VVP10 HART
HART
®
VALVE POSITIONER
INSTALLATION, OPERATION, CONFIGURATION AND MAINTENANCE MANUAL
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46
In the graph of figure 3.32, the
Temperature Out of Range
alarm
will be activated, and the counter will be incremented in the T1 and
T2 regions, considering the values of the limits in the black
horizontal lines (disregarding oscillations in the 1°C range). The
alarm will be deactivated at all other points on the graph between
the configured limits.
The diagnostics also provides the user with the maximum and
minimum temperature values recorded during the positioner
operation, since the last reset. On restarting, counter,
maximum/minimum registers and alarms are reset.
The default values for the Temperature parameters are
Temperature Lower Limit = -40°C, Temperature Upper Limit =
85°C
and
Temperature Counter Limit = 0
(see note).
Figure 3.32 – Example of temperature alarms.
Digital I/O
The VVP10 HART has an auxiliary function for monitoring discrete input signals (superior and inferior), such as valve
end switches, for example. With the digital input function enabled in the
Dig Input Mode
parameter, the
Dig Input Low
and
Dig Input High
alarms will be activated when the terminal inputs
DI1
and
DI2
are activated, respectively.
The discrete output function also has two channels
(
DO1
and
DO2
), enabled in the
Dig Output Mode
parameter. The action of the outputs can be configured
to follow the digital inputs (
DI1
and
DI2
) or to monitor
the position limits configured in
Dig Out Low Limit
and
Dig Out High Limit
, for outputs
DO1
and
DO2
,
respectively. This action is configured by the
Dig Out
Action
parameter.
The user can also configure the verification time to
generate the output alarm, through the
Dig Out Alert
Time
parameter.
Figure 3.33 – Connections for digital inputs and outputs.
Thus, when the event of generation of any of the outputs occurs, a time counter will be triggered so that the outputs
are only generated after the time configured by the user. In addition to activating the
Dig Output Low
and
Dig Output
High
alarms, the
DO1
and
DO2
terminals will output the signals corresponding to the outputs (high or low).
Figure 3.33 shows the connection terminals for the VVP10 HART digital input and output channels.
WARNING
This diagnostic will only be available for the discrete and complete models of positioner. Check the Product
Order Code for this feature (section 6.2).
