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New Cosmos Electric PS-8 Series Instruction Manual

Gas detector, communication
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PS-8 Series Gas Detector
for use in semiconductor manufacturing plant
Instruction Manual for Communication
Keep this manual for easy reference.
Read and understand this manual carefully before using this product correctly.
This manual describes the standard model. If your unit has end-user-specific options, this manual will be
superseded by your delivery specifications.
Instruction Manual No.
GAD-180-00
December 2024

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  • Page 1 PS-8 Series Gas Detector for use in semiconductor manufacturing plant Instruction Manual for Communication Keep this manual for easy reference. Read and understand this manual carefully before using this product correctly. This manual describes the standard model. If your unit has end-user-specific options, this manual will be superseded by your delivery specifications.

  • Page 2: Related Manuals

     Operation modes and on-screen menus  Setup procedures  Maintenance procedure, consumable replacement and troubleshooting PS-8 Series Instruction Manual for Communication (this document), No. GAE-180 This document is intended to provide the communication specifications and procedure to establish communication with external devices.

  • Page 3: Introduction

    Introduction Thank you for purchasing the New Cosmos PS-8 series extractive type gas detector (“product” or “unit” hereafter). Prior to use, please read this manual as well as the related manuals and follow the instructions provided for correct use of the product.
  • Page 4 Danger, Warning and Caution, depending on the severity and magnitude of the risks. Carefully read the contents related to the precautions before operation and maintenance work. This manual uses Danger, Warning, Caution and Notice symbols to draw attention to procedures, materials, methods, and processes that require particular attention.

  • Page 5: Model Variations

    Model Variations This product is divided into the following models according to the sensor unit and functions that meet the customer's specifications. Main Unit Collective Power Supply Output Signal Model Contact Output 24 VDC Ethernet Analog Signal (AL1, AL2 and Fault) PS-8M ✔...

  • Page 6: Quick Index

    Quick Index This page lists parts that may be often referenced. Prior to use, please read the precautions in "1 General Precautions". Communication Specifications, Connection Specifications Pages 6 to 9 Communication settings Pages 10 and 11 Register Address Maps Pages 21 to 38...

  • Page 7: Table Of Contents

    1 General Precautions Table of Contents Related Manuals ............................i Introduction ............................... ii Notation Rules for Registered Trademarks ..................ii Precautions ............................ii Symbols Used in this Instruction Manual ..................ii Model Variations ..........................iv Quick Index ............................... v General Precautions ......................... 1 1.1 Before Work ..........................
  • Page 8 1 General Precautions Before Assuming Malfunction ......................46 Glossary ............................47...

  • Page 10: General Precautions

    1 General Precautions General Precautions 1.1 Before Work In order to ensure safe use, please carefully read the precautions in this manual before turning on the product to prevent unexpected accidents. New Cosmos is not liable for any cost incurred or any damage resulting from any usage other than that outlined in this document.

  • Page 11: Labels Affixed To Product

    1 General Precautions • Do not use radio wave-emitting devices (e.g., walkie-talkies, cell phones, wireless devices) in the vicinity of the product. • Do not disassemble, modify, or alter the structure of the product or its electrical circuits. Doing so may compromise product performance. •...
  • Page 12 1 General Precautions Labels for Main Unit and Subunit Item Description Serial number label ① Indicates the serial number of the product. Power rating label ② Indicates the model and the power supply specifications. Environmental label ③ Indicates the applicable certification markings. Pump serial number label ④...

  • Page 13: Disposal

    The service life of this product is 10 years. The unit can operate for up to 10 years with standard installation and operation in accordance with the PS-8 series instruction manuals for installation and operation. When the service life has expired, replacement is essential for continued reliable performance and other purposes.

  • Page 14: System Configuration

    2 System Configuration System Configuration This section explains the PS-8 system configuration. Up to three subunits and up to four expansion units (up to eight modules, two modules per expansion unit) can be connected to a single main unit to form a gas detection system (a maximum of 4 channels or 4 gases).

  • Page 15: Communication Specifications

    3 Communication Specifications Communication Specifications This section explains the communication specifications of this product. The communication system of this product consists of a master and a slave, and is a single-master/multi-slave communication system. As a Modbus slave device, this product can send and receive data to and from a Modbus master device (host device).

  • Page 16: Connection Specifications

    4 Connection Specifications Connection Specifications This section explains the connection specifications of this product. 4.1 Communication System Configuration This section explains an example of the communication system configuration. Modbus TCP (Ethernet) Master device • When the switching hub (HUB) is not PoE-compatible, supply 24VDC power to the NOTE PS-8.

