Here is an article about a new series from Keyence, the SR-750 series of compact 2D code readers! In this article, we will show you the simple setup required to use the SR-750, and how to connect and program the Beckhoff TwinCAT3 and Etherent/IP.

(From Youtube Channel Comment Request)

Let’s get started!

Reference Video

Beckhoff.Use Keyence SR750 with TwinCAT3 and Etherent/IP

SR750?

Despite its compact size, the SR-750 is capable of stable automatic reading of even difficult-to-read codes, and uses a new algorithm for acquisition and processing.

It thereby achieves best-in-class reading performance even for difficult-to-read codes, and can stably read codes printed directly on workpieces (DPM) made of various materials.

Tool Installation

You need AutoID Network Navigator to set up the SR-750, so get the software from Keyence.

Agree to the license and proceed with Next>.

Proceed with Next>.

Select the software language and start Install.

Just a second..

Done!

Do you want to start the FTP Server? No is OK for now.

Startup

Launch AutoID Network Navigator.

Done!

Register Device

To connect to the SR-750 on hand, click the + button to register the device.

The screen for selecting the Interface to connect with SR-750 is displayed, this time connecting with Etherent.

Next, configure the Interface of the PC.

By the way, the IP address of SR-750 is 192,168.100.100.

Next, the device search screen will appear, and you can use Auto Search to search for devices.

Done!SR-750 is found.

The device just registered in the device list has a green light, meaning it is currently connected to the PC and the SR-750.

Monitor

Click on the Monitor button to see a live image of the current camera.

The camera can also recognize the 2D code well.

In the lower right corner, the Reading Test table provides 2D code data and test results.

Tuning

You can also click the Tuning button to automatically adjust the camera.

Done!

Code

Open Code to set the 2D code to read each bank.

Set the Code from the Drop List.

Done!

Return to Reading Tab.

Below, you changed Bank2 to DataMatrix.

Result

Done!It was also detected in the DataMatrix code.

Send Configuration

Once you have completed the setup of the SR-750, use Transfer>Send Configuration to transfer your project to the device.

Retrieve Configuration

You can also upload the configuration by using ”Retrieve Configuration” Function.

Ethernet/Ip?

EtherNet/IP is an industrial communication network proposed by ODVA (Open DeviceNet Vendor Association Inc.

It is an industrial communication network proposed by ODVA (Open DeviceNet Vendor Association, Inc.),

EtherNet/IP communication can share a network with normal Ethernet communication.

Scanner and adaptor

In EtherNet/IP communication, one device opens a communication line, called a “connection,” to another device.

The device that opens the connection is called the “scanner” (originator) and the receiving device is called the “adapter” (target); the PLC is used primarily as the scanner and the SR-750 is the adapter device.

Cyclic communication and message communication

In EtherNet/IP, there are two types of communication: cyclic communication (Implicit message), in which cyclic data is sent and received, and message communication (Explicit message), in which command/response is sent and received.

(Explicit message).

Cyclic communication

Cyclic Communication Cyclic communication allows the RPI (communication cycle) to be set according to the priority of data to be sent and received. Data can be sent and received with the overall communication load adjusted.

When using EtherNet/IP for cyclic communication with the SR-750 series, the SR-750 series functions are assigned to PLC devices.

Note that communication settings such as communication cycle and data size for cyclic communication are made on the PLC side. Also, in a network connecting many devices including EtherNet/IP devices, delays or packet loss may occur if the load is heavy. Please verify the settings thoroughly before operation.

Function Overview

Reading instruction

It also performs read instructions, as well as operations such as end-of-reading, bank setting reading, etc.

Preset instructions

Records normally read data as preset data. It also registers or deletes preset data from the PLC.

Calibration instructions

Calibration can be performed and calibration results can be stored in a set bank.

Error-handling

Checks for the cause of an error in the main unit and returns an error.

(For example: Buffer overflow check/cancellation)

Main unit status acquisition

Check the status of the main unit (BUSY status).

Operation results acquisition

When set to silent mode, readings are not updated.

Terminal status acquisition

Obtains the status of input and output terminals.

Main unit reset instructions

Displays the software reset for the SR-750 series.

Assemblies

Result data (Input Assemblies)

The input assembly is a device that writes responses from the SR-750 series to the PLC.

(Instance ID: 0x64)

Control data (Output Assemblies)

The output assembly is a device that writes commands from the PLC to the SR-750 series.

(Instance ID: 0x65)

Message communication

In message communication, timing is controlled by command/response.

Specification Of SR-750

This is for SR-750 Ethernet/IP connection use.

Time chart

Implementation

Keyence Side

IPComm

Open the Tab of Communication1 and set the IP address and Subnet Mask of the SR-750.

