IO-Link Device Description, the electronic description of the device characteristics: The IODD file provides information for integration into the system e.g. identification, process, and diagnostic data.
The IODD for every IO-Link product is available on ifm's website under "Documents & downloads → IODD Downloads".
A manufacturer-independent IODD finder is available on the website of the IO-Link community: www.io-link.com or directly at: https://ioddfinder.io-link.com/#/
The IODD is saved in the LR DEVICE parameter setting software or another software for IO-Link device and port configuration tools from ifm provided the IO-Link devices are sold through ifm.
This is a digital value sent from the sensor to the main system.
If a sensor generates a measured value or determines a process value, this can be transmitted digitally to the controller via IO-Link.
There are no conversion, scaling or transmission losses.
The entire measured value transmission is digital. Error-prone transmission and conversion of analogue signals are eliminated. The digitally transmitted measured values can be directly displayed in the control room.
The IO-Link master checks all IO-Link devices within a communication cycle. If a device does not respond, the wire break is immediately detected and signalled irrespective of the measured value.
When using IO-Link the user receives both input and output data via the port of a sensor/actuator device. The typical differentiation of the port as input/output no longer applies.
In standard mode without IO-Link every port of an IO-Link capable device can still be configured as input or output.
Data that goes in both directions; from and to the IO-Link master.
An A port has an integrated, low-current power supply for devices; a B port allows a second isolated supply for outputs.
The IO-Link master connects one or several IO-Link devices to the gateway in higher-level fieldbus systems.
Click here for the selection of IO-Link masters from ifm: https://www.ifm.com/de/en/category/055/055_010
For installations without IO-Link the Memory Plug allows transmission of parameters to replacement units. To do so, it reads and saves the data of a connected IO-Link sensor. The saved parameters can be copied to sensors of the same type with factory setting.
Click here for the IO-Link Memory Plug: https://www.ifm.com/de/en/product/E30398
Every master port must be configured by the user according to the requirements of the user's application: master port mode (DI, DO, IO-Link), process data width and data length. Recommendation: activate the device identification for future compatible replacements.
The LR DEVICE software makes this task easier by scanning the network for available IO-Link masters and connected devices.
Whether a port automatically uploads or downloads depends, on the one hand, on the parameter setting of the IO-Link device and, on the other hand, on the configuration of the master port. The parameter setting of the IO-Link device and the master configuration are carried out using an engineering tool such as LR DEVICE.
The following document describes the integration of process data using the example of ifm pressure and flow sensors.