Configuring PROFINET

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Restrictions for Configuring PROFINET

The switch does not support isochronous real-time communication channels.

Information About Configuring PROFINET

PROFINET is the PROFIBUS International (PI) open Industrial Ethernet Standard that uses TCP/IP and IT standards for automation control. PROFINET is particularly useful for industrial automation systems and process control networks, in which motion control and precision control of instrumentation and test equipment are important. It emphasizes data exchange and defines communication paths to meet speed requirements. PROFINET communication is scalable on three levels:

  • Normal non-real-time communication uses TCP/IP and enables bus cycle times of approximately 100 ms.
  • Real-time communication enables cycle times of approximately 10 ms.
  • Isochronous real-time communication enables cycle times of approximately 1 ms.

PROFINET I/O is a modular communication framework for distributed automation applications. PROFINET I/O uses cyclic data transfer to exchange data, alarms, and diagnostic information with programmable controllers, input/output (I/O) devices, and other automation controllers (for example, motion controllers).

PROFINET I/O recognizes three classes of devices:

  • I/O devices
  • I/O controllers
  • I/O supervisors

PROFINET Device Roles

Figure 9-1 PROFINET Device Roles

 

An I/O controller is a programmable logic controller (PLC) that controls I/O devices and exchanges data such as configuration, alarms, and I/O data through an automation program. The I/O controller and the I/O supervisor exchange diagnostic information. The I/O controller shares configuration and input/output information with the I/O device and receives alarms from the I/O device.

PROFINET is designed to be the sole or primary management system platform. Because the I/O controller detects the switch with the Discovery and Configuration Protocol (DCP), and sets the device name and IP address, you do not need to enter Cisco IOS commands for the basic configuration. For advanced configurations (for example, QoS, DHCP, and similar features) you must use Cisco IOS commands on the switch because these features cannot be configured by using PROFINET.

An I/O supervisor is an engineering station, such as a human machine interface (HMI) or PC, used for commissioning, monitoring, and diagnostic analysis. The I/O supervisor exchanges diagnostic, status, control, and parameter information with the I/O device.

An I/O device is a distributed input/output device such as a sensor, an actuator, or a motion controller.


Note The switch acts as an I/O device, providing a PROFINET management connection to the I/O controllers.


In a PROFINET I/O system, all the I/O devices communicate over an Ethernet communication network to meet the automation industry requirement for bus cycle times of less than 100 ms. The network uses switches and full-duplex data exchange to avoid data collisions.

PROFINET Device Data Exchange

After PROFINET uses DCP to discover devices, including the switch, they establish application relationships (ARs) and communication relationships (CRs). After a connection is established and information about device parameters is exchanged, input and output data is exchanged. The switch uses non-real-time CRs to exchange the data attributes listed in Table 9-1 and Table 9-2 .

 

Table 9-1 PROFINET I/O Switch Attributes

PROFINET I/O Switch Configuration Attributes
Value or Action

Device name

Configures a name for the device.

TCP/IP

IP address, subnet mask, default gateway, SVI.

Primary temperature alarm

Enables or disables monitoring for the specified alarm.

Secondary temperature alarm

Enables or disables monitoring for the specified alarm.

RPS failed alarm

Enables or disables monitoring for the specified alarm.

Relay major alarm

Enables or disables monitoring for the specified alarm.

Reset to factory defaults

Uses the PROFINET I/O controller to reset the switch to factory defaults. This action removes the startup configuration and reloads the switch.

Relay major configuration

Specifies the type of port alarm (for example, link fault) that triggers the major relay. Any port configured with the specified alarm type can trigger the major relay.

 

Table 9-2 PROFINET I/O Port Attributes

PROFINET I/O Port Configuration Attributes
Value or Action

Speed

10/100/1000/auto,

Duplex

Half/full/auto,

Port mode

Access/trunk,

Link status

Shut down/no shut down,

Configure rate limiting

Broadcast, unicast, multicast threshold exceeds configured levels.

Port link fault alarm

Enables or disables monitoring for specified alarm.

Port not forwarding alarm

Enables or disables monitoring for specified alarm.

Port not operating alarm

Enables or disables monitoring for specified alarm.

Port FCS threshold alarm

Enables or disables monitoring for specified alarm.