Comm

Next, open the Communication2 Tab and set Data Port2 to Ethernet.

Protocol

Then set Protocol to Ethernet/IP and click the Details button.

You can set the data size and Byte Swaping for Ethernet/IP connections, but leave it at Default this time.

Table

Open the Table Tab to list and set SR750 parameters.

TwinCAT3 Side

Now set up the TwinCAT3 side.

Install EDS File

Download the EDS File for SR-750 from Keyence HP and store it in the following Directory.

Add Devices

Add a new Fieldbus Driver under I/O>Devices>Add New Item.

Select Etherent/IP>Ethernet/IP Scanner>Ok to proceed.

Open the Adapter’s Tab and click the Search button to set the Scanner Network Interface to be used as the Etherent/IP Scanner.

Lists the Network Interfaces currently available on IPC.

Task

Next, open the Sync Task to add the Ethernet/IP Scanner Task.

Select Special Sync Task > Create new I/O Task.

Enter a new Task name.

Done!

Scanner IP

Next, set the IP address of the Ethernet/IP Scanner. Click on the Ethernet/IP Scanner you just added.

Open the Settings Tab.

Set the IP address, Network Mask, and Gateway address in F800.0.

Done!

Add SR-750 Adapter

Now that the Ethernet/IP Scanner configuration is complete, the next step is to add Keyence’s Ethernet/IP Adapter SR-750. Right click on the Scanner you just configured and select Add New Item.

Select SR-750>Ok.

Done!

Adapter IP

Set the Ip address of the Keyence SR-750 from Settings>8000.0.

In this Tutorial, it will be 192.168.100.100.

Add Connection

Now we can Configure Ethernet/IP Connection between Beckhoff TwinCAT3 and Keyence SR-750.Right click on the Keyence SR-750 Adapter you just added>Append IO Connection>Class1.

Do you want to automatically create variables along with the EDS File?

Done!Connection has been added.

Etherent/IP communication settings should be configured according to the actual application.

Add PLC

Now that we have finished setting up Fieldbus, the next step is to create a PLC program.

PLC>右クリック>Add New Itemします。

Select Standard PLC Project>Add.

DUT

DUT_SR750_EIP_INData

This is a structure defined for the Input Assembly of SR750 Ethernet/IP.

TYPE DUT_SR750_EIP_INData :
STRUCT
Error :BIT; //Buffer Overflow Error OR General Error is ON.
ResultDataAvailable:BIT; //This displays whether read data exists or not,using in Handshake
ResultDataStrobe:BIT; //

BufferOverFlow:BIT; //buffer overflow error occurs.
GeneralError:BIT;
Busy:BIT; //TryBusy,LockBusy,ModeBusy or ErrBusy is on
TryBusy:BIT;
LockBusy:BIT;
ModeBusy:BIT;
ErrBusy:BIT;

ReadComplete:BIT; //when reading is complete
PresentComplete:BIT; //when preset reading is complete.
RegisterPresetDataComplete:BIT; //when preset data registration is complete.
TuneComplete:BIT; //when tuning is complete.

EXTRequestComplete:BIT; //when “Reading”, “Preset reading” or “Tuning” is performed with the IN terminal or command and the operation is complete.
ReadFailure:BIT; //when reading error or comparison NG occurs.
PresentFaliure:BIT; //when preset reading fails.
RegisterPresetDataFailure:BIT; //when preset data registration fails.
TuneFailure:BIT; //when tuning fails.
EXTRequestFailure:BIT; //when “Reading”,”Preset reading” or “Tuning” is performed with the IN terminal or command and the operation fails.
IN1Status:BIT; //This represents IN1 terminal status.
IN2Status:BIT; //This represents IN2 terminalstatus.

OUT1Status:BIT; //This represents OUT1 terminal status.
OUT2Status:BIT; //This represents OUT2 terminal status.
OUT3Status:BIT; //This represents OUT3 terminal status.
noname5_arrBIT:BIT;

Unstable:BIT; //ON when any of the following Unstable Bits (9 to 12) is ON.
MatchingLevelUnstable:BIT; //Matching level judgment result
ISOIEC15415Unstable:BIT; //ISO/IEC15415 verification judgment resul
AIMDPMUnstable:BIT; //ISO/IEC TR 29158 (AIM DPM-1-2006) verification judgment result
SAEAS9132Unstable:BIT; //SAE AS9132 Unstable verification judgment result

MatchingLevel:UINT;
ISOIEC15415Grade:UINT;
AIMDPMGrade:UINT;

ReadResultCode:UINT;
PresentResultCode:UINT;
RegisterPresetDataResultCode:UINT;
TuneResultCode:uint;

EXTRequestResultCode:UINT;
GeneralErrorCode:UINT;

ReadyDataReadyCount:UINT;
ReadyDataUpdateCount:UINT;

ResultDataSize:UINT;
ResultData:ARRAY[0..127]OF BYTE;

END_STRUCT
END_TYPE

DUT_SR750_EIP_OutData

This is a structure defined for the SR750 Ethernet/IP Output Assembly.

