ABB TZIDC-200 Digital Positioner Device parameters

Device parameters

General remarks

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

— Monitoring parameters

— Diagnostics parameters

— Maintenance parameters

Operating parameters

The following operating parameters can be set manually if required:

Setpoint signal

0 ... 100 % freely selectable for split-range operation

For 4 ... 20 mA and HART version:

— Signal min. 4 mA, max. signal 20 mA (0 ... 100%)

— Min. range 20 % (3.2 mA)

— Recommended range > 50 % (8.0 mA)

Action (setpoint signal)

Increasing:

Position value 0 ... 100 % = direction 0 ... 100 %

Decreasing:

Setpoint signal 100 ... 0% = direction 0 ... 100%

Characteristic curve (travel = f {setpoint signal})

Linear, equal percentage 1:25 or 1:50 or 25:1 or 50:1 or freely

configurable with 20 reference points.

Travel limit

The positioning travel, i.e. the stroke or angle of rotation, can

be reduced as required within the full range of 0 ... 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 respective configured limit value is exceeded, the

shut-off function causes immediate travel of the actuator until

reaching the set end position.

If the value "0" is entered for the corresponding parameter, the

position is further controlled, even in the respective end

position.

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 limits 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 (default)

— Move to 0 % position

— Move to 100 % position

— Hold previous position

— Disable local configuration

— Disable local configuration and operation

— Disable any 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).