iolink¶
IO-Link is a standardized point-to-point connection down at the edge layer of the factory automation pyramid.
The iolink Python package allows access to IO-Link devices from within Python, by providing a common abstraction layer to different IO-Link adapters.
Note that for now, only the iqLink® device is supported and only under Windows.
The following example prints the product name of a connected device, by reading out the standard ISDU parameter 0x12.
import iolink
# create a port instance
with iolink.get_port(interface='iqLink') as port:
# change state of the connected device to "Operate"
port.change_device_state_to('Operate')
# read standard ISDU
isdu_0x12_data = port.read_device_isdu(0x12, 0)
# convert the received bytes object that's supposed
# to be an ASCII string to a standard Python 3 string
# and print the result
print(f'Product Name: {isdu_0x12_data.decode("utf8")}')
Trademarks¶
IO-Link is a registered trademark of Profibus User Organization (PNO)