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Southbound Interfaces
The process connection to the actual machines/sensors.
S7Plus Driver
The WinCC OA S7Plus driver uses the Siemens communication library IOMS and is meant for the communication with Siemens S7 PLCs.
Configuration
Time settings
This chapter acts as a guide to the "time settings" tab.

Version Information
Release Notes, Update information, Certifications and Frequently Asked Questions.
Concepts
Your first step into modern and powerful process visualization.
Deployment
Topics, you need to know, before using WinCC OA.
Security
Go beyond the norm in cybersecurity.
Engineering
Powerful tools for easy or complex engineering tasks.
Data Management
Classify, structure and archive your data.
Business Logic / Control
Endless possibilities in data processing for your projects.
Data Visualization
User interfaces, Trends and Reports for every purpose and device.
Southbound Interfaces
The process connection to the actual machines/sensors.
- S7Plus Driver
  The WinCC OA S7Plus driver uses the Siemens communication library IOMS and is meant for the communication with Siemens S7 PLCs.
  - Requirements and installation
    The additional requirements and necessary installation steps for the S7 Plus driver.
  - S7Plus Driver Configuration
    This chapter is a guide to the settings that can be applied in the S7Plus driver configuration panel.
  - Configuration
    - Connection
      This chapter explains the configuration of connection parameters for the driver.
    - Engineering
      This chapter acts as a guide to the "Engineering" tab in the S7 Plus configuration panel.
    - S7 Plus Driver Advanced Settings
      This tab provides further configuration options, e.g. defining the driver behavior on connection establishment.
    - Time settings
      This chapter acts as a guide to the "time settings" tab.
    - TSPP
      This chapter acts as a guide to the "TSPP" tab. This tab provides configuration options for using TSPP with the S7Plus driver.
    - State details
      This chapter acts as a guide to the "state details" tab. The tab provides details on the respective connection state.
    - Statistics
      This chapter acts as a guide to the "statistics" tab. This tab provides statistical information on data sent and received.
    - S7 Channel Diagnostic
      The S7 Channel Diagnostic provides additional diagnostic information for the connections of the S7 Plus driver.
  - S7Plus PLC Alarms
    With the help of the WinCC OA S7+ alarming, PLC alarms can be triggered and acknowledged in WinCC OA. I.e. by an acknowledgement in WinCC OA the alarms are also acknowledged in the PLC.
  - TIA importer
    This chapter describes the TIA importer which allows an easy creation and utilization of PLC data in WinCC OA.
  - S7Plus Subscriptions
    This chapter describes the use of Subscriptions with the S7 Plus driver.
  - S7Plus Certificates
    This chapter introduces the use of certificates for the S7 Plus driver-
  - Definition of peripheral addresses for the S7Plus driver
    This chapter describes the definition of peripheral addresses for the S7Plus driver.
  - [s7plus]
    Settings for the S7Plus driver
  - Internal data points of the S7Plus driver
    This chapter describes the internal data points related to the S7 Plus driver.
  - Details on the S7Plus driver
    This chapter describes possible debug levels and error codes of OMS+.
  - FAQ - S7 Plus Driver
    Frequently asked questions about the S7Plus driver in WinCC OA.
  - Notes and Restrictions
    Useful notes and restrictions for the use of the driver.
- S7 Driver
  The WinCC OA S7 driver is a native driver for connection to the periphery with Siemens S7 PLCs.
- OPC Unified Architecture (OPC UA)
  OPC Unified Architecture (in short OPC UA) is the most recent OPC specification from the OPC Foundation and differs significantly from its predecessors (DA, A&E, HDA). OPC UA forms a new standard, which is completely based on a service-oriented architecture.
- OPC Client
  This chapter explains the most important terms and presents the steps involved in starting a functioning OPC communication. The individual points will be dealt with in more detail in the subsequent chapters.
- OPC Alarms & Events
  OPC Alarms & Events (brief OPC A&E) is in addition to the Data Access another standard in order to implement a central alert management manufacturer spanning. OPC A&E is used to guarantee the coupling with other control systems as well as to display alerts and events in a hierarchical system
- IEC 60870-5 Driver
  IEC drivers are standardized remote control drivers that can contain proprietary telegrams.
- IEC 61850 Driver
  IEC 61850 defines an architecture for meeting the needs of electrical substation automation.
- Modbus/TCP Driver