  • Page 17: Example Of Checking The Specifications Of The Modbus Master Device (Host Device)

    4 Connection Specifications 4.1.1 Example of Checking the Specifications of the Modbus Master Device (Host Device) The check contents of specifications are described for a case of using the RJ71EN71 Ethernet Interface Unit of the PLC iQ-R Series by Mitsubishi Electric Corporation as an example. Perform the system design with reference to the following.

  • Page 18: Wiring

    4 Connection Specifications 4.2 Wiring Be sure referring to the "PS-8 Series Instruction Manual for Installation" for information on wiring for Modbus (Ethernet) communication. • Turn the power switch OFF when installing or wiring this product. Failure to do so may result in electric shock.

  • Page 19: Communication Settings

    The IP address and subnet mask can be set in "Device Information" → "IP address/Subnet mask". Example・・・IP address: 192.168.0.101 Subnet mask: 255.255.255.0 Default gateway: 0.0.0.0 For details on this product's operation, please refer to the "PS-8 Series Instruction • NOTE Manual for Operation".

  • Page 20: Network Environment Setting

    5 Communication settings <PC Setting> Set the IP address of PC. Open and change the Internet Protocol (TCP/IP) properties. Example・・・IP address: 192.168.0.102 Subnet mask: 255.255.255.0 Default gateway: 0.0.0.0 5.2.3 Network Environment Setting This product cannot be used via a proxy server. Turn off the proxy server setting on the PC.

  • Page 21: Communication Protocol

    6 Communication Protocol Communication Protocol This section explains the following communication protocols. 6.1 Overview of Modbus Communication Protocol Modbus communication is a single-master/multi-slave communication system. Modbus communication always works in the form of "the master initiates communication and sends a command message, and the slave (this product) sends a response message to the message from the master".

  • Page 22: Communication Procedures

    6 Communication Protocol (2) Function code The function code is a code that specifies the function to be executed by the slave. The slave executes the specified function according to the function code supported by the slave (this product). After the slave successfully executes the function, the same function code is returned with the response message.

  • Page 23: Function Codes

    6 Communication Protocol Refer to "6.4.4 Error Response Message Communication Example" for the message • NOTE configuration when responding to error. If the addresses do not match, the slave discards the command message and waits for the next command message ( no response state). After sending command messages, the master should receive and confirm response messages from slaves.

  • Page 24: Error Codes (Exception Codes)

    6 Communication Protocol When error response messages are returned from the slave (this product), the master should check the contents of the message. 6.3.1 Error Codes (Exception Codes) The error codes (exception codes) supported by this product are shown in the table below. Error codes Error items Error conditions...

  • Page 25: Example Of Message Communication

    6 Communication Protocol 6.4 Example of Message Communication This section describes examples of command/response message communication for each function code supported by this product, as well as examples of message communication for error responses. 6.4.1 Function Code No. 03 (Holding Register Read) Communication Example Function code 03 (0x03 hex) is the function code to read the data of the specified register number in the holding register.

  • Page 26: Function Code No. 06 (Holding Register Write) Communication Example

    6 Communication Protocol Response Message Example Send the current gas concentration value = 25.3%F.S. (0x00FDhex) and the decimal point position = 1 (0x0001 hex) as a response message from the slave to the master. The gas concentration data is hexadecimal data, which is the concentration value multiplied by 10 times the content of the decimal point position, so the value becomes 253 when the concentration value = 25.3.

  • Page 27: Function Code No. 16 (Holding Register Continuous Write) Communication Example

    6 Communication Protocol Response Message Example Send the result of writing 2 (1 word) to the sensor 1 maintenance mode as a response message from the slave to the master. Maintenance mode = 2 (0x0002 hex) Message frame Modbus TCP communication Remarks Data size Hexadecimal...
  • Page 28 6 Communication Protocol Message frame Modbus TCP communication Remarks Data size Hexadecimal Data item Data No. Byte data (byte) (Hex) 0x00 Modbus TCP Transfer ID communication only 0x00 0x00 Modbus TCP Protocol ID communication only 0x00 Fixed at "00 Modbus TCP 0x00 Number of communication only...

  • Page 29: Error Response Message Communication Example

    6 Communication Protocol 6.4.4 Error Response Message Communication Example Send the error response message to the master in the following configuration. The function code for error response is used for the function code of the error response message with "1" set (function code plus 0x80 (hex)) in the most significant bit (MSB) of the command message function code.

