C135 PCS 7 (PCS7)
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Configuring and Troubleshooting WinCC Lifebeat Monitoring in SIMATIC PCS 7 Redundant Architectures

Configuring and Troubleshooting WinCC Lifebeat Monitoring in SIMATIC PCS 7 Redundant Architectures

Lifebeat Monitoring (LBM) in SIMATIC PCS 7 WinCC cyclically monitors the operational health and network accessibility of all automation stations (S7-400 CPUs), operator stations (OS Servers, OS Clients), and network infrastructure across the Plant Bus and Terminal Bus. In redundant OS Server environments, Lifebeat Monitoring must be configured on both redundant servers to ensure continuous supervision upon failover. WinCC exchanges cyclic heartbeat telegrams, automatically updating device status symbols on the system overview picture (@Maintenance.pdl or @Plant_Overview.pdl) and triggering alarms if an agent stops responding.

Table of Contents

Executive Summary

In continuous process automation, rapid annunciation of communication failures between supervisory systems and field controllers is vital to plant safety. The Lifebeat Monitoring (LBM) editor in SIMATIC PCS 7 WinCC provides centralized, visual supervision of all hardware participants across the control topology. By continuously dispatching cyclic watchdog requests over the Plant Bus (to S7-400 CPUs) and Terminal Bus (to OS Clients and peer servers), Lifebeat Monitoring identifies communication dropouts before operators attempt manual interventions on un-monitored equipment. A frequent commissioning question centers on whether Lifebeat Monitoring must be configured identically across both servers in a redundant pair. This technical guide clarifies LBM mechanics and configuration rules.

WinCC Lifebeat Monitoring (LBM) Functional Principles

Lifebeat Monitoring operates as a specialized WinCC background service (CCLifebtr.exe):

  • Cyclic Polling: Dispatches status queries to configured automation components at user-defined intervals (typically 5 to 10 seconds).
  • Graphic Display: Automatically populates and updates the system overview picture (@Maintenance.pdl, @Overview.pdl, or @Plant_Overview.pdl) with standardized device icons.
  • Alarm Generation: If a station fails to acknowledge three consecutive heartbeats, LBM triggers an un-acknowledged process alarm (e.g. 'Connection fault: AS1'), and renders the device icon with a flashing red warning border.

Heartbeat Mechanism and Monitored Component Scope

Lifebeat Monitoring supervises diverse component categories:

  • Automation Stations (AS): S7-400, S7-400H, and S7-300 controllers connected via Industrial Ethernet or PROFIBUS.
  • Operator Stations (OS): OS Servers, Redundant Partners, OS Clients, Central Archive Servers (CAS / Process Historian), and Web Servers.
  • Network Devices: SCALANCE network switches and third-party nodes via ping or SNMP queries.

Configuring Lifebeat Monitoring in Redundant OS Server Environments

In redundant OS Server systems, configuration consistency is critical:

  • Lifebeat Monitoring must be configured on both redundant servers.
  • While the OS Project Editor in PCS 7 generates system pictures automatically, the list of monitored device nodes and network addresses must be synchronized across both project databases.
  • If Server A fails, Server B continues monitoring all field devices independently, ensuring uninterrupted asset visibility.

Lifebeat Monitoring Component Status Matrix

The following table defines the operational status indicators used in Lifebeat Monitoring:

Status StateGraphic Symbol AppearanceDiagnostic MeaningUnderlying ConditionOK / HealthyGreen Icon / No borderDevice operationalAcknowledging heartbeats cyclically.Fault / DisconnectedRed Flashing IconCommunication FailureCable disconnected, CPU powered off, or crashed service.Maintenance StateYellow Symbol / WrenchPreventive WarningRedundancy lost or diagnostic buffer warning present.Disabled / InactiveGrayed-Out SymbolMonitoring SuspendedNode marked inactive for planned outage.

Step-by-Step Procedure to Configure Lifebeat Monitoring

Method: Configuring Lifebeat Monitoring Editor in WinCC

  1. In SIMATIC Manager, open the OS Server project in WinCC Explorer.
  2. In the navigation tree, double-click Lifebeat Monitoring to launch the editor.
  3. In the Devices tab, review the list of auto-generated stations (transferred during OS compilation).
  4. To add manual devices, click Add device:
    * Enter Device Name (e.g. AS_BOILER_01).
    * Select Device Type (S7-400, OS-Client, or PC-Station).
    * Select the associated Connection from Tag Management.
  5. In the Picture settings tab, select the target overview picture (e.g. @Plant_Overview.pdl).
  6. Click Generate Picture; the editor automatically creates and arranges the device status symbols.
  7. Open Computer Properties > Startup; confirm that Lifebeat Monitoring is checked in the runtime startup list.
  8. Duplicate this configuration on the redundant partner server (or duplicate via Project Duplicator).
  9. Download the OS projects and activate Runtime.

Verification

To verify that Lifebeat Monitoring is active and functional:

  1. Overview Picture Audit: In WinCC Runtime, navigate to the System Overview picture. Confirm that all CPUs and OS clients appear with green healthy symbols.
  2. Simulated Disconnection Test: Temporarily disconnect the communication cable to an auxiliary station. Confirm that within 15 seconds, the station icon transitions to flashing red.
  3. Alarm Generation Check: Inspect the WinCC Alarm Control. Verify that a system alarm 'Failure of station ' is logged with a precise timestamp.
  4. Reconnection Recovery: Reconnect the cable. Confirm that the icon automatically returns to green and the alarm clears.

Limitations and Operational Precautions

  • Network Polling Overhead: In large plants with dozens of controllers, do not configure the monitoring cycle below 5 seconds; excessive polling telegrams consume Plant Bus bandwidth.
  • Do Not Delete Auto-Generated Icons: Manual deletion of LBM icons from @Overview.pdl causes script execution errors; always manage device presence through the Lifebeat Monitoring editor.
  • Maintenance Station Synergy: If deploying a full PCS 7 Maintenance Station (MS), MS diagnostic screens provide richer sub-module and channel-level diagnostics than basic Lifebeat Monitoring.

Engineer FAQ

Does Lifebeat Monitoring require a separate license?

No. Lifebeat Monitoring is a standard built-in option included with all SIMATIC PCS 7 OS Runtime licenses.

Can Lifebeat Monitoring monitor third-party devices such as network printers?

Yes, by adding a generic PC station and configuring ping-based network monitoring.

Why does a healthy CPU show as failed in Lifebeat Monitoring?

Verify that the symbolic connection name in LBM matches the active connection in Tag Management and that named S7 connections are downloaded.

Technical References

Related Articles

Related Tags

  • https://industrialautomation.net/search?query=simatic-pcs7
  • https://industrialautomation.net/search?query=wincc
  • https://industrialautomation.net/search?query=lifebeat-monitoring
  • https://industrialautomation.net/search?query=diagnostics
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