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"The Native Safe House" Scenario: PLC + Safe + PROFIsafe + Time Provider

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Note

The documentation in the following sections is provided for informational purposes only. For restrictions as well as safety or certification information, please consult the safety documentation of the manufacturer of the device that you are programming.

Requirements

  • Hardware

    The following devices are required:

    • Desktop PC with CODESYS Development System installed

    • Linux Host PC with 64-bit AMD or ARM architecture

    The following additional devices are also required:

    • Host for the safe time provider (named Linux Host PC 2 in the diagram). Requirements for this host: Linux operating system with SSH server.

    • Real-time capable network to the Linux Host PC to ensure deterministic transmission of data packets.

  • The following add-on products must be installed on the desktop PC:

    • CODESYS Safe Control SL

    • CODESYS Control for Linux SL

    • CODESYS Edge Gateway for Linux SL

Linux Host PC

  1. Execute the Tools → Deploy Control SL command and establish a connection to the Linux Host PC (Communication tab).

    For more information, see the following: Establishing a Connection

  2. On the Deployment tab, install the newest versions of the following products:

    • CODESYS Safe Control SL

    • CODESYS Control for Linux SL

    • CODESYS Edge Gateway for Linux

    For more information, see the following: Installing Packages.

  3. Configure the CODESYS Safe Control SL

    The standard configuration of the CODESYS Safe Control SL should initially be usable for most applications.

    You can adjust the following parameters to suit your needs:

    Parameter

    Default Value

    Explanation

    Application priority

    35

    Runtime system priority (not Linux or IEC priority) for the application task

    CPU

    0

    Pin the CmpSIL3 tasks to the specified core

    External time task priority

    9

    Runtime system priority (not Linux or IEC priority) for the external time task

    Port

    60000

    UDP port used for the external Time Provider

  4. Perform any necessary Ethernet performance optimizations.

    For more information, see the following: Ethernet/Fieldbus Performance

Linux Host PC 2

On Linux Host PC 2, set up the time provider.

The time provider sends the current time to a configured destination and can be used to provide the second time required by the CODESYS Safe Control SL.

  1. Run the Tools → Deploy Control SL command and establish a connection to Linux Host PC 2 (Communication tab).

    For more information, see the following: Establishing a Connection

  2. Install the newest versions of the following products (Deployment tab):

    • CODESYS Safe Time Provider SL

    For more information, see the following: Installing an image

  3. Switch to the Operation tab and select the CODESYS Safe Time Provider SL under Services.

  4. Stop the time provider so you can configure it.

  5. Configure the time provider.

    The target IP address and the target port must be configured. The target is the Linux Host PC.

    Parameter

    Value

    Explanation

    Target IP address

    [IP or host name of the Linux Host PC]

    Port

    60000

    Port 60000 is the default for a CODESYS Safe Control SL to receive an external time source from the timer.

    Other parameters are also configurable and can be adapted to your needs.

    Parameter

    Default Value

    Explanation

    Output interval

    60

    Output interval (in seconds) of the statistics of the time provider

    CPU

    0

    Core where the time provider should be executed

    Debug output

    FALSE

    Enable or disable the debug output

    Enable logging

    FALSE

    Enable or disable writing log output to syslog

    Priority

    55

    SCHED_FIFO scheduling priority

    Redundancy enabled

    FALSE

    Enable or disable the redundancy function of the Time Provider. (Requires an additional CODESYS Safe Time Provider)

    Cycle time

    3

    The interval in which the Time Provider sends the timestamp packages

  6. Click the Save button to accept the changes.

  7. Start the time provider.

All the required devices are now ready. You can now download your applications to the controllers. The next steps for creating a project and integrating PROFIsafe are described in the CODESYS Safety Extension documentation.

In this section: