ABB TZIDC-220 Operations monitoring parameters

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.:

• Internal positioning time-out

• Sensor monitoring

• Backup monitoring

While automatic commissioning is in progress, the current

state is continuously indicated on the integrated LCD

indicator. Remaining messages can be retrieved via the user

interface.

The fieldbus enables users to implement enhanced

monitoring in the control system. A special window displays

the most important process variables ONLINE, e.g. the

setpoint signal (in %), the position (in %), the control

deviation (in %) as well as the status messages.

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 diagnostic parameters and limit values can be called up,

set and reset 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