### Communicating locally with the OptiFlex™ controller You can connect a laptop to the OptiFlex™ controller's: Service port to set up the controller's address, ports, protocols, and baud rates Rnet port to commission, download, and troubleshoot equipment through WebCTRL® or Field Assistant NOTE If needed, you can disable communication with the Rnet port.
#### To communicate with the OptiFlex™ controller's Service Port Using a computer and an Ethernet cable, you can communicate with the OptiFlex™ controller's setup pages through a web browser to: View the controller's Module Status report View/change controller and network settings Set up ports, protocols, and baud rates Troubleshoot The information shown on the controller setup pages is specific to the controller. See the controller's Technical Instructions for details. Connect an Ethernet cable from a computer to the controller as shown below. If your computer uses a static IP address, set the address to 169.254.1.x, where x is 2 or greater. If it uses a DHCP address, leave the address as it is. Turn off the computer's Wi-Fi if it is on. Open a web browser on the computer. Navigate to http://local.access or http://169.254.1.1 to see the controller setup pages.
#### To communicate locally through the OptiFlex™ controller's Rnet port You can connect a computer to the OptiFlex™ controller's Rnet port to commission, download, and troubleshoot equipment through the WebCTRL® application or Field Assistant. PREREQUISITES A computer with a USB port A USB Link Kit. See the USB Link Kit Technical Instructions. NOTES The USB Link Kit driver is installed with a WebCTRL® v5 or later system. But if needed, you can get the latest driver from http://www.silabs.com/products/mcu/Pages/USBtoUARTBridgeVCPDrivers.aspx. Install the driver before you connect the USB Link Kit to your computer. You will use only the portion of the USB Link Kit that has the USB connector. CAUTION If multiple controllers share power but polarity was not maintained when they were wired, the difference between the controller's ground and the computer's AC power ground could damage the USB Link Kit and the controller. If you are not sure of the wiring polarity, use a USB isolator between the computer and the USB Link Kit. Purchase a USB isolator online from a third-party manufacturer. A 3-pin screw terminal connector and 3-wire cable Connect one end of a piece of 3-wire cable to the 3-pin connector. Connect the other end of the 3-wire cable to the 's Rnet port as shown in the drawing above in step 1. Connect the 3-pin connector to the portion of the USB Link Kit shown in the drawing below, then connect the USB connector to the computer. NOTE If using a USB isolator, plug the isolator into your computer's USB port, and then plug the USB Link Kit cable into the isolator.
#### To set up a local access connection in the WebCTRL® interface For the WebCTRL® application to communicate with the Rnet port, you must do the following: On the System Configuration tree, select Connections. On the Configure tab, click Add. From the Type drop-down list, select BACnet Local Access. Optional: Edit the Description. Type the computer's Port number that the USB cable is connected to. NOTE To find the port number, plug the USB cable into the computer's USB port, then select Start > Control Panel > System > Device Manager > Ports (Com & LPT). The COM port number is beside Silicon Labs CP210x USB to UART Bridge. Set the Baud rate to 115200. Click Accept. On the View tab, click the button next to the BACnet/IP network, then select BACnet Local Access. Click Accept. On the Configure tab, select BACnet Local Access, then click Start. NOTE If an error message appears, make sure the COM port you selected is not in use. For example, PuTTY may be open and is holding the port open. On the Network tree, select the controller that you are connected to. Click , then select Manual Command. Type`rnet here` in the dialog box, then click OK. On the Properties page, click Module Status. If a Modstat report appears, the WebCTRL® application is communicating with the controller.