Autonics BD Series User manual

User Manual
for communication
Displacement Sensor
BD Series
MSO-BDC1-V1.0-2001US
Thank you for purchasing an Autonics product.
This user manual contains information about the product and its proper use,
and should be kept in a place where it will be easy to access.
www.autonics.com

2

Preface
3
Preface
Thank you for purchasing Autonics product.
Please familiarize yourself with the information contained in the Safety Considerations
section before using this product.
This user manual contains information about the porduct and its proper use, and should be
kept in a place where it will be easy to access.

User Manual Guide
4
User Manual Guide
Please familiarize yourself with the information in this manual before using the product.
This manual provides detailed information on the product's features. It does not offer
any guarantee concerning matters beyond the scope of this manual.
This manual may not be edited or reproduced in either part or whole without
permission.
This manual is not provided as part of the product package. Please visit our website
(www.autonics.com) to download a copy.
The manual's content may vary depending on changes to the product's software and
other unforeseen developments within Autonics, and is subject to change without prior
notice. Upgrade notice is provided through our homepage.
We contrived to describe this manual more easily and correctly. However, if there are
any corrections or questions, please notify us these on our website.

User Manual Symbols
5
User Manual Symbols
Symbol
Description
Supplementary information for a particular feature.
Failure to follow instructions can result in serious injury or death.
Failure to follow instructions can lead to a minor injury or product
damage.
An example of the concerned feature's use.
※
Annotation mark.

Safety Considerations
6
Safety Considerations
Following these safety considerations will ensure the safe and proper use of the product
and help prevent accidents, as well as minimizing possible hazards.
Safety considerations are categorized as Warnings and Cautions, as defined below:
Warning
Failure to follow the instructions may lead to a serious
injury or accident.
Caution
Failure to follow the instructions may lead to a minor
injury or accident.
Fail-safe device must be installed when using the unit with machinery that may cause
serious injury or substantial economic loss. (e.g. nuclear power control, medical
equipment, ships, vehicles, railways, aircraft, combustion apparatus, safety equipment,
crime/disaster prevention devices, etc.)
Failure to follow this instruction may result in personal injury, economic loss or fire.
Do not use the unit in the place where flammable/explosive/corrosive gas, high
humidity, direct sunlight, radiant heat, vibration, impact, or salinity may be present.
Failure to follow this instruction may result in explosion or fire.
Do not disassemble or modify the unit.
Failure to follow this instruction may result in fire.
Do not connect, repair, or inspect the unit while connected to a power source.
Failure to follow this instruction may result in fire.
Check 'Connections' before wiring. [Amplifier unit]
Failure to follow this instruction may result in fire.
Do not stare at the laser emitter. [Sensor head]
Failure to follow this instruction may result in eye damage.
Use the unit within the rated specifications.
Failure to follow this instruction may result in fire or product damage.
Use dry cloth to clean the unit, and do not use water or organic solvent.
Failure to follow this instruction may result in fire.
Mount the ferrite core to specified position before using. [Sensor head, Extension cable]
Failure to follow this instruction may result in output with noise.

Cautions during Use
7
Cautions during Use
Follow instructions in 'Cautions during Use'. Otherwise, it may cause unexpected
accidents.
The power supply should be insulated and limited voltage/current or Class 2, SELV
power supply device.
Do not install where strong magnetic or electric field exist. Otherwise, the resolution
may be adversely affected.
Mutual optical interference between laser sensors and photoelectric sensors may result
in malfunction.
Mutual optical interference between laser sensors may result in malfunction.
When connecting DC relay or other inductive load to the output, remove surge by using
diode or varistor.
Wire as short as possible and keep away from high voltage lines or power lines, to
prevent surge and inductive noise. [ Amplifier unit]
For the optimized performance, it is recommended to measure after 30 minute from
supplying power. [Amplifier unit]
Since external disturbance light (sunlight, fluorescent lighting, etc.) can cause product
malfunction, use the product with a light shield or slit. [Sensor head]
When detecting with the maximum sensitivity, an error may occur depending on each
characteristic deviation.
This unit may be used in the following environments.
① Indoors/Outdoors (in the environment condition rated in 'Specifications')
② Altitude max. 2,000m
③ Pollution degree 2
④ Installation category II
The specifications are subject to change and some models may be discontinued without
notice.
Be sure to follow cautions written in the instruction manual, user manual and the technical
descriptions (catalog, website).

Table of Contents
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Table of Contents

1 Communication Overview
9
1Communication Overview
Modbus
The Modbus industrial protocol was developed in 1979 to make communication possible
between automation devices. T he protocol has expanded to include implementations over
serial, TCP/IP, and the user datagram protocol (UDP). Today, it is a common protocol used
by countless devices for simple, reliable, and efficient communica tion across a variety of
modern networks.
Refer to the reference document of developer for the details
Communication of BD-C series is based on Modbus RTU.
Frame Structure of Modbus RTU
Read Coil Status (Func 01 01H)
Read output (OX reference, Coil) ON/OFF status in the slave device.
Query (Master)
Slave
Address
Function
Starting Address
No. of Points
Error Check (CRC16)
High
Low
High
Low
Low
High
1Byte
1Byte
1Byte
1Byte
1Byte
1Byte
1Byte
1Byte
Response (Slave)
Slave
Address
Function
Byte Count
Data
Data
Data
Error Check (CRC16)
Low
High
1Byte
1Byte
1Byte
1Byte
1Byte
1Byte
1Byte
1Byte
CRC16
CRC16

1 Communication Overview
10
Read Input Status (Func 02 02H)
Read Input ON/OFF status (1X reference) in Slave device.
Query (Master)
Slave
Address
Function
Starting Address
No. of Points
Error Check (CRC16)
High
Low
High
Low
Low
High
1Byte
1Byte
1Byte
1Byte
1Byte
1Byte
1Byte
1Byte
Response (Slave)
Slave
Address
Function
Byte Count
Data
Data
Data
Error Check (CRC16)
Low
High
1Byte
1Byte
1Byte
1Byte
1Byte
1Byte
1Byte
1Byte
Read Holding Register (Func 03 03H)
Read the Binary data of Holding Registers (4X reference) in Slave device.
Query (Master)
Slave
Address
Function
Starting Address
No. of Points
Error Check (CRC16)
High
Low
High
Low
Low
High
1Byte
1Byte
1Byte
1Byte
1Byte
1Byte
1Byte
1Byte
Response (Slave)
Slave
Address
Function
Byte Count
Data
Data
Data
Error Check (CRC16)
High
Low
High
Low
High
Low
Low
High
1Byte
1Byte
1Byte
1Byte
1Byte
1Byte
1Byte
1Byte
1Byte
1Byte
1Byte
CRC16
CRC16
CRC16
CRC16