PROFINET devices are integrated by using a general station description (GSD) file that contains the data for engineering and data exchange between the I/O controller, the I/O supervisor, and the I/O devices, including the switch. Each PROFINET I/O field device must have an associated GSD file that describes the properties of the device and contains all this information required for configuration:

  • Device identification information (device ID, vendor ID and name, product family, number of ports)
  • Number and types of pluggable modules
  • The Cisco IE 2000 8-port expander modules are not hot-swappable. Turn off the switch before connecting or disconnecting expander modules.
  • Error text for diagnostic information
  • Communication parameters for I/O devices, including the minimum cycle time, the reduction ratio, and the watch dog time

Note Although the Cisco IE 2000 switch has a default reduction ratio of 128 ms, we recommend a reduction ratio of 256 ms or 512 ms to reduce the load on the switch CPU when the switch uses a complex configuration.


  • Configuration data for the I/O device modules, including speed, duplex, VLAN, port security information, alarms, and broadcast-rate-limiting thresholds
  • Parameters configured for I/O device modules for the attributes listed in Table 9-2

The GSD file is on the switch, but the I/O supervisor uses this file.


Note You must use the GSD file that is associated with the Cisco IOS release on the switch to manage your PROFINET network. Both the I/O supervisor and the Cisco IOS software alert you to a mismatch between the GSD file and the switch Cisco IOS software version.


How to Configure PROFINET

Configuring PROFINET

You can use either the PROFINET software on the I/O supervisor or the Cisco IOS software for basic switch configuration.

Default Configuration

PROFINET is enabled by default on all the base switch module and expansion-unit Ethernet ports. If PROFINET has been disabled, follow the instructions in the “Enabling PROFINET” section.

Enabling PROFINET

 

Command
Purpose

Step 1

configure terminal

Enters global configuration mode.

Step 2

profinet

Enables PROFINET on the switch.

Step 3

profinet id line

(Optional) Sets the PROFINET device identifier (ID) by using the Cisco IOS software.

The maximum length is 240 characters. The only special characters allowed are the period (.) and hyphen (-), and they are allowed only in specific positions within the ID string. It can have multiple labels within the string. Each label can be from 1 to 63 characters, and labels must be separated by a period (.). The final character in the string must not be zero (0).

For more details about configuring the PROFINET ID, see the PROFINET specification, document number TC2-06-0007a, filename PN-AL-protocol_2722_V22_Oct07, available from PROFIBUS.

Step 4

profinet vlan vlan id

(Optional) Changes the VLAN number. The default VLAN number is 1. The VLAN ID range is 1-4096.

Step 5

end

Returns to privileged EXEC mode.

Step 6

show running-config

Verifies your entries.

Step 7

copy running-config startup-config

(Optional) Saves your entries in the configuration file.

Monitoring and Maintaining PROFINET

 

Table 9-3 Commands for Displaying the PROFINET Configuration

Command
Purpose

show profinet sessions

Displays the currently connected PROFINET sessions.

show profinet status

Displays the status of the PROFINET subsystem.

Troubleshooting PROFINET

The PLC has LEDs that display red for alarms, and the I/O supervisor software monitors those alarms.

To troubleshoot PROFINET use the debug profinet privileged EXEC command with the keywords shown in Commands for Troubleshooting the PROFINET Configuration Table 9-4 . Be aware that the output of a debug command might cause a serial link to fail. You should use these commands only under the guidance of a Cisco Technical Support engineer. When you use this command, use Telnet to access the Cisco IOS command-line interface (CLI) by using Ethernet rather than a serial port.

 

Table 9-4 Commands for Troubleshooting the PROFINET Configuration

Command
Purpose

debug profinet alarm

Displays the alarm status (on or off) and content of PROFINET alarms.

debug profinet cyclic

Displays information about the time-cycle-based PROFINET Ethernet frames.

debug profinet error

Displays the PROFINET session errors.

debug profinet packet ethernet

Displays information about the PROFINET Ethernet packets.

debug profinet packet udp

Displays information about the PROFINET Upper Layer Data Protocol (UDP) packets.

debug profinet platform

Displays information about the interaction between the Cisco IOS software and PROFINET.

debug profinet topology

Displays the PROFINET topology packets received.

debug profinet trace

Displays a group of traced debug output logs.

Additional References

The following sections provide references related to switch administration:

Related Documents

Related Topic
Document Title

Cisco IE 2000 commands

Cisco IE 2000 Switch Command Reference, Release 15.0(1)EY

Cisco IOS basic commands

Cisco IOS Configuration Fundamentals Command Reference

Standards

Standards
Title

No new or modified standards are supported by this feature, and support for existing standards has not been modified by this feature.

MIBs

MIBs
MIBs Link

To locate and download MIBs using Cisco IOS XR software, use the Cisco MIB Locator found at the following URL and choose a platform under the Cisco Access Products menu: http://cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml

RFCs

RFCs
Title

No new or modified RFCs are supported by this feature, and support for existing RFCs has not been modified by this feature.

Technical Assistance

Description
Link

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http://www.cisco.com/techsupport