ABB TZID Operating Instructions Manual page 35

To start the Autostroke, proceed as follows
1. Press and hold the "Up" and "Down" buttons simultaneously
2. Wait until the displayed countdown from 3 to 0 is terminated.
3. Release the "Up" and "Down" buttons.
The progress of the Autostroke is continuously indicated by codes that occur in the dis-
play.
Display 2.1 = Tolerance band
In this mode the positioner can be adapted to the dynamic and the hysteresis of the actu-
ator. When this mode is called up, the display first shows the mode number (2.1) for
around 1 second,and then the currently active value.
The adjustable range is between 0.30...10.00 %, the factory setting is 0.3 %. Press the
"Up" or "Down" button to change the setting. Note that the adjustment is done on line, i.e.
the settings are immediately taken over.
The smallest tolerance band value is determined during the Autostroke. Via the operator
panel only higher values can be set, if this should be required to improve stability.
Display 2.2 = Position sensor span
In this mode the actually used angle of rotation or angular range is scanned. When this
mode is called up, the display first shows the mode number (2.2) and then the deter-
mined value.
Normally, the default angle of rotation 0...100 %. is indicated. Do not confound this read-
ing with the 0...100 % display of the stroke. The angle of rotation in % for a stroke of 0 %
and of 100 % can be seen by pressing the "Up" and "Down" buttons. Press both buttons
together for a quick run. Note that the order in which the buttons are pressed determines
the direction.
The scanned values result from the mechanical linkage and the transmission to the shaft
for position feedback.
Display 2.3 = Zero adjustment
In this mode a zero adjustment between the 4...20mA input signal and the 0...100 %
stroke can be performed. When this mode is called up, the display first shows the mode
number (2.3) for around 1 second. Then the position controlled with the currently applied
input signal is shown.
Press the "Up" or "Down" button to set the deviation to "0". Deviation "0" means that the
positioning signal, e.g. 50 % (12 mA) will exactly set the actuator to a position of 50 %.
The adjustment takes place on line, i.e. the adjusted values are immediately active.
IMPORTANT
42/18-54 EN
- When you are returning to operating level 1, you can select eiterh "save
non-volatile" or "no save". Selecting "save non-volatile will save all
parameters permanently, even if the settings have been made in differ-
ent modes. If, however, you choose "no save", none of the parameter
settings made will be saved.
Electro-pneumatic positioner TZID 35