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Controller with two communications ports

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article image Allows the connection of a local computer for the upload, download or monitoring of programs while still maintaining network connectivity.

The Allen-Bradley MicroLogix 1200 small controller from Rockwell Automation is now available with two communications ports. The new programming/human-machine interface (HMI) port allows the connection of a local computer for the upload, download or monitoring of programs while still maintaining network connectivity. Alternatively, it can provide an interface to a local display terminal, increasing application flexibility and helping to reduce system cost.

Low-cost, compact programmable controllers were often considered standalone units with little concern for communications. The Allen-Bradley MicroLogix 1200R controllers provide a number of communication options on one port without disturbing system configuration. The additional port improves programming efficiency and decreases troubleshooting time by providing local connectivity for an operator interface or programming terminal while the primary port remains connected to a network, modem or ASCII device.

The programming/HMI port supports the DF1 full-duplex open protocol on RS-232 and requires no configuration. This port is respond only, which allows it to be fully-functional when connected to a computer running Rockwell Software RSLogix 500 programming software, or when connected point-to-point with an Allen-Bradley PanelView operator interface terminal for local HMI.

Six new Allen-Bradley MicroLogix 1200 controllers mirroring the current 24 and 40-point MicroLogix 1200 controllers have the new programming/HMI port. All of these use the same RSLogix500 software and the new port uses the same eight-pin mini-DIN connector as the primary port. Current users can continue to use their existing software and cables.

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