easys7comm 0.2.3

A abstraction of python-snap7

EasyS7Comm

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⚠️ Important Notice

EasyS7Comm is currently in the early stages of development and is not ready for use in production.

Description

EasyS7Comm is a simplified abstraction of the powerful Python-Snap7 tool. This project was created to make Snap7 accessible to automation professionals with limited programming knowledge. With EasyS7Comm, you can perform read and write operations on variables quickly and efficiently using minimal code.

While EasyS7Comm abstracts some of Python-Snap7's advanced features, this trade-off is ideal for those who need straightforward and easy-to-use automation solutions.

Features

• Read Variables:
• Write Variables:
• Simplified Connection:
• Error Management:

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Prerequisites

Python

Ensure you have Python installed on your system.

Snap7 DLL

• Download: You must download the snap7.dll from SourceForge.
• Configuration: After downloading, place the snap7.dll in a directory that is accessible in your system's PATH. This ensures that EasyS7Comm can locate it during execution.

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Installation

Clone the repository and install the dependencies.

# Clone the repository
git clone https://github.com/your-username/easys7comm.git
cd easys7comm

Note: If EasyS7Comm becomes available on PyPI in the future, installation might be as simple as using pip install easys7comm.

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How to Use

Below is an example demonstrating how to use EasyS7Comm for reading and writing operations with a PLC.

# examples/basic_usage.py
from easys7comm import PLC, DataType

def main():
    try:
        # Create a PLC instance with the specified IP address
        plc = PLC("192.168.0.2")
        
        # Write the string "Allan" to the PLC variable
        plc.write("DB20.DBX12.0", "Allan", DataType.STRING)
        
        # Read and print the value from the variable
        print(plc.read("DB20.DBX12.0", DataType.STRING))
        
        # Check and print if the connection is active
        print(plc.get_connected())
        
    except Exception as e:
        print("An error occurred:", e)
        
    finally:
        # Close the connection with the PLC
        plc.close()

Tip: Ensure your PLC is properly configured and your network connection is stable to avoid connection issues.