Electro-Pneumatic Positioner TZIDC, TZIDC-1x0, TZIDC-2x0

1.4 Target groups and qualifications

Installation, commissioning, and maintenance of the product may only be performed by trained specialist personnel who have been authorized by the plant operator to do so. The specialist personnel must have read and understood the manual and comply with its instructions. Prior to using corrosive and abrasive materials for measurement purposes, the operator must check the level of resistance of all parts coming into contact with the materials to be measured. ABB Automation Products GmbH will gladly support you in selecting the materials, but cannot accept any liability in doing so. The operators must strictly observe the applicable national regulations with regards to installation, function tests, repairs, and maintenance of electrical products.

1.5 Explosion protection

Depending on the type of explosion protection, one of the following name plates is attached to the left of the positioner beside the main name plate. It shows the explosion protection and the unit's relevant EX certificate. More detailed information about the device can be found under "Certificates" in the appendix to the operating instructions.

Warning - General risks!

Observe the units' relevant technical data and special conditions in accordance with the applicable certificate.

The positioner has two operating levels: Operating level On the operating level the positioner operates in one of four possible operating modes (two for automatic control and two for manual mode). Parameters cannot be changed or saved on this level. Configuration level On this level most of the parameters of the positioner can be changed locally. The PC is required to change the limit values for the movement counter, the travel counter, and the userdefined characteristic curve.

Caution - Risk

During external configuration via a PC, the positioner no longer responds to the setpoint current. Prior to external configuration, always move the actuator to the safe position and activate manual adjustment.

To simplify operation, the parameters have been categorized into parameter groups through which you can navigate by means of push buttons (see the section titled "Displays and operating elements"). On the configuration level the active operating mode is deactivated. The I/P module is in neutral position. The control operation is inactive. See the chapter titled "Configuration" for a detailed description of the individual parameter groups and parameters.

Displays and operating elements

Positioners can be operated locally by means of four push buttons and a liquid crystal display.

Liquid crystal display

The liquid crystal display, with 160 segments, has been specially designed for the positioner.

Important

The display has been designed for a temperature range of -25 °C ... 80 °C. At temperatures outside this range the display is too sluggish and will be switched off.

Value display with unit

This 7-segment display with four digits indicates parameter values or parameter reference numbers. For values, the physical unit (°C, %, mA) is also displayed.

Designator display

This 14-segment display with eight digits indicates the designators of the parameters with their status, of the parameter groups, and of the operating modes

Push buttons

The four push buttons ENTER, MODE, ↑ and ↓ are pressed individually or in certain combinations according to the function desired.

Basic functions

Functions on the operating level Changing the mode (operating level)

1. Press and hold MODE. The reference number (top) and the designator (bottom) of the active mode are displayed. 

2. Additionally, press or until the reference number and the designator of the desired mode are shown on the display. 

3. Release the buttons

Important The desired mode is only activated and saved in the non-volatile memory once the MODE button is released.

Adjusting the contrast (operating level)

1. Press and hold the ENTER button. After approx. 1.5 seconds the display switches to the contrast value. 

2. Additionally, press or to change the contrast. The value selected is active immediately so that you can check the contrast in the display. 

3. Release the buttons. Once the ENTER button is released, the value is saved in the nonvolatile memory.

Switching to the configuration level

1. Simultaneously press and hold the or buttons. 2. Press ENTER once and release it again. Press and hold ↑ and ↓ until the countdown from 3 to 0 is complete (duration: approx. 3 seconds).

Important If you release the direction buttons before the countdown is complete, the configuration level will not be activated.

3. Release the or buttons. The configuration level appears. The first parameter (ACTUATOR) of group 1 (STANDARD) is displayed. The configuration symbol is also shown on the display.

Functions on the configuration level Switching to another parameter group

1. Simultaneously press and hold the MODE and ENTER buttons. The display indicates the reference number (top) and the designator (bottom) of the current parameter group of the positioner. 2. Additionally, press or until the reference number and the designator of the desired parameter group are displayed. 3. Release all buttons. The first parameter of the newly selected parameter group is displayed. The desired parameter can be adjusted within the group.

