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

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Note

The documentation on the following pages 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 or 32-bit AMD 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 packages.

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

    • CODESYS Virtual Safe Control SL

    • CODESYS Control for Linux SL

    • CODESYS Edge Gateway for Linux SL

Linux Host PC

In order for the Safe PLC to be installed on the Linux Host PC, a 32-bit AMD architecture is required on the device. This 32-bit architecture can also be set up on a 64-bit device.

To do this, run the following commands on the command line, using sudo if necessary.

sudo dpkg --add-architecture i386
sudo apt-get install libc6:i386

This prepares the Linux Host PC for the Safe PLC. The Safe PLC can now be installed via the programming system like other products. To do this, proceed as follows:

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

    • CODESYS Safe Control SL

    • CODESYS Control for Linux SL

    • CODESYS Edge Gateway for Linux

    For more information, see the following: Installing Packages

  3. Configuration of 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. Configure the time provider.

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

    Target IP address

    [IP or host name of the Linux Host PC]

    Explanation

    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

Linux Host PC 2

On the 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. Execute the Tools → Deploy Control SL command and establish a connection to the 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.

    Target IP address

    IP address or host name of the Linux Host PC

    Port

    6000

    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.

  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.

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