Samson 4785, Монтаж и эксплуатация

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Operating mode,
required/valid
MODE_BLK/TARGET-MODE
Positioner operating mode
Up to Firmware version K 1.20: OS, A UTO
Firmware version K 1.30 and higher: OS, LO, MAN, AUTO
Positioner operating modes:
Automatic (AUTO):
In this operating mode, the positioner follows the cyclic or
acyclic set point entered via the parameter SP (w) according to the scale and unit
entered via PV_SCALE (reference variable range).
Manual (MAN): In this operating mode, the positioner also follows the set point
entered via the parameter SP (w) according to the scale and unit entered via
PV_SCALE (reference variable range).
The parameter INCREASE_CLOSE (operating direction), however, is not processed.
Communication monitoring parameters (FSAFE_TIME, _TYPE, _VALUE) are also not
processed.
Local override (LO): In this operating mode, the positioner follows the acyclic set
point entered via the parameter OUT (correction value) according to the scale and
unit (mm or degrees) entered via OUT_SCALE (travel/angle of rotation range).
With the characteristic deactivated, this value corresponds to the actual valve
position in mm or degrees. The parameter INCREASE_CLOSE (operating direction),
however, is not processed. Communication monitoring parameters (FSAFE_TIME,
_TYPE, _VALUE) are also not processed.
Out of service (OS): Fail-safe operating mode. The valve is automatically moved to
fail-safe position.
Remote cascade (RCAS): In this operating mode, the positioner follows the cyclic set
point entered via the parameter RCAS_IN (w_rcas) according to the scale and unit
entered via PV_SCALE (reference variable range).
Operating mode during start-up (warm start)
The response of the positioner to a warm start is determined by the parameter
FSAFE_TYPE (fail-safe action).
If FSAFE_TYPE is set to "adjust to fail-safe value", the positioner switches to automatic
operating mode and adjusts to the value determined by the parameter FSAFE_VALUE.
If FSAFE_TYPE is set to "adjust to last set point value" or "fail-safe position determined
by spring action", the device remains in fail-safe position. As soon as a valid set point
SP is transmitted to the positioner, the operating mode changes to automatic.
If the status of the transmitted set point is "bad" (value < 64) or the positioner has not
been successfully initialized, it remains in fail-safe position (out of service).
60
EB 8382-2 EN
List of parameters