Data point types for the symbol catalog, basics
The WinCC OA symbol catalog contains a range of objects used in process control technology to help you create your projects more quickly and easily. Some of the objects (STD_OBJECTS) need data point types, which are summarized in the following tables. These include the standard AC types together with their compression levels (see Archiving/Compression, and Laboratory values).
Naming conventions for data point elements:
The DPT structure that is used is shown for each object. The structure is based on the following definition:
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*.cmd.* (*.cmd): for commands
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*.state.* (*.state) : for digital responses
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*.value.* (*.value): for analog responses
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*.alert.* (*.alert): for alerts, with group alert to .alert.sumalert
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*.para.* (*.para): for parameters that are not commands
Some DPEs are only displayed, that is to say can only be used if a periphery address is enabled.
All symbols have been created as a WinCC OA reference panel and provided with their own configuration panel. They are free AddOns that are only created from WinCC OA objects. Like all references, the standard symbols can be dragged into a panel from GEDI catalogs (see The catalog window ), and are then ready for use immediately after passing the data point parameters.
| Data point type | Description |
|---|---|
| Analog1 | This data point type can be used to represent analog values without additional alerts from the PLC. One of the standard AC types (see Archiving/Compression). |
| Analog2 | Like Analog1 but with alerts from the PLC. The analog value is mapped onto *.analog.value. |
| Bit_Condition | This data point type can be used to display bits as status or fault messages. |
| Counter1 | This data point type can be used to display count values. |
| Counter_Sub | Counter with compression levels, as type reference for Counter1. One of the standard AC types (see Archiving/Compression). |
| Drive1 | This data point type can be used to display a non-controllable drive with a choice of one or two directions of rotation. Faults and operating mode messages can be displayed as an option. |
| Drive2 | This data point type can be used to display a controllable drive. There are four different versions to choose from. |
| Labor_Analog | This data type can be used to compress analog laboratory values (values entered manually). One of the standard AC types (see Archiving/Compression, Laboratory values) |
| Labor_Counter | This data type can be used to compress laboratory values (values entered manually) that use summation (as count value). One of the standard AC types (see Archiving/Compression, Laboratory values) |
| Mode_Cmd | This data point type is used as a type reference for Drive2 and Pump2. It lets you switch between manual and automatic mode. |
| Mode_State | This data point type is used as a type reference for Drive1, Drive2, Pump1 and Pump2. Used for messages about operating modes. |
| Pump1 | This data point type can be used to display a non-controllable pump with a choice of one or two speeds. Faults and operating mode messages can be displayed as an option. |
| Pump2 | This data point type can be used to display a controllable pump. There are two different versions to choose from. |
| Setpoint | This data point type can be used for setting and retrieving values. |
| Slide_Valve_Hand1 | This data point type can be used to display a valve or slide valve that can be adjusted graphically (not connected to the process). |
| Slide_Valve1 | This data point type can be used to display a non-controllable valve or slide valve. Faults and operating mode messages can be displayed as an option. |
| Slide_Valve2 |
This data point type can be used to display a controllable valve. Faults and operating mode messages can be displayed as an option. Only .mode.remote and .mode.man must exist. |
| Wh_Sc_Service | Data points of this data point type store the service data from operating-time counter 1 or operations counter 1. The data point name is issued automatically: xxxx_n, where xxxx is the name of the WH_SC1 data point, n is a serial number, since several service options can be defined for one DP. |
| Wh_Sc_Sub | This data point type is used as a type reference in WH_SC1. The count value is mapped onto *.value and has been assigned suitable AC compression levels. One of the standard AC types (see Archiving/Compression) |
| Wh_Sc1 | This data point type can be used to display information from an operating-time counter or operations counter. |
