Rittmeyer WSR3000 Communication Driver is intended for data connection between Reliance's runtime software and Rittmeyer WSR3000 devices connected via the WSK150 communication unit.
These are the driver's main benefits:
Communication with a PLC runs in one of the following ways:
The communication driver is a DLL loaded into memory by the Reliance 4 Driver Server program, which can be launched either as a Windows service at Windows startup or as a standard application at the start of a visualization project. Information required to make a connection with devices is read from the visualization project. Communication to the devices is optimized at the start of the visualization with respect not to overload the communication lines.
The device's data is read based on the so-called “Spontaneous Reports”. At startup, the driver establishes a connection with individual data points in the devices. The devices then send current data only in case the tag value changes.
The so-called “Forced Update Interval” can be configured for each tag. If the tag value stays the same at a specified interval, the driver sends a request for a data update which is independent of the spontaneous reports.
The loss of connection is detected if the communication driver doesn’t receive a valid response Nx consecutively (N represents the maximum number of failed communications). This parameter can be adjusted.
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