  • Page 30: Register Address Maps

    6 Communication Protocol 6.5 Register Address Maps This section explains the register address map where the data used by this product is located. In this product, data such as gas concentration values, status information, and device settings are located in holding registers as the storage destination. It reads and writes the data located in the register number specified in the command message from the master.
  • Page 31 6 Communication Protocol Relative address Register Sensor Words Unit Register item Access Type Data contents 40001 Sensor Status / Fault DWord It reads the status of sensor 1 or the Fault simulation test simulation test mode status (in fault simulation status test).
  • Page 32 6 Communication Protocol Relative address Register Sensor Words Unit Register item Access Type Data contents 40003 Sensor Fault detail Word It reads the fault detail status or the fault detail status / Fault status of fault simulation test mode (in fault detail status in simulation test).
  • Page 33 6 Communication Protocol Relative address Register Sensor Words Unit Register item Access Type Data contents 40008 Sensor Same as Word Register items and data contents are the same Sensor1 as Sensor1, refer to relative address 0 to 7. 40015 Sensor (periodic data) Concentration data is the integer value.
  • Page 34 6 Communication Protocol Relative address Register Sensor Words Unit Register item Access Type Data contents 40132 Sensor Flow rate Word Same as relative address 6. 40133 Sensor Same as Word Register items and data contents are the same Sensor1 as Sensor1, refer to relative address 125 to 131. 40140 Sensor (periodic data)
  • Page 35 6 Communication Protocol Relative address Register Sensor Words Unit Register item Access Type Data contents 40261 Main Date and time Word It is read/write the set date and time (minutes and (minutes, seconds) of the device. seconds) Upper byte: seconds Lower byte: minutes Example: 35 minutes and 05 seconds →...
  • Page 36 6 Communication Protocol Relative address Register Sensor Words Unit Register item Access Type Data contents 40311 Sensor Alarm setting DWord It is read/write the alarm setting (AL1) value in (AL1) (floating floating point (IEEE754 single-precision). point) Example: In the case of Alarm 1 value = 25.3, (change 0x41CA6666 (hex) notification)
  • Page 37 6 Communication Protocol Relative address Register Sensor Words Unit Register item Access Type Data contents 40329 Sensor Tag name Char It is read/write the tag name of Sensor1. (change [16] The character string is read in ASCII code notification) (hexadecimal) every 2 bytes from the beginning, with the 2nd byte being the upper byte and the 1st byte being the lower byte.
  • Page 38 6 Communication Protocol Relative address Register Sensor Words Unit Register item Access Type Data contents 40384 Sensor Relay (Alarm2) Word It is read/write the energized setting of sensor1's alarm contact (Alarm2). 0x0000 (hex): Normally not energized 0x0001 (hex): Normally energized 40385 Sensor Relay (Fault)
  • Page 39 6 Communication Protocol Relative address Register Sensor Words Unit Register item Access Type Data contents 40907 Sensor Same item as Word Same as relative addresses 300 to 396 ～ ～ ～ relative Example (for status): Relative address 906, 41007 1006 addresses 300 obtained by adding 606 to relative address 300, to 396...
  • Page 40 6 Communication Protocol Relative address Register Sensor Words Unit Register item Access Type Data contents 42469 2468 Sensor Gas name Char It is read/write the gas name of the target sensor (change [16] 42477 2476 Sensor notification) Refer to relative address 320 for data contents. 42485 2484 Sensor...
  • Page 41 6 Communication Protocol Relative address Register Sensor Words Unit Register item Access Type Data contents 42597 2596 Sensor Full scale R/W* Word It is read/write the full scale value of the target (floating point) sensor Ch. in floating point (IEEE754 single- 42599 2598 Sensor...
  • Page 42 6 Communication Protocol Relative address Register Sensor Words Unit Register item Access Type Data contents 42649 2648 Sensor Alarm mode Word It is read the alarm mode information of the target (change sensor Ch. 42650 2649 Sensor notification) Refer to relative address 319 for data contents. 42651 2650 Sensor...
  • Page 43 6 Communication Protocol Relative address Register Sensor Words Unit Register item Access Type Data contents 42729 2728 Sensor Concentration Word It is read the gas concentration value (integer) of (integer) the target sensor Ch. 42730 2729 Sensor Refer to relative address 4 for data contents. 42731 2730 Sensor...
  • Page 44 6 Communication Protocol Relative address Register Sensor Words Unit Register item Access Type Data contents 42793 2792 Sensor Concentration Word It is read the gas concentration value (floating (floating point) point) of the target sensor Ch. 42795 2794 Sensor Refer to relative address 129 for data contents. 42797 2796 Sensor...
  • Page 45 6 Communication Protocol Relative address Register Sensor Words Unit Register item Access Type Data contents 42841 2840 Sensor Alarm setting Word It is read/write the alarm setting (AL2) (floating (AL2) (floating point) of the target sensor Ch. 42843 2842 Sensor point) Refer to relative address 312 for data contents.
  • Page 46 6 Communication Protocol Relative address Register Sensor Words Unit Register item Access Type Data contents 42873 2872 Sensor Maint mode Word It is read/write the maintenance mode settings of setting the target sensor Ch. 42874 2873 Sensor Refer to relative address 389 for data contents. 42875 2874 Sensor...
  • Page 47 6 Communication Protocol Relative address Register Sensor Words Unit Register item Access Type Data contents 42935 2934 Sensor Alarm test mode Word It is read/write the alarm test mode (floating point) (floating point) of the target sensor Ch. 42937 2936 Sensor Refer to relative address 392 for data contents.