Selecting a parameter within a group

1. Press and hold MODE . The display indicates the reference number (top) and the designator (bottom) of the current parameter. 2. Additionally, press or until the reference number and the designator of the desired parameter are displayed. 3. Release all buttons. The display indicates the value of the selected parameter (top). At the bottom the designator is still shown. For parameters that can assume different states (e.g., ACTIVE or INACTIVE) the reference number is displayed at the top and the state at the bottom. The value/state of the parameter can be changed.

Changing a parameter

1. Press or until the desired value or state is shown.

Important

When keeping the respective direction button pressed, parameters with values are changed dynamically. The change rate is increased every second until the limit value of the parameter is reached.

Saving data and exiting the configuration level 1. Select the EXIT parameter for the respective parameter group and set it to one of the two possible states using or : NV_SAVE Activates your changes and saves them in the non-volatile memory. The positioner returns to the operating level. CANCEL Changes are discarded. The positioner returns to the operating leve

Important

The parameters are only saved in the non-volatile memory by leaving the configuration level via EXIT -> SAVE. Multiple parameters in different groups can also be changed sequentially. When leaving the last parameter group via EXIT -> SAVE, all previously made modifications are saved and applied

2. Press and hold ENTER until the displayed countdown from 3 to 0 is complete. 

3. Release the ENTER button. The positioner returns to the operating level. The configuration level was accessed from this mode. Depending on the selection the data is saved in the non-volatile memory or discarded. During the save operation a plausibility check is performed. If an error occurs during the check or while data is being saved, an error message is displayed (see the chapter titled "Error messages").

Starting an action

1. Press and hold ENTER until the displayed countdown from 3 to 0 is complete. 

2. Release the ENTER button. The selected action is started.

Important

If you release ENTER before the countdown is complete, the action will not be started.

To acknowledge a message

During the course of some actions (e.g., Autoadjust) messages are displayed that have to be acknowledged. Messages that must be acknowledged are identified by the value display (top line) being empty (see adjacent example).

Acknowledgement

1. Briefly press ENTER. The positioner continues with the action and/or finishes the procedure correctly

To cancel an action 1. Briefly press ENTER . The positioner aborts the action in progress (e.g., Autoadjust).

Operation on the operating level

On the operating level, the positioner works in the selected operating mode. There are four operating modes:

• 1.0 CTRL_ADP (adaptive control)

• 1.1 CRTL_FIX (fixed control)

• 1.2 MANUAL (manual adjustment within the stroke range)

• 1.3 MAN_SENS (manual operation within the sensor range)

For details regarding switching between the modes, refer to the section titled "Functions on the operating level". When the 4 ... 20 mA signal is fed in, the positioner automatically starts up in the mode that was last active. Devices from the factory start up in operating mode 1.3. This also applies to devices that have been reset to the factory setting. In both manual modes, the valve can be adjusted manually by pressing or . The two automatic control modes are indicated by the control loop symbol in the display. For the manual modes the hand symbol is shown in the display.

Inhibiting operation

Positioner operation can be inhibited completely or partially via the digital input and the FUNCTION parameter in parameter group 10 (DIG_IN (digital input)). This allows the user to prevent or restrict operating actions of unauthorized personnel as desired. When operation is disabled in this way, the key symbol is indicated in the display. The following levels of configuration locks are possible: Inhibiting the local configuration Local operation on the operating level and remote operation and configuration via a PC are still possible. Inhibiting all local operating functions No local operating actions can be executed. Both the operating level and the configuration level are locked. Remote operation and setting of parameters via a PC is still possible. Inhibiting local operation and remote configuration It is not possible to operate or configure the positioner locally or configure it using a PC.

Important

This inhibit function can only be deactivated when a voltage of 12 ... 24 V is applied at the digital input of the positioner (see Function selection in parameter group 10).

Parameter group 7: Control parameters

KP UP – KP value (up)

Important

All control parameters are determined in an optimum way for most actuators during Autoadjust. Changes should only be made when Autoadjust cannot be executed or control stability cannot be achieved. The KP value is the gain of the controller. The control speed and stability are influenced by the KP value. With higher KP values, the controlling speed increases.

Important

The control precision is not affected by the KP value. To compensate for existing dissymmetries in the controlled system, the KP value should be set separately for both directions (up / down). For most actuators, a satisfactory control response is achieved with a KP value in the 2.0 ... 10.0 range. You can use parameter KP UP to adjust the KP value for the positioning direction up (towards 100 %).