  Modbus/TCP is an adaptation of the serial Modbus protocol for TCP/IP communication. The Modbus/TCP driver can be used for Modbus/TCP or UNICOS at the same time.
- SNMP
  SNMP (Simple Network Management Protocol) is a protocol for monitoring network devices (servers, workstations, routers, switches and hubs etc.) and their functions. It allows you to administer your network.
- BACnet Driver
  BACnet (Building Automation and Control Networks) is a normed protocol for building automation and was designed by ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers) in order to provide a consistent and intraoperative standard for data communication in and with systems of building automation.
- DNP3 Driver
  The WinCC OA DNP3(Distributed Network Protocol 3) driver uses an open, robust and modern protocol, which has similar characteristics and strong points like the IEC Driver. The transmission of any number of telegrams with different data types occurs between the WinCC OA system (master) and the outstation (slave).
- Ethernet/IP Driver
  Ethernet/IP is used to communicate with multiple generations and families of Rockwell Automation / Allen Bradley PLCs. It is an application layer protocol, layered on top of standard TCP/IP networking.
- MQTT
  MQTT (Message Queuing Telemetry Transport) is a messaging protocol which works on top of the TCP/IP protocol and is meant for communication in networks with limited bandwidth.
- PROFIsafe Driver
  As an application profile of PROFINET, PROFIsafe is responsible for the communication between safety devices (F-Device) and safety controllers (F-Host).
- S-Bus Driver
  The WinCC OA S-Bus driver is used for the connection from SAIA PCD control devices to WinCC OA projects.
- SSI Driver
  The WinCC OA SSI driver is used for interfacing SAT remote systems.
- SINAUT Driver
  SINAUT (SIemens Network AUTomation) is a communication protocol for automatic monitoring and controlling of remote process stations on basis of SIMATIC S7 developed by Siemens.
- RK512 Driver
  The WinCC OA driver RK512 is used for interfacing a programmable logic controller using the 3964R/RK512 protocol.
- Simulator Driver
  The WinCC OA simulator assumes the tasks of a driver without being connected to actual peripherals. This means it simulates the periphery and is able to generate values "spontaneously". It does this by passing data to the Event Manager that this manager would receive from system components during normal operation of a system. The control system functions can be tested after configuration.
- NTCIP Gateway
  NTCIP (National Transportation Communications for ITS Protocol) is a family of open standards for the configuration, control and monitoring of traffic control equipment (e.g. traffic lights, dynamic message signs, vehicle counting).
- TLS Gateway
  The WinCC OA TLS gateway (Technical Delivery Terms for Route Stations) is a standard for using and establishing traffic control systems on roads.
Northbound Interfaces
Your portal to the cloud or supervising systems.
Web Connectivity / Network Interfaces
Data exchange, APIs and web technologies
User Management
All about authorization, authentication and login-customization.
Availability
How to get your system uptime to the maximum.
Reporting
Create state of the art project reports without limits.
Addons
Useful tools and enhancements for special demands.
Reference Tables
Detailed and extensive content for special project adaptation.
Videos & Tutorials
Explore the capabilities of WinCC OA with our carefully selected collection of video tutorials and guides.
WinCC OA Documentation
Basic information about terms and functions within the documentation.
Disclaimer
A brief clarification of liability exclusions or legal notices.

Time settings

This chapter acts as a guide to the "time settings" tab.

This tab allows you to define the behavior on connection loss and to specify whether time synchronization is performed.

Figure 1. Time settings tab

Intervals / timeouts

Keep alive timeout

The driver recognizes a loss of connection after the defined keep alive timeout.

Reconnect interval

Defines the intervals in which the driver tries to reestablish the connection after a connection loss.

Note:

To detect connection failures (IP address of the PLC not accessible/available) under Linux faster, the following entry in /etc/sysctl.conf can be modified:

net.ipv4.tcp_syn_retries=<n>

E.g. n = 3 results in 15 seconds (2^n - 1), refer to the Linux man pages for further information.

PLC time

Displays the current PLC time. The time is refreshed every 30 seconds.

Time synchronization

Sync PLC time

Enables the time synchronization of the PLC with the WinCC OA server.

Sync interval

Defines in which intervals the time shall be synchronized.

Use UTC

Defines if you want to use UTC.

Offset

If necessary, you can define an offset to your local time in 15 minute steps.