Technical Specifications

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Using a Device List File The device list can be saved in a file to eliminate rescanning each
time Connect is selected. This is useful only with multiplexors. Unless
Load Device List from Database on Startup is selected as an option,
the device addresses file used is temporary and is rescanned each
time the program is restarted. If selected, you can select a file to
save the device list. This file is read when the program is started and
the list displayed. Select New File to change the file or create a new
one.
Com Port Selection Select the COM Port on your PC that is connected to the HART
modem. If you’re not sure about the COM port the modem is con-
nected to, go to the Windows Device Manager to locate the Com
Port number assigned to the PC.
Multidrop When more than one device is connected to a loop or if polling
addresses other than 0 have been assigned to devices, select Allow
Multidrop. ValVue ESD supports HART devices, including SVI and SVI
II, SVI II ESDs, and HDLTs with non-zero polling addresses and sup-
ports multiple SVI and SVI II and SVI II ESDs on the same loop for split
ranging, for example. If the box is unchecked, ValVue ESD looks for
devices only at polling address 0. When in multidrop mode, even if a
device is found at polling address 0, ValVue ESD polls addresses up to
15.
Master Mode ValVue ESD can send commands to a HART device as a primary mas-
ter or as a secondary master. HART is a Master-Slave communication
protocol, where the slave (field device) replies to commands sent by
the master. The HART protocol allows for a device to communicate
simultaneously with two masters, as long as they are different Mas-
ters. One being a Primary Master and the other being a Secondary
Master. A Primary Master is defined as a host (or interface) which is
connected permanently with a slave, such as a control system. A
Secondary Master is a host (or interface) connected temporarily to
the slave (like a handheld or laptop computer) and that is not part of
the control system.
When used with a multiplexor, operation is allowed when a second
HART master, such as a DCS system, is communicating. The ValVue
ESD program must be configured to match the configuration of the
multiplexor. If the multiplexor is a primary master, ValVue ESD must
also be configured to be a primary master.