clickplc

clickplc

Python ≥3.8 driver and command-line tool for Koyo Ethernet ClickPLCs.

Installation

pip install clickplc

Usage

Command Line

$ clickplc the-plc-ip-address

This will print all the X, Y, DS, and DF registers to stdout as JSON. You can pipe this as needed. However, you'll likely want the python functionality below.

Python

This uses Python ≥3.5's async/await syntax to asynchronously communicate with a ClickPLC. For example:

import asyncio
from clickplc import ClickPLC

async def get():
    async with ClickPLC('the-plc-ip-address') as plc:
        print(await plc.get('df1-df500'))

asyncio.run(get())

The entire API is get and set, and takes a range of inputs:

>>> await plc.get('df1')
0.0
>>> await plc.get('df1-df20')
{'df1': 0.0, 'df2': 0.0, ..., 'df20': 0.0}
>>> await plc.get('y101-y316')
{'y101': False, 'y102': False, ..., 'y316': False}

>>> await plc.set('df1', 0.0)  # Sets DF1 to 0.0
>>> await plc.set('df1', [0.0, 0.0, 0.0])  # Sets DF1-DF3 to 0.0.
>>> await plc.set('y101', True)  # Sets Y101 to true

Currently, the following datatypes are supported:

x	bool	Input point
y	bool	Output point
c	bool	(C)ontrol relay
t	bool	(T)imer
ct	bool	(C)oun(t)er
ds	int16	(D)ata register, (s)ingle signed int
dd	int32	(D)ata register, (d)double signed int
dh	uint16	(D) register, (h)ex
df	float	(D)ata register, (f)loating point
td	int16	(T)ime (d)elay register
ctd	int32	(C)oun(t)er Current Values, (d)ouble int
sd	int16	(S)ystem (D)ata register

Tags / Nicknames

Recent ClickPLC software provides the ability to export a "tags file", which contains all variables with user-assigned nicknames. The tags file can be used with this driver to improve code readability. (Who really wants to think about modbus addresses and register/coil types?)

To export a tags file, open the ClickPLC software, go to the Address Picker, select "Display MODBUS address", and export the file.

Once you have this file, simply pass the file path to the driver. You can now set variables by name and get all named variables by default.

async with ClickPLC('the-plc-ip-address', 'path-to-tags.csv') as plc:
    await plc.set('my-nickname', True)  # Set variable by nickname
    print(await plc.get())  # Get all named variables in tags file

Additionally, the tags file can be used with the commandline tool to provide more informative output:

$ clickplc the-plc-ip-address tags-filepath