STMicroelectronics P-NUCLEO-IOM01M1 User Manual

UM2421

User manual

Getting started with the P-NUCLEO-IOM01M1 full IO-Link master (PHY plus stack) evaluation board and development system

Introduction

The P-NUCLEO-IOM01M1 is an STM32 Nucleo pack composed of the STEVAL-IOM001V1 and the NUCLEO-F446RE boards. The STEVAL-IOM001V1 is a single IO-Link master PHY layer (L6360) while the NUCLEOF446RE runs an IO-Link stack v.1.1 (developed by and property of TEConcept GmbH, license limited to 10k minutes, renewable without additional costs). IO-Link stack update is allowed exclusively by following the procedure described in Section 5 Firmware update. Any other erase/ overwrite of the pre-loaded stack makes impossible to restore it.

The STM32 Nucleo pack provides an affordable and easy-to-use solution for the evaluation of IO-Link applications, L6360 communication features and robustness, together with the STM32F446RET6 computation performance. The pack, hosting up to four STEVAL-IOM001V1 to build a quad port IO-Link master, can access the IO-Link physical layer and communicate with IOLink Devices.

You can evaluate the tool via the dedicated GUI (IO-Link Control Tool©, property of TEConcept GmbH) or use it as an IO-Link master bridge accessible from the dedicated SPI interface: source code of demo project (Low-Level IO-Link Master Access Demo Application, developed by TEConcept GmbH) and API specification are available for free.

Figure 1. P-NUCLEO-IOM01M1 evaluation pack

UM2421 - Rev 5 - October 2020	www.st.com
For further information contact your local STMicroelectronics sales office.

UM2421

Architecture overview

1Architecture overview

A generic IO-Link system is composed of an IO-Link master and an IO-Link device connected by an unshielded cable. Normally, the IO-Link master is the connection point between the IO-Link device and the automation system.

The IO-Link master is installed in the control cabinet or, as a remote I/O, directly in the field. It can have several IO-Link ports (channels): an IO-Link device can be connected to each port, hence, it is a point-to-point communication and not a fieldbus.

A single port master, as the P-NUCLEO-IOM01M1, can be schematized as the arrangement of two main blocks (see Figure 2. P-NUCLEO-IOM01M1 block details):

•Control sub-system: the NUCLEO-F446RE board runs the IO-Link stack and firmware accepting user commands, configuration parameters and controlling the remote IO-Link device. The NUCLEO-F446RE board provides all digital signals to perform the proper control for single and multi-port (up to 4) IO-Link master. You can evaluate the tool via the dedicated GUI (IO-Link Control Tool by TeConcept®) or use it as an IO-Link master bridge accessible from the dedicated SPI interface.

•IO-Link physical: the STEVAL-IOM001V1 mounts the ST transceiver L6360, which interfaces with the micro-controller by digital interfaces (I²C for status and configuration; UART for IO-Link data transfer) and the IO-Link device by the IO-Link interface (type A or type B as defined by the standard).

Figure 2. P-NUCLEO-IOM01M1 block details

UM2421 - Rev 5	page 2/19

UM2421

Getting started

2Getting started

2.1Hardware requirements

To evaluate the system, the hardware requirements are:

•a P-NUCLEO-IOM01M1 (STEVAL-IOM001V1 plus NUCLEO-F446RE)

•a power supply (18-32.5 V)

•a USB cable (type A to mini-B)

•an IO-Link (v1.1) device (e.g. P-NUCLEO-IOD01A1)

•connection cable/wires between IO-Link master and IO-Link device

•a Laptop/PC

The P-NUCLEO-IOM01M1 is a complete single port IO-Link master composed by two application boards (STEVAL-IOM001V1 and NUCLEO-F446RE) connected via the CN7 and CN10 ST morpho connectors.

A power supply (from 18 to 32.5 V) is necessary to supply the STEVAL-IOM001V1 via the CN1 connector, whereas the NUCLEO-F446RE can be supplied by connecting its mini-USB port to your PC/Laptop USB port through a USB type A to mini-B USB cable.

For a full evaluation of the system, an IO-Link device compatible with specification v1.1 (for example, P-NUCLEO- IOD01A1) is also necessary.

The IO-Link master can be controlled by the IO-Link Control Tool (through USB) of TEConcept, or by the SPI interface available on CN7: in this case, a SPI master (for example, another STM32 Nucleo board programmed with Low-Level IO-Link Master Access Demo Application) and the connection wires for SPI signals are necessary (see also Section 3.3 Development system setup).

