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Technical
Information
TI 01W06A51-10EN
Contents
Introduction .............................................................................................................1
1.
About LoRaWAN ...........................................................................................2
2.
Installation Guide .........................................................................................3
2.1
Gateway Installation Guide ................................................................................. 3
2.2
Sushi Sensor Installation Guide ......................................................................... 4
2.3
Influence on Existing Devices ............................................................................ 5
3.
Maximum Communication Distance ..........................................................6
4.
Evaluation of Communication Stability .....................................................8
5.
Glossary ........................................................................................................9
Revision Information ............................................................................................11
Sushi Sensor System
LoRaWAN Installation Guide
Yokogawa Electric Corporation
2-9-32, Nakacho, Musashino-shi, Tokyo, 180-8750 Japan
Tel.: 81-422-52-5885 Fax.: 81-422-52-2102
TI01W06A51-10EN
©Copyright Mar. 2019
1st Edition Mar. 2019
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Summary of Contents for YOKOGAWA Sushi Sensor System
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Page 1: Table Of Contents
Technical Sushi Sensor System LoRaWAN Installation Guide Information TI 01W06A51-10EN Contents Introduction ......................1 About LoRaWAN ...................2 Installation Guide ..................3 Gateway Installation Guide ................. 3 Sushi Sensor Installation Guide ................. 4 2.3 Influence on Existing Devices ................5 Maximum Communication Distance ............6 Evaluation of Communication Stability .............8 Glossary ......................9 Revision Information ....................11... -
Page 2: Introduction
Introduction This document provides guidance on how to install devices so that the Sushi Sensor system using LoRaWAN operates in a stable manner. For details on how to install devices, e.g., how to secure a sensor and a gateway, refer to the relevant manuals. -
Page 3: About Lorawan
About LoRaWAN The Sushi Sensor adopts the LoRaWAN communication system that has high-level receiving sensitivity and resistance to radio-frequency interference, and that offers a communication distance of 10 km or more in an ideal communication environment. The LoRaWAN communication system is specifi cally designed for IoT (Internet of Things) applications and provides power-saving and long-distance communication features standardized by LoRa Alliance. -
Page 4: Installation Guide
Install the antenna perpendicular to the ground. The antenna of a general LoRaWAN gateway used in the Sushi Sensor system is designed so that the quality of wireless communications reaches the utmost level when the antenna is installed perpendicular to the ground. -
Page 5: Sushi Sensor Installation Guide
Install the gateway in a location where there are no other wireless system devices that use the same frequency band in its vicinity. If the antenna of another wireless system is near the gateway, LoRaWAN communication characteristics may be negatively impacted. LoRaWAN uses the 800 MHz frequency band. To minimize the infl uence, install the gateway as far away as possible from any wireless systems and mobile phone base stations that use the same frequency band. -
Page 6: Influence On Existing Devices
Avoiding locations near the ground When it comes to establishing wireless communication, the ground is an enormous obstacle. Stable communications can be possible by installing the sensor far above the ground. Installing the Sushi Sensor perpendicular to the ground Install the Sushi Sensor perpendicular to the ground whenever possible. The Sushi Sensor is designed so that the quality of wireless communication reaches the utmost level when it is installed perpendicular to the ground. -
Page 7: Maximum Communication Distance
[*1] This table shows the maximum communication distance values when Yokogawa Wireless Vibration Sensor (XS770A) is used as a Sushi Sensor. If long-distance communication cannot be established between the Sushi Sensor and the gateway, no communications can be established because the Sushi Sensor is installed indoors, or communications are consistently unstable, consider installing an additional gateway. - Page 8 Examples of case I Riverside or seashore Oil drilling well Pipeline Broad flat area Examples of case II Outdoor plant environment, pipe jungle Tank yard Mine, raw materials storage yard Belt conveyor Examples of case III Indoor production site Building TI 01W06A51-10EN Mar.26,2019-00...
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Page 9: Evaluation Of Communication Stability
Evaluation of Communication Stability The RSSI, SNR, and PER values that can be viewed in the Application, on Sushi Sensor APP, or on the gateway management screen are important indexes used to evaluate communication stability. In a future revision of this document, specific thresholds for evaluating communication status will be included as guidelines. For details on how to evaluate communication stability before the threshold guidelines are provided, contact our Sushi Sensor Information Service. TI 01W06A51-10EN Mar.26,2019-00... -
Page 10: Glossary
On the other hand, if high-level noises exist in the same communication bandwidth, it may be difficult to establish communications even if the RSSI is high. In such a case, check the communication environment together with the SNR value described later. You can check two RSSI values in the Sushi Sensor system. RSSI measuring Checking method device... - Page 11 • PER (Packet Error Rate) Indicates the communication failure rate when wireless communication is established actually. The PER value is calculated as shown below. PER (%) = Number of packets that were not sent correctly ÷ Total number of sent packets x 100 When packets sent from the Sushi Sensor did not arrive at the gateway, or the system failed toreceive the delivery acknowledgment packet (ACK) from the gateway although it received the sent packets, it is judged that sending has failed. The Sushi Sensor resends the packets when sending has failed. When the PER value is low, it is judged that the communication is successful with fewer number of data transmission. When the PER value continues to be high, affects the battery life due to the number of retransmission. In the Sushi Sensor system, check the PER value using the following method. PER measuring Checking method device PER from Sushi Sensor to Sensor...
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Page 12: Revision Information
Revision Information Title : Sushi Sensor System LoRaWAN Installation Guide Manual number : TI 01W06A51-10EN Edition Date Revised Item March 2019 New issue TI 01W06A51-10EN Mar.26,2019-00...
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