Device Parameters; Operating Parameters - ABB TZIDC Manual

TZIDC DIGITAL POSITIONER | DS/TZIDC-EN REV. G
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Device parameters

General
Microprocessor-based position control in the positioner
optimizes control. The positioner features high-precision
control functions and high operational reliability. Due to their
elaborate structure and easy accessibility, the device
parameters can be quickly adapted to the respective
application.
The total range of parameters includes:
•

Operating parameters

• Adjustment parameters
• Operation monitoring parameters
• Diagnosis parameters
• Maintenance parameters
Operating parameters
The following operating parameters can be set manually if
required:
Setpoint signal
0 to 100 % freely selectable for split-range operation
For 4 to 20 mA and HART version:
• Signal min. 4 mA, max. 20 mA (0 to 100 %)
• Minimum range 20 % (3.2 mA)
• Recommended range > 50 % (8.0 mA)
Action (set point signal)
Increasing:
• Position value 0 to 100 % = direction 0 to 100 %
Decreasing:
• Setpoint signal 100 to 0 % = direction 0 to 100 %
Characteristic curve (actuator travel = f {set point signal})
Linear, equal percentage 1:25 or 1:50 or 25:1 or 50:1 or freely
configurable with 20 reference points.
Actuator travel limit
The actuator travel, i.e. the stroke or angle of rotation, can be
reduced as needed within the full range of 0 to 100 %,
provided that a minimum value of 20 % is observed.
Shut-off function
This parameter can be set separately for each end position.
When the associated limit value is up-scaled, the function
causes immediate travel of the actuator to the selected end
position.
If the value '0' is entered for the corresponding parameter,
the position is further controlled, even in the respective end
position.
Actuator travel time prolongation
This function can be used to increase the max. travel time for
full travel. This time parameter can be set separately for each
direction.
This function can only be used with the pneumatics with the
safety function 'fail-safe'.
Switching points for the position
You can use these parameters to define two position limit
values for signaling, see option 'Module for digital position
feedback'.
Digital output
The alarms generated in the positioner can be polled via the
digital output as a collective alarm.
The desired information can be selected via the operator
panel or remotely via the configuration program.
The output can be set to 'active high' or 'active low', as
required.
Digital input
For the digital input, one of the following safety options can
be selected. You may use the operator's panel or
configuration program to select an option.
• No function (standard setting)
• Move to position 0 %
• Move to position 100 %
• Hold previous position
— Block local parameterization
— Block local parameterization and operation
— Block all access (no local or remote access via a PC)
The selected function is activated when the 24 V signal is no
longer connected to the digital input (< 11 V DC).
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