Diagnosis Parameters; Operator Panel - ABB TZIDC Manual

8 TZIDC DIGITAL POSITIONER | DS/TZIDC-EN REV. G
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... Device parameters
Adjustment parameters
The positioner has a special function for automatic
adjustment of the parameters. Additionally, the control
parameters can be set automatically (in adaptive control
mode) or manually to optimally adapt them to the process
requirements.
Tolerance band
Upon reaching the tolerance band, the position is re-adjusted
more slowly until the dead band has been reached.
Dead band (sensitivity)
When reaching the dead band, the position is held. The
factory setting for this parameter is 0,1 %.
Actuator spring action
Selection of the direction of rotation of the sensor shaft
(looking at the open housing), if the safe position is
approached as a result of the spring force in the actuator
(actuator is depressurized via Y1 / OUT1).
For double-acting actuators, the actuator spring action
corresponds to pressurizing the pneumatic output (Y2 /
OUT2).
Display 0 to 100 %
Adjust the display 0 to 100 % in accordance with the direction
for opening or closing the final control element.
Operations monitoring parameters
Various functions for continuous device monitoring are
implemented in the operating program for the positioner.
The following states will be detected and indicated, e.g.:
• Setpoint signal out of range 4 to 20 mA
• Position out of the adjusted range
• Positioning time up-scaled (adjustable time
parameter)
• Positioner inactive
• Counter limits up-scaled (adjustable in diagnosis)
While automatic commissioning is in progress, the current
state is continuously indicated on the integrated LCD display.
During operation, the LCD shows the most important
process variables:
• Current position in %
• Faults, alarms, messages (coded)
Access to extended monitoring parameters is possible via
HART communication and the DTM.

Diagnosis parameters

The diagnostics parameters in the positioner's operating
program provide information about the operating conditions
of the valve.
From this information the operator can derive what
maintenance work is required, and when.
Additionally, limit values can be defined for these parameters.
When they are exceeded, an alarm is reported.
So, for example, the following operating values are
determined:
• Number of movements of the final control element
• Sum of individual actuator travel events
The diagnosis parameters and limit values can be called up,
set, and reset via HART communication, using the
configuration program.

Operator panel

The integrated operating panel of the positioner has four
operating buttons which allow the device to be operated with
an open housing cover. The following functions can be
controlled via the function keys:
• Observe live operation
• Manual intervention during live operation
• Parameterization of the device
• Fully automatic commissioning
The operating panel has a cover to protect against
unauthorized operation.
Figure 7: Open TZIDC with a view of the operating panel