https://github.com/ruscito/pycomm

pycomm is a package that includes a collection of modules used to communicate with PLCs
https://github.com/ruscito/pycomm

automation ethernet-ip plc python rockwell

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pycomm is a package that includes a collection of modules used to communicate with PLCs

• Host: GitHub
• URL: https://github.com/ruscito/pycomm
• Owner: ruscito
• License: mit
• Created: 2014-12-22T16:20:17.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2019-09-07T03:54:36.000Z (almost 5 years ago)
• Last Synced: 2024-03-20T05:05:10.181Z (3 months ago)
• Topics: automation, ethernet-ip, plc, python, rockwell
• Language: Python
• Homepage:
• Size: 197 KB
• Stars: 140
• Watchers: 34
• Forks: 84
• Open Issues: 29
• Metadata Files:
  • Readme: README.rst
  • Changelog: CHANGES
  • License: LICENSE

Lists

• awesome-mechtools - pycomm

README

        
pycomm

======

pycomm is a package that includes a collection of modules used to communicate with PLCs.

At the moment the first module in the package is ab_comm.

Test

~~~~

The library is currently test on Python 2.6, 2.7.

.. image:: https://travis-ci.org/ruscito/pycomm.svg?branch=master

    :target: https://travis-ci.org/ruscito/pycomm

Setup

~~~~~

The package can be installed from

GitHub:

::

    git clone https://github.com/ruscito/pycomm.git

    cd pycomm

    sudo python setup.py install

PyPi:

::

    pip install pycomm

ab_comm

~~~~~~~

ab_comm is a module that contains a set of classes used to interface Rockwell PLCs using Ethernet/IP protocol.

The "clx" class can be used to communicate with Compactlogix, Controllogix PLCs

The "slc" can be used to communicate with Micrologix or SLC PLCs

I tried to followCIP specifications volume 1 and 2 as well as `Rockwell Automation Publication 1756-PM020-EN-P - November 2012`_ .

.. _Rockwell Automation Publication 1756-PM020-EN-P - November 2012: http://literature.rockwellautomation.com/idc/groups/literature/documents/pm/1756-pm020_-en-p.pdf

See the following snippet for communication with a Controllogix PLC:

::

    from pycomm.ab_comm.clx import Driver as ClxDriver

    import logging

    if __name__ == '__main__':

        logging.basicConfig(

            filename="ClxDriver.log",

            format="%(levelname)-10s %(asctime)s %(message)s",

            level=logging.DEBUG

        )

        c = ClxDriver()

        if c.open('172.16.2.161'):

            print(c.read_tag(['ControlWord']))

            print(c.read_tag(['parts', 'ControlWord', 'Counts']))

            print(c.write_tag('Counts', -26, 'INT'))

            print(c.write_tag(('Counts', 26, 'INT')))

            print(c.write_tag([('Counts', 26, 'INT')]))

            print(c.write_tag([('Counts', -26, 'INT'), ('ControlWord', -30, 'DINT'), ('parts', 31, 'DINT')]))

            # To read an array

            r_array = c.read_array("TotalCount", 1750)

            for tag in r_array:

                print (tag)

            # To read string

            c.write_string('TEMP_STRING', 'my_value')

            c.read_string('TEMP_STRING')

            # reset tha array to all 0

            w_array = []

            for i in xrange(1750):

                w_array.append(0)

            c.write_array("TotalCount", w_array, "SINT")

            c.close()

See the following snippet for communication with a  Micrologix PLC:

::

    from pycomm.ab_comm.slc import Driver as SlcDriver

    import logging

    if __name__ == '__main__':

        logging.basicConfig(

            filename="SlcDriver.log",

            format="%(levelname)-10s %(asctime)s %(message)s",

            level=logging.DEBUG

        )

        c = SlcDriver()

        if c.open('172.16.2.160'):

            print c.read_tag('S:1/5')

            print c.read_tag('S:60', 2)

            print c.write_tag('N7:0', [-30, 32767, -32767])

            print c.write_tag('N7:0', 21)

            print c.read_tag('N7:0', 10)

            print c.write_tag('F8:0', [3.1, 4.95, -32.89])

            print c.write_tag('F8:0', 21)

            print c.read_tag('F8:0', 3)

            print c.write_tag('B3:100', [23, -1, 4, 9])

            print c.write_tag('B3:100', 21)

            print c.read_tag('B3:100', 4)

            print c.write_tag('T4:3.PRE', 431)

            print c.read_tag('T4:3.PRE')

            print c.write_tag('C5:0.PRE', 501)

            print c.read_tag('C5:0.PRE')

            print c.write_tag('T4:3.ACC', 432)

            print c.read_tag('T4:3.ACC')

            print c.write_tag('C5:0.ACC', 502)

            print c.read_tag('C5:0.ACC')

            c.write_tag('T4:2.EN', 0)

            c.write_tag('T4:2.TT', 0)

            c.write_tag('T4:2.DN', 0)

            print c.read_tag('T4:2.EN', 1)

            print c.read_tag('T4:2.TT', 1)

            print c.read_tag('T4:2.DN',)

            c.write_tag('C5:0.CU', 1)

            c.write_tag('C5:0.CD', 0)

            c.write_tag('C5:0.DN', 1)

            c.write_tag('C5:0.OV', 0)

            c.write_tag('C5:0.UN', 1)

            c.write_tag('C5:0.UA', 0)

            print c.read_tag('C5:0.CU')

            print c.read_tag('C5:0.CD')

            print c.read_tag('C5:0.DN')

            print c.read_tag('C5:0.OV')

            print c.read_tag('C5:0.UN')

            print c.read_tag('C5:0.UA')

            c.write_tag('B3:100', 1)

            print c.read_tag('B3:100')

            c.write_tag('B3/3955', 1)

            print c.read_tag('B3/3955')

            c.write_tag('N7:0/2', 1)

            print c.read_tag('N7:0/2')

            print c.write_tag('O:0.0/4', 1)

            print c.read_tag('O:0.0/4')

        c.close()

The Future

~~~~~~~~~~

This package is under development.

The modules _ab_comm.clx_ and _ab_comm.slc_ are completed at  moment but other drivers will be added in the future.

Thanks

~~~~~~

Thanks to patrickjmcd_ for the help with the Direct Connections and thanks in advance to anyone for feedback and suggestions.

.. _patrickjmcd: https://github.com/patrickjmcd

License

~~~~~~~

pycomm is distributed under the MIT License