Recent enhancements to the HART protocol specifications include a new wireless communication option named WirelessHART. As with wired HART, all device measurements and diagnostic information are available at the device or on the network, making device configuration and troubleshooting fast and easy. A WirelessHART adapter, such as the BULLET, attaches to a wired device and enables WirelessHART communication. This article outlines the steps required to add an adapter and to configure it to join the wireless networking using a device type manager (DTM).
The BULLET is the only complete family of WirelessHART adapters designed to meet all application and certification needs including general purpose and intrinsically safe. It is also the only explosion/flame-proof WirelessHART adapter available today! It also allows up to 8 measurement devices to be connected, making wireless very cost-effective.
Why wireless? Wireless networks greatly reduce the wiring and installation cost on a project, as well as enable what in the past have been applications too difficult or expensive to easily be justified. Tank farm monitoring, rotating or mobile equipment monitoring, pipelines, control valves and hard-to-reach areas (e.g., across water or railroad tracks) and many other applications are now easier to monitor. And, when there is no existing available wire, wireless communication greatly reduces the engineering and installation time and expense.
Using the BULLET DTM, we are going to configure the adapter, allow it to join the network and then show some DTM diagnostics to identify a device problem. Using FDT technology, the BULLET DTM enables easy device configuration and set-up. The DTM is very intuitive, reducing errors and improving accuracy. As seen below, the BULLET DTM uses a graphic interface to enhance the set-up procedure.
Figure 1 – BULLET Overview displays the operating condition of the BULLET, Join Status, PV, SV, TV, QV, diagnostic statistics and connected devices.
The BULLET can attach directly to any HART-registered device, 4-20 mA non-HART devices, and it can be installed remotely from the device anywhere on the 4-20 mA current loop. Here are the steps required to configure the BULLET to join the network.
Figure 2 – BULLET Setup Wizard. On this one page, you can configure the short and long tag, power options, and enter the network ID and join key required by the WirelessHART standard so the BULLET can connect to the correct network.
Using the BULLET Setup Wizard (Figure 2) you just enter the BULLET's tag, power settings and the WirelessHART network ID and join key. For security reasons, the latter information can only be entered using a hard-wired connection. For this example, I am using a MACTek Viator USB HART Interface, Model 010031 connected to my PC running the PACTware FDT Frame application and the BULLET DTM. Once the information is entered, the BULLET is ready to join the network. We see in the next image (Figure 3) that the BULLET and the device now appear in the listing of devices that have joined this specific network. This can be confirmed using the BULLET DTM overview page (Figure 1) or the network overview page (Figure 3) from the WirelessHART gateway.
Figure 3 – Pepperl+Fuchs WHA-GW portal view from the WirelessHART gateway showing that the BULLET's connected and transmitting live data.
The image in Figure 4 clearly indicates that there is problem with the device as indicated by the warning symbols. By using the DTM and the diagnostic information (circled) in the device, we can quickly determine the problem. In this example, the output is out of the configured measuring range.
VIDEO: Using a DTM to Simplify Joining a BULLET WirelessHART
Recent enhancements to the HART Protocol specifications include a new wireless communication option named WirelessHART. Like with HART, all device measurements and diagnostic information is available at the device or on the network making device configuration and troubleshooting fast and easy. A WirelessHART adapter (like the BULLET) attaches to a wired device and enables WirelessHART communication. This article video showcases the steps required to add an adapter and to configure it to join the wireless networking using a DTM.
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