Operating Modes - Samson 3785 series Mounting And Operating Instructions

How to implement a Class 1 PROFIBUS Master

7.5 Operating modes

Possible operating modes
The following operating modes are defined in the AO (Analog Output) profile:
4
Automatic (Auto)
4
Manual (Man)
4
Remote Cascade (RCas)
4
Local Override (LO)
4
Out of Service (OS)
The Type 3785 Positioner supports the following operating modes:
Up to firmware version K 1.20:
Firmware version K 1.30 and higher:
Automatic (Auto) mode
In this operating mode, the positioner follows the set point that is cyclically or acyclically pre-
set by the SP (w) parameter according to the scale and unit preset by PV_SCALE (reference
variable range).
Local Override (LO) or Manual (Man) mode
In these operating modes, the positioner follows the acyclic set point preset by the OUT pa-
rameter (correction value) according to the scale and unit (mm or degrees) entered as
OUT_SCALE (travel/angle of rotation range). With the characteristic deactivated, this value
corresponds to the actual valve position in mm or degrees.
The INCREASE_CLOSE parameter (direction of action), however, is not processed. Neither
are the communication monitoring parameters (FSAFE_TIME, _TYPE, _VALUE) processed.
Remote cascade (Rcas) mode
In this operating mode, the positioner follows the set point cyclically preset by the RCAS_IN
(w_rcas) parameter according to the scale and unit preset by PV_SCALE (reference variable
range).
Out of Service (OS) mode
In this operating mode, the valve is automatically moved to its fail-safe position.
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EB 8382-1 EN
OS, AUTO
OS, LO, MAN, AUTO