> For the complete documentation index, see [llms.txt](https://docs.videc.de/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.videc.de/acron-9.3/en/anlagenkonfiguration/prozessanbindung/provider/providerid/treiberauswahl/ecs_gossen-metrawatt.md). # ECS from Gossen Metrawatt #### Background The connection supports all devices from Gossen Metrawatt which use ECL (Energy Control Language) via a serial interface. Data exchange can be configured redundantly, and in this case is effected via two serial interfaces. As soon as a serial interface is no longer working, the Provider switches communication to the alternative interface. Both current online values and the interval archive data can be transferred. #### Functionality for interval archive data The ACRON Provider notes the last time stamp imported for each variable in a definition file and on the next startup resumes the data transfer from that point. If the Provider does not run for a time, no data will be lost provided the station archive is large enough. The definition file is located in the local plant cache path `C:/ProgramData/Acron/PlantCache/MyPlantName` named `GossenMetrawatt.def`. If the file is not present, or if no entry can be found in it for the variable in question, all data as from 1.1.2002 are imported. This is just what happens when you start up the Provider the first time, or when you create a new external variable. Note In case of problems, you can monitor the communication by activating test mode and restarting the Provider. #### Syntax of external variable | | | | ----------------- | ---------------------------------------------------------------------------------------------------------------------------------------------- | | For online values | The variable name is identical to the corresponding ECL command to poll the value (also refer to the ECL documentation from Gossen Metrawatt). | | | | | | OR | | | | | For archive data | ACRON detects that the values are interval archive values based on the keyword "eint". | | | | | | OR | | | | ## Driver ### Driver file Display the name of the selected driver and select a driver from the list of installed drivers ### Version Version of the driver file ### Interface type Display the driver interface type ### Data transfer type Description of the data transfer type ## Driver parameters ### Port1 Port2 Enter at least a port name, e.g. `COM1`. Enter an alternative port, separated by a blank, for redundant operation. ### Baud rate Specified speed of communication over the serial port. Common values are `19200, 9600, 2400`. ### Parity Specified parity of the communication over the serial port. 1 = None 2 = Even 3 = Odd ### Read timeout in msec Time for which ACRON waits after requesting a value before the read operation is aborted. Normally a value between 500 and 2000 is entered. ## Settings ### Measure interval Specify how often ACRON polls the values from the station. ### Polling delay after start Start of data logging in seconds after the ACRON Provider has successfully established process communication. This is useful, for example, if the opposite party takes some time after a restart to initialize all the variables. Recommended entry 0 sec. ### Always display provider window on top Provider windows are always displayed on top ### Activate test mode Display a window with diagnostic messages On startup the ACRON Provider opens a window with diagnostic messages. The log file is stored under the relevant provider name in the ACRON installation path, in the `Log` directory. Note As diagnosis mode heavily influences the performance of the application, and the recorded messages can normally only be evaluated by Technical Support, you should only activate it when prompted to do so by Support. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.videc.de/acron-9.3/en/anlagenkonfiguration/prozessanbindung/provider/providerid/treiberauswahl/ecs_gossen-metrawatt.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.