TYPE DUT_SR750_EIP_OutData :
STRUCT
ResultDataLatch:BIT;

ErrorClear:BIT;
ReadRequest:BIT; //The SR-750 Series starts reading.
PresetRequest:BIT; //Preset reading starts.
RegisterPresetDataRequest:BIT; //Specified preset data is registered to Address 5, 6 and above
TuneRequest:BIT; //Tuning starts

ReadCompleteClear:BIT; //”Reading Complete” Bit of Input Assemblies is cleared.
PresetCompleteClear:BIT; //”Preset Reading Complete” Bit of Input Assemblies is cleared.
RegisterPresetDataCompleteClear:BIT;//”Preset Data Registration Complete” Bit of Input Assemblies is cleared.

TuneCompleteClear:BIT; //”Tuning Complete” Bit of Input Assemblies is cleared.

EXTRequestCompleteClear:BIT; //”External Instruction Operation Complete” Bit of Input Assemblies is cleared.
BankNumber:UINT; //Input a bank number here and start reading.

UserDataSize:UINT;
UserData:array[0..63]OF BYTE;

END_STRUCT
END_TYPE

DUT_SR750_EIP

This is the structure that summarizes the Input Assembly and Output Assembly that we just mentioned.

TYPE DUT_SR750_EIP :
STRUCT
in AT %I*:DUT_SR750_EIP_INData;
out AT %Q*:DUT_SR750_EIP_OutData;
CommStatus AT %I*:UINT;

END_STRUCT
END_TYPE

DUT_HMI_SR750_PB

This is the structure that operates the SR750 from the HMI.

TYPE DUT_HMI_SR750_PB :
STRUCT
bRead:BOOL;
bClear:BOOL;
bReset:BOOL;
END_STRUCT
END_TYPE

DUT_HMI_SR750_PL

This is a structure that displays the status of SR750 on the HMI.

TYPE DUT_HMI_SR750_PL :
STRUCT
Status:DUT_SR750_EIP_INData;
Data:STRING;
END_STRUCT
END_TYPE

DUT_HMI_SR750

This is the structure that summarizes the operation and display of the HMI.

TYPE DUT_HMI_SR750 :
STRUCT
PB:DUT_HMI_SR750_PB;
PL:DUT_HMI_SR750_PL;
END_STRUCT
END_TYPE

GVL

GVL_HMI

This is the Global variable for HMI operation.

{attribute ‘qualified_only’}
VAR_GLOBAL
SR750_1:DUT_HMI_SR750;
END_VAR

GVL_Mapping

This is the Global variable for Mapping Ethernet/IP data for SR750.

{attribute ‘qualified_only’}
VAR_GLOBAL
SR750_1:DUT_SR750_EIP;
END_VAR

Program

This program triggers the SR750 via Ethernet/IP, acquires its status and displays it on the HMI.

PROGRAM MAIN
VAR
Result:STRING;
bRead:BOOL;
R_TRIG:R_TRIG;
END_VAR

GVL_Mapping.SR750_1.out.ReadRequest:=GVL_HMI.SR750_1.PB.bRead
AND GVL_Mapping.SR750_1.CommStatus=0
;

R_TRIG(CLK:=GVL_Mapping.SR750_1.out.ReadRequest);
IF R_TRIG.Q THEN
Result:=’ ‘;
END_IF

IF GVL_Mapping.SR750_1.in.ReadComplete THEN
MEMMOVE(
destAddr:=ADR(Result)
,srcAddr:=ADR(GVL_Mapping.SR750_1.in.ResultData)
,n:=GVL_Mapping.SR750_1.in.ResultDataSize);
ELSIF GVL_Mapping.SR750_1.in.ReadFailure THEN
GVL_HMI.SR750_1.PL.Status.ResultDataSize:=0;
GVL_HMI.SR750_1.PL.Data:=’ERROR!!!!’;
END_IF;

GVL_Mapping.SR750_1.out.ErrorClear:=GVL_HMI.SR750_1.PB.bReset;
GVL_Mapping.SR750_1.out.ReadCompleteClear:=GVL_HMI.SR750_1.PB.bClear;

GVL_HMI.SR750_1.PL.Status:=GVL_Mapping.SR750_1.in;
GVL_HMI.SR750_1.PL.Data:=Result;