The ProLinx DF1 Serial Port Expander Gateway allows you to attach up to three separate DF1 master devices to a single DF1 slave. The module is designed to act as a multiplexer, allowing simultaneous connections from multiple DF1 masters to a single DF1 slave. A common use for the module is to have an HMI panel, SCADA software, and Programming software all communicating to the same DF1 channel 0 port of the Rockwell Automation processor. The module provides a single DF1 Master port and three DF1 Slave ports.
The ProLinx module contains an internal database that consists of areas for application data, status information, and configuration information.
The internal database is shared between all ports on the module and is used as a conduit to pass information from a device on one network to one or more devices on another network.
This area is used to store error codes, counters, and port status information for each port.
This area contains module configuration information such as port configuration, network information, and command configuration. This configuration file is downloaded to, or uploaded from, this area.
The data area is used to store and retrieve data by the protocol drivers and for data exchange between protocols. The database is used as a source for write commands to remote devices and holds data collected from the remote devices. Commands defined in the configuration file (stored in the configuration data area) control how the data is to be handled in the database.
The Serial Port Expander adds three additional slave ports for a DF1 based device. This allows users to connect programming software, HMI, and modems to processors simultaneously. Commands from the host devices are passed through the module and routed directly to the front port of the processor. This allows a processor's port to be expanded to allow communication with a variety of devices at the same time. Typical applications include local ladder configuration, local operator interface, and wireless concentrator for remote programming and data collection.