □ □ □ Ｔ...

  • Page 13: Composition Of Response Message (From The Product To Master)

    Communication Format Composition of Response Message (from the product to master) Refer to page 3-4 “3.5 Explanation of Code” for codes 1 to 10.  Response message to request message to read Ｓ Ａ Ｅ Ｂ Ｔ □ □ Ｃ □...

  • Page 14: Explanation Of Code

    Communication Format Explanation of Code ① STX The code necessary for the receiver to detect the beginning of a message. It is put at the beginning of sent characters. ② Address The address to which (this product) the master communicates. The address in a response message from this product shows where the message is sent.
  • Page 15 Communication Format The negation code included in the “response message” of the product and sent with error type information (refer to “⑩ Error type”) when the received “request message” contains an error. ⑩ Error type When the “request message” received by the product contains an error, the content of the error is included and sent subsequently to the “NAK”...

  • Page 16: Cautions For Communication

    Communication Format Cautions for Communication Pay attention to the following points for communication. ① Operation after the power supply is turned on The product cannot communicate for approx. 6 sec. after the power supply is turned on. (No communication). Allow a time delay before starting communication after the power supply is turned on.

  • Page 17: Communication Example

    Communication Format Communication Example  Communication example of request message to read Request message from master: Request the product having a set address of 1 to read the measured temperature at that moment. Response message from the product: Send the measured temperature (00250 =25.0 C) at that moment.
  • Page 18 Communication Format  Communication example of request message to write Request message from master: Request the address having a set address of 10 to set the target temperature to 20.0 Response message from the product: Notice it received the request message properly. ☆...

  • Page 19: Connection

    Communication Format Connection A terminal resistance needs to be mounted on the master and slave that are placed the furthest from each other. The resistance must be suitable for the characteristic impedance of the cables used for connection and have a combined resistance of 75 ohms or more.

  • Page 21: Troubleshooting

    Troubleshooting Troubleshooting The table below shows the solutions for the problems. Problem Cause Solution Connect the host and the thermo- con with the following cables: A wrong connecting cable is used. A straight cable for RS-485 Make the following settings of the host and the thermo-con The settings of the host and consistent:...
  • Page 22 Revision history 4-14-1, Sotokanda, Chiyoda-ku, Tokyo 101-0021 JAPAN Tel: + 81 3 5207 8249 Fax: +81 3 5298 5362 https://www.smcworld.com Note: Specifications are subject to change without prior notice and any obligation on the part of the manufacturer. © 2021 SMC Corporation All Rights Reserved...

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