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Case｜LabVIEW connects to S7-1200PLC

2024-07-12

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Comes with:
Wrote good reference articles:
Tutorial on connecting the communication test tool and the Botu simulator[Contains complete process with pictures and text + software usage]

Solve the problem that higher versions such as Botu V15 V16 V17 V18 and lower versions are incompatible on the same PLC

Table of contents

Preface

以下默认读者已经有LabVIEW、PLC软件的基本使用基础
Realize the communication function between LabVIEW and S7-1200PLC.
specific:
1) Check whether the connection is successful (indicated by a light bulb)
2) Write data to PLC
3) Read data from PLC

1. Preparatory conditions

  • software:
    S71200PLC Software
    LabVIEW2020
    HslCommunicationDemo software
  • hardware:
    PLC Hardware

2. Steps

1. HslCommunicationDemo

Step1. Open the Siemens PLC project and check the IP address of the interface [here I have actual PLC hardware, connected to the laptop via an Ethernet cable, and set the IP to 192.168.0.1], and make the IP address in HslCommunicationDemo the same.
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Step 2. Go back to PLC, go to the connection mechanism, and check Allow remote communication access.
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Step 3. Go back to Demoz and click Connect. It will be OK when it prompts that the connection is successful.
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Question 1: Connection failed?

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Solution to the connection failure in the above figure:

  • Check if it is restricted by the firewall

Question 2: CPU hardware does not match the hardware on the Botu? [2 solutions

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方法1

I went searching a lot about the incompatibility between the program version on the CPU and the STEP 7 project version V16.
This article inspired me:Solve the problem that higher versions such as Botu V15 V16 V17 V18 and lower versions are incompatible on the same PLCHe said博图V17依旧有一个小问题，他这个创建好了，但是固件版本依然是4.5版本的，所以我们需要重新更改一下，点击在线和诊断。
I followed the steps, but I found that after I connected to my PLC online, the firmware version was V4.5, not 4.2. But I have V16, and the highest version is only 4.4. [As shown in the figure below:

Steps: First connect online, click Online and Diagnose
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Finally, I only executed复位为出厂设置After reconnecting to the PLC and uploading from the device, all the way to green light.
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方式2: Download the hardware package directly [not verified yet]

Hardware package download address
After entering, find your Botu PLC software version number and download the full version.
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The V16 package obtained after downloading:
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After decompression, there are various ISP files
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Install in "Tools" -> "Installation Package" [as shown below]
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1.LabVIEW

Step 1. Connect to PLC

Rear Panel:
1)Interconnection interface->.NET->Constructor node
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2) In the constructor, select the HslCommunication.dll file. The HslCommunication configuration items will appear.
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3) Specific options in configuration items

  • HslCommunication.Profinet.Siemens->SiemensS7Net->SimensS7Net构造器
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4) Final back panel configuration
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After startup, the front panel effect is:
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Step 2. Write data to PLC and read data from PLC

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Front panel operation effect:
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2. 1200PLC cannot upload from the device?

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3. Use HslDemo test tool to control

Prerequisite: HslDemo tool has been connected to PLC
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Step 1. Draw a simple diagram in Main in Botu PLC

The I0.1 and Q0.1 here are the names of the interfaces that come with the CPU board when you click Add New Device [regardless of whether they are physically connected or not]
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In the single data write test of the HslDemo test tool, write Q0.2, and the value is 1. After clicking bool write, you can see that the PLC is connected in real time. [Proof of successful test]
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4

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Update time

2024-07-10
2024-07-11 Resolved hardware mismatch issue.
2024-07-12 Updated the hardware package download to solve the problem of hardware version number mismatch. [However, the verification process of re-establishing the project after the last step of installation was not done, and the credibility is unknown]

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