2.2Software requirements

To complete the system, you need a PC/laptop with:

•Windows®(version 7 or above)

•STSW-LINK009 driver installed

For system evaluation only:

•IO-Link Control Tool©(property of TEConcept GmbH)

•the IODD file of your IO-Link device

For application development:

• the SPI master control software (Low-Level IO-Link Master Access Demo Application)

2.2.1Low-Level IO-Link Master Access Demo

The Low-Level IO-Link Master Access Demo application is an example of how to build host application for controlling the IO-Link. It provides low-level functions which make possible basic communication with IO-Link master (for example, to change the IO-Link port configuration, to read or write parameters, etc.).

The Low-Level IO-Link Master Access module has its own abstraction layers that run on different platforms (such as Windows, Linux, Cortex-M) and provides different peripherals for the connection with the IO-Link master (such as SPI, USB Virtual COM port, UART232, etc.).

For details on the control of the IO-Link master from your host application running on an embedded environment, refer to Figure 9. P-NUCLEO-IOM01M1 development system connections.

UM2421 - Rev 5	page 3/19

UM2421

How to build and run the IO-Link master

3How to build and run the IO-Link master

3.1Single port system evaluation setup

Step 1. Connect the STEVAL-IOM001V1 evaluation board to the NUCLEO-F446RE board through the ST morpho connectors.

Important:

The STEVAL-IOM001V1 evaluation board must be on the opposite side with respect to the NUCLEO-F446RE board mini-USB connector, as shown in the figure below.

Figure 3. STEVAL-IOM001V1 connected to NUCLEO-F446RE (P-NUCLEO-IOM01M1 stack)

UM2421 - Rev 5	page 4/19

UM2421

Single port system evaluation setup

Step 2. Connect the STEVAL-IOM001V1 to the IO-Link device by screwing cables on CN3, taking care of the pin/signal correspondence.

Figure 4. P-NUCLEO-IOM01M1 evaluation system connections

Step 3. Launch the IO-Link Control Tool (CT) on your laptop/PC.

Step 4. Connect the USB cable between the laptop/PC USB port and the P-NUCLEO-IOM01M1 mini-USB port.

Step 5. Click on the Control Tool [Connect] button (green icon).

Figure 5. IO-Link Control Tool interface

Step 6. Connect the power supply to the STEVAL-IOM001V1 CN1 connector, taking care of the polarity (refer to Figure 4. P-NUCLEO-IOM01M1 evaluation system connections).

UM2421 - Rev 5	page 5/19

UM2421

Single port system evaluation setup

Step 7. Activate the power supply connected to the STEVAL-IOM001V1.

Step 8. Reset the STEVAL-IOM001V1 by clicking the [reset] button.

Step 9. Reset the NUCLEO-F446RE by clicking the [black] button.

The system is now ready to operate and can be controlled by the IO-Link Control Tool.

Step 10. Click on [Inactive] to stop previous data exchange (refer to Figure 5. IO-Link Control Tool interface).

Step 11. Select [Port 1] tab and click on [Power OFF]: this action drives low the ENL+ signal and L+ line. CN3 does not supply the IO-Link device anymore (refer to Figure 5. IO-Link Control Tool interface).

Step 12. Click on [Select Device]: the Device selector window appears.

Figure 6. IO-Link Control Tool - IODD selection

Step 13. Select the IODD XML file of your IO-Link device from the list and click [Select Device]. The Device selector is then closed.

If the IODD files does not appear in the list, click [Import], browse your folders and then click [Open] to add the XML file of your IO-Link Device to the list of the Device Selector window.

Step 14. Click on [Power On] (ENL+ is turned ON and the IO-Link device is supplied by L+ line).

Step 15. Click on [IO-Link] to activate the wake-up request and establish communication with the IO-Link device. The Device Status window shows the connection status (see Figure 7. IO-Link Control Tool - sensor and data format activators)

Step 16. In the Parameter tab, open the Identification menu and double click on the right side of the Sensor Activator “var”: a selection window opens to select the sensor to be activated.

If the P-NUCLEO-IOD01A1 is connected, select [All sensors are enabled (30)] and click anywhere outside the window.

Step 17. Click on the [Sensor Activator] row and then click on the [Write Selected] button to definitively activate the selection.

Step 18. In the Parameter tab, double click on the right side of the Process Data Layout “var”: a selection window is open.

Step 19. Select the desired data to display (e.g. “Temperature + Humidity (7)”, if P-NUCLEO-IOD01A1 is used) and then click anywhere outside the window.

UM2421 - Rev 5	page 6/19