cpppo | Communications Protocol Python Parser and Originator | Networking library
kandi X-RAY | cpppo Summary
kandi X-RAY | cpppo Summary
Communications Protocol Python Parser and Originator -- EtherNet/IP CIP
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Top functions reviewed by kandi - BETA
- Load the history .
- Main entry point .
- Generate read details .
- Support timestamps .
- Make an API request .
- Opens the history file .
- Issue requests .
- Sends a TCP TCP packet to the network .
- Start the server .
- Run the generator until the source is reached .
cpppo Key Features
cpppo Examples and Code Snippets
Lines of Code : 14License : Strong Copyleft (CC BY-SA 4.0)
Copywhile True:
try:
for message in source.read(TagName): # Note that this connection might be broken after the error.
val = message[0]
timestr = str(datetime.now())
if val != prev:
while True:
x, = proxy_simple(host).read("")
with open(CsvFile,"a",newline='') as file:
for val in x:
# ...
forever:
create proxy
open output file
process values from proxy
from cpppo.server.enip.get_attribute import proxy_simple
import time
host = "IPHERE"
while True:
x, = proxy_simple(host).read(( "CPID"))
print x
time.sleep(5)
from cpppo.server.enip.get_attribute import proxy_simple
via = proxy_simple('192.168.100.11')
with via:
result, = via.read([('@0x7F/1/1=(SINT)1','@0x7F/1/1')],1)
Community Discussions
Trending Discussions on cpppo
QUESTION
I am trying to communicate with an Allen Bradley L16ER PLC via python. What I've found online says that I should use either CPPPO or pycomm modules to accomplish this. I have looked for a good source of documentation for these, and was unable to find one. Is there a good place to find an explanation of the basics of how to use either of these? Also, is there an alternative solution that may work better?
To further define my problem, let's define understanding of using this module into three layers.
- Understanding Python.
- Understanding how PLCs communicate.
- Understanding how to use these modules.
While I understand level 1, I don't understand level 2. This makes it very hard to understand level 3.
...ANSWER
Answered 2018-Jun-28 at 12:49You can look at pylogix, it has some example code for it:
QUESTION
I want to communicate with a PLC (specifically the Productivity 2000) using python. I have found cpppo and pycomm; the problem is that these are made for python2. What is my best alternative that can be used in python3?
...ANSWER
Answered 2018-Jul-19 at 05:08The latest CPPPO library supports Python 3.
https://github.com/pjkundert/cpppo
The Productivity 2000 PLC also supports Modbus TCP. There are several python libraries for this protocol as well.
https://github.com/sourceperl/pyModbusTCP https://github.com/riptideio/pymodbus
QUESTION
I posted the correlated question Is there a method to help make this Python logic run faster a few days ago and I've extended on this logic for my testing needs after getting a confirmed solution.
For some reason I cannot figure out how to tell this Python as it's running if it gets an AssertionError to print out Assertion Error and then continue back with the logic again.
ANSWER
Answered 2018-Apr-19 at 16:38The AssertionError occured in the source.read(TagName) call. you need to wrap this with your try except block:
QUESTION
I've been working on a solution to grab data from a PLC sensor with Python and I was able to work out the syntax and such using cpppo and that is working just fine as far as getting the data from the tag in a loop in a presumed serialized manner.
To test this new Python cpppo solution I've connected the machine that runs the Python logic to a PLC via a VPN tunnel and I have it poll a specific tag/sensor. This tag is also polled and recorded with a different non-Python solution that is connected to the local machine network via Ethernet.
QuestionDoes anyone know a way I could potentially re-write this simply code below in a manner that I could force it to poll 3 or even 4 times in a second? Anything else that could be contributing to this?
- By contributing to "this", I am talking about the "other" or "non-Python" method seems to record poll responses from this same tag 3 times in a second and the Python cpppo solution only seems poll records at a max of 2 times per second and thus missing a weight every now and then when there are 3 weight values in one second—sometimes there are only 2 per second so it's not always 3 values in a second but there are 3 in a second sometimes.
The sensor data is returned enclosed in square brackets but represents weight in grams with decimal precision and below is a small sample of the raw data.
...ANSWER
Answered 2018-Apr-14 at 03:15The key part of your code is:
QUESTION
I am trying to move data (a dint specifically but my example is a BOOL) from the plc to python to be used as a variable to display a picture. The issue is, if I use pycomm, I am getting an error in Windows Powershell. I feel this is a very simple error from a basic python mistake rather than a pycomm issue but I am not informed enough to tell.
SysInfo:
...ANSWER
Answered 2017-Jul-27 at 19:03I was able to read a value, but not with pycomm. Using CPPPO, I was able to continuously update a variable as needed. This may not answer the question of what was wrong with my old code, but it is my work around in case someone from the future has to do the same thing. Credit to user Liverpool_chris and the abyss of Reddit.
https://www.reddit.com/r/PLC/comments/5x3y5z/python_cpppo_library_writing_to_tag_in_plc/
QUESTION
My question will be about Cpppo and EtherNET/IP. I have installed the library Cpppo via pip and trying to set single value in certain class, but i'm doing something wrong, cause every time I am getting "NONE". My test code is:
...ANSWER
Answered 2017-Apr-06 at 15:21After one day and a half I found right way how to write single attribute in certain class using Cpppo library. I hope, that my solution will helps to someone. This code works with my hardware in right way:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install cpppo
You can use cpppo like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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