Configuration - System Services

Available from firmware 2021.6


This WBM page is accessible with user role:

  • Admin
  • SecurityAdmin (from firmware 2022.0 LTS)

How to get into the WBMHow to get into the WBM

Establishing a connection to the Web-based Management (WBM):

  • Open a web browser on your computer.
  • In the address field, enter the URL https://<IP-address-of-the-controller>/wbm,
    for example:

For further information, see WBM.

System Services page

The System Services page provides a status information on the enabled and disabled system services as well as their factory default settings.

Disabling unnecessary system services can be helpful to gain the performance of running programs. 

Before disabling a system service that is enabled by default make sure to know exactly what a service is for in the context of the PLCnext Runtime System. Otherwise, leave it enabled to avoid unwanted side effects.

When activating a Security Profile, most of these system services will become inactive after rebooting.

Note: With changing a setting, the whole System Services settings are overwritten, so settings induced by a PLCnext App will be set back, too. Make sure to leave those settings untouched, or refer to the PLCnext App documentation to re-enable its system services settings.

(Re-)Enabling a system service

If you want to use a System Service that is not active by default in the factory settings, or if you want to re-enable a System Service that has been disabled before:

  • Enable the respective Activation checkbox.
  • Click the Apply and reboot button, and confirm the pop-up warning.

After starting up the PLC, the System Services are active/inactive as indicated in this WBM page.


Disabling a system service

If you want to dispense a System Service that is active by default in the factory settings, or if you want to disable a System Service that has been enabled before:

  • Disable the respective Activation checkbox.
  • Click on the Apply and reboot button, and confirm the pop-up warning.

After starting up the PLC, the System Services are active/inactive as indicated in this WBM page.


Overview to the available system services

Note: Service availability is subject to the device in use.
Service ID Service Name Description
AppManager App Manager Deactivating the App Manager only prevents from accessing the PLCnext Apps page of the Web-based Management while the currently installed and activated apps will be started and executed on the controller.
DATALOGGER Data Logger see DataLogger 
EHMI Embedded HMI see PLCnext Engineer eHMI
ETHERNET IP Ethernet IP see EtherNet/IP™ Slave device
FWM Firewall Manager Deactivating the Firewall Manager only prevents accessing the Firewallpage of the Web-based Management while the current ruleset stays active.
GRPC LOCAL SERVER gRPC Remote Procedure Calls (Local) see Using gRPC communication
IEC Support for IEC 61131 Runtime see IEC programming with PLCnext Engineer
PLCNEXT SYSLOG ADAPTER PLCnext Syslog adapter and Syslog configuration manager If this service is active the notifications of the PLCnext Runtime are pushed to the Linux Syslog. In addition (and independant of activating this PLCnext Syslog Adapter service), the Linux Syslog can be configured to push the (local) Syslog notifications to a Syslog server.
NETLOAD LIMITER Netload Limiter see RSC INetloadLimiterService
OPCUA Embedded OPC UA Server see OPC UA Server
OPCUA CLIENT Embedded OPC UA Client see OPC UA Client 
(service is available from firmware version 2023.0 LTS)
PLCNEXT STORE PLCnext Store Connector see PLCnext Store
PROFICLOUD Proficloud see Proficloud
PROFINET CONTROLLER PROFINET controller see additional notes below and Profinet Diagnostics
SOFTWARE UPDATE Software Update Performing a software update via Proficloud Device Managemant Service (from firmware 2021.0 LTS), via Device and Update Management (from firmware 2022.0 LTS, some devices only), or via OPC UA(from firmware 2022.0 LTS)
TRACING Trace Controller To add your own trace points, see RSC ITraceControllerService.
To analyse complex occurrences of ESM task watchdog, see this Knowledge Base article

Need to know when disabling a PROFINET interface

Different Ethernet interfaces providing PROFINET functions

On devices with more than one Ethernet interface, the PROFINET controller functions and the PROFINET device function are provided by different Ethernet interfaces. For details, see the regarding user manual.

Setting Ethernet IP addresses in PLCnext Engineer

Disabling the PROFINET function on a device also disables the DCP protocol. This protocol is used by PLCnext Engineer for setting IP addresses, subnet masks, and gateways on an Ethernet interface of a PLCnext Control. The PLCnext Engineer also uses DCP to scan for PROFINET-capable devices. Therefore, after disabling the PROFINET functions along with the DCP protocol on a PLCnext Control, you cannot set up or change the IP settings via PLCnext Engineer, nor scan for devices.

  • Starting with firmware release 2021.6, the Web-based Management (WBM) provides a page for changing IP settings. You need to know the initial IP address to connect to the WBM of the PLCnext Control.
  • On an RFC 4072S, IP settings can also be done by means of the integrated touch display.

Flashing BF LED 

There are two LEDs on a PLCnext Control, assigned with BF-... (short for "Bus Failure").

  • The BF-C LED is always off if there is no PROFINET device defined in the fieldbus section of the project.
  • The BF-D LED flashes red unless a superseding PROFINET controller is connected. 
    Because in many plants there is no superseding PROFINET controller present, this LED blinks permanently although the state does not signal an actual bus failure.

If you want the BF-D LED to stop flashing you can deactivate the PROFINET DEVICE component:

  • from firmware release 2021.0 LTS for AXC F 1152 and AXC F 2152 by means of the PLCnext Patch PndOff function extension, available in the PLCnext Store for free
  • from firmware release 2021.6 by disabling PROFINET DEVICE service via the WBM as described in this topic.




• Published/reviewed: 2024-05-06   ★  Revision 068 •