Download UBD User Manual

Høgskolen i Telemark
3.4 Wireless HART
Wireless HART is Emerson Process Management´s (hereafter Emerson) own wireless system.
This system needs a wireless gateway to be able to communicate with the automation blocks that
in turn communicate with the automation HMI. In cases where the gateway, transmitters and
controllers are compatible by version, this is all you need for communication with the
automation blocks.
Wireless HART implements a masking system for communication between the individual
transmitters/controllers and the gateway. With this system in place there is no need for every
transmitter to be in direct contact with the gateway. It is sufficient that the transmitters have a
connection between them, as long as one of these transmitters are in contact with the gateway.
The transmitters and the gateway on the UBD-Model are not directly compatible. A Modbus
card is therefore needed to communicate between the gateway in the process and the DeltaV
process control. The communication between the gateway and automation blocks is established
by a network connection (Ethernet RJ-45). The gateway is located over the entrance door to
room B-294-b and is shown in Figure 3-2
Figure 3-2 Wireless Gateway
3.5 OPC Mirror
OPC mirror is a software that makes it possible to connect a wide variety of hardware to a
specified automation program. In this case OPC mirror is used for communication between
National Instruments hardware and DeltaV. In the case of the UBD-model, most of the values
are from the National Instruments (NI) cabinet shown in Figure 3-2. To make these NI values
DeltaV compatible, OPC mirror is used to “convert” between the two.
8