  • Page 48: Device Status Information

    For description of the main unit's operation during the gas alarm, refer to "7.1 Gas NOTE Alarm Operation" in "PS-8 Series Instruction Manual for Operation". Register No. 40001 (for sensor 1) status information data is double-word size and consists of the upper word (lower register number) and the lower word (higher register number).

  • Page 49: Explanation Of Operation At Trouble Alarm

    NOTE Fault Alarm Operation" in "PS-8 Series Instruction Manual for Operation". • For description of the main unit's LCD screen, refer to "4.1.4 LCD" in "PS-8 Series Instruction Manual for Operation". (1) Flow rate decrease fault When not flowing at the specified flow rate.
  • Page 50 7 Device Status Information Trouble Register Register item Data contents alarm type 0: Normal / 1: Abnormal Upper word Bit15 bit8 Flow rate decrease bit7 bit0 Bit3: Low flow failure 0: Normal / 1: Abnormal Upper word Bit15 bit8 Sensor related collective fault...

  • Page 51: Explanation Of Test Mode Settings And Operation

    When the test mode is entered, "TEST" is displayed on the LCD of this product. The test mode is automatically cancelled after 10 minutes. For setting of the main unit's test mode, refer to "10.8 Alarm Test" in "PS-8 Series •...
  • Page 52 7 Device Status Information The master can check the status of the test mode by reading the register number No. 40001 (for sensor 1) status information in Modbus communication. Register No. 40001 (for sensor 1) status information data is double-word size and consists of the upper word (lower register number) and the lower word (higher register number).

  • Page 53: Explanation Of Maintenance Mode Settings And Operation

    For the setting and operation description of Maintenance Mode 1 and Maintenance NOTE • Mode , refer to "8 Maintenance Mode" in the "PS-8 Series Instruction Manual for Operation". When 1 is set to the maintenance mode setting register via Modbus communication from the master (host device), maintenance mode 1 is selected.
  • Page 54 • Each maintenance mode remains in maintenance mode even after restart. However, the automatic cancellation time will be reset. For the specifications of the main unit's gas alarm contact and trouble alarm contact, • NOTE refer to "14 Specifications" in the "PS-8 Series Instruction Manual for Operation".
  • Page 55 8 Before Assuming Malfunction Before Assuming Malfunction Before requesting a repair, please refer to the table below. If the product does not return to normal operation after performing the corresponding steps in the table or if your issue is not found in the table, consult New Cosmos or its authorized representative.
  • Page 56 9 Glossary Glossary Term Definition Gas detector Device used to detect the presence of a target gas and to give its (or gas detector concentration in the form of an electrical signal. head) The lowest concentration at which an explosion occurs due to ignition when combustible gas and air are mixed.

  • Page 58: Authorized Representative

    Revision GAE-180-00 December 2024 00 (Initial issue) Additional copies of this instruction manual may be purchased. Contact New Cosmos or its authorized representative for ordering. Authorized representative: Manufacturer: NEW COSMOS ELECTRIC CO., LTD. 2-5-4 Mitsuya-naka, Yodogawa-ku, Osaka 532-0036, Japan www.newcosmos-global.com...

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