Samson foundation 3787, Mounting And Operating Instructions, Page: 34 / 96

MAX_HUB
Maximum travel/angle of rotation in per-
cent of the rated travel/nominal angle.
The integrated LEDs and the parameters
SELF_CALIB_STATUS
SELF_CALIB_WARNUNG
indicate if the initialization has been suc-
cessfully completed or whether errors have
occurred.
4.5.2 Testing the control valve
Upon successful initialization, you can eas-
ily test the control valve using TROVIS-
VIEW software. This function allows you to
run the valve for test purposes without the
use of a complex fieldbus system and with-
out requiring knowledge about the function
blocks and their configuration.
Proceed as follows:
1. Set the Transducer Block to
"Local override" mode:
In the menu "Positioner-> Operating
mode TRD" under "Required operating
mode" select "Local override (LO)".
Deactivate the option "Fail safe position
(O/S)".
2. Defining a positioning value:
In the menu "Positioner-> Process
data", you can select a positioning
value for the valve over "Positioning
value TRD" (FINAL_VALUE).
Note that the status of the positioning
value must be set to "Good".
The position feedback can be retrieved
via "Current valve position"
(FINAL_POSITION_VALUE).
3. Set the Transducer Block to the "Auto"
mode.
In the menu "Positioner-> Operating
mode TRD" under "Required operating
mode" select "Automatic (AUTO)".
Deactivate the option "Local override
(LO)".
4.6 Setting the inductive limit swit-
ches
The positioner version with inductive limit
switches has two adjustable tags that are
mounted on the shaft of the positioner lever
and operate the associated proximity switches.
For operation of the inductive limit switches,
the corresponding switching amplifiers have
to be connected to the output. If the tag is in
the inductive field of the switch, the switch
assumes a high resistance. If the tag is out
of the field, the switch assumes a low resist-
ance.
Normally, the limit switches are adjusted
such that they will provide a signal in both
end positions of the valve. These switches,
however, can also be adjusted to indicate
intermediate valve positions.
The desired switching function, i.e. whether
the output relay shall be picked up or re-
leased when the tag has entered the field,
has to be selected, if necessary, at the
switching amplifier.
34
EB 8383-1 EN
Operation