Technical Specifications
627
Configure Tab
Fields
Polling Address HART can communicate with up to 15 devices on a single pair of
wires. These devices are distinguished by their polling address
which is a number from 0 to 15. If there is a device at polling
address 0, it must be the only device on the loop. There may be up
to 15 devices with non-zero polling addresses on the loop (subject
to power and intrinsic safety constraints). Devices which operate
4-20 mA are generally required to have polling address 0, however
with split range valve positioners, several 4-20 mA devices may be
wired in series. These devices should be set up with non-zero poll-
ing addresses.
Switches The SVI2 contains as an option, an output switch that can opened
or closed in response to conditions that the SVI2 detects. These
conditions are:
Disabled - The switch is not controlled by the SVI2 and
remains in its default position.
Failsafe - The switch is activated when the SVI is in failsafe
mode.
Reset - The switch is activated whenever a reset has
occurred and the switch remains activated until the SVI2
status is cleared.
Position error - The switch is activated whenever a position
error has occurred and is deactivated when the position
recovers to the correct position.
Tight shutoff activated - The switch is activated whenever
the device is in tight shutoff. Tight shutoff is on and the
valve position is less than the tight shutoff position.
Position low limit - The switch is activated whenever the
valve position is less than the position setting of this switch
control.
Position upper limit - The switch is activated whenever the
valve position is greater than the position setting of this
switch control.
Manual mode - The switch is activated whenever the SVI2 is
in manual mode, configure mode, calibrate mode, or
diagnostic mode.
The switch can be configured to default as normally open
or normally closed.
Language The SVI can display its menu in English or French. Use this list
box to choose a language. The ValVue program is not affected.