Samson 3780 series, Mounting And Operating Instructions

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Mounting position
(linear actuator)
An arrow is located on the cover plate of the positioner, which is used for alignment on the
actuator. This arrow must either point toward the actuator (direct attachment) or away from
the actuator (NAMUR attachment). Exception: Control valves for which the seat is solely
closed by a retracting actuator stem. In this case, the arrow must point either away from the
actuator (direct attachment) or toward the actuator (NAMUR attachment).
For rotary-type (part-turn) actuators, this parameter is omitted.
States:
Default (coldstart) value:
Arrow pointing toward the actuator / Arrow pointing away from the actuator.
Integral attachment: Arrow pointing toward the actuator.
NAMUR attachment: Arrow pointing away from the actuator.
MSR no. Text for instrument identification in connection with the installation of the field device. This
text can be used by the user in any way. Each field device is recommended to be assigned a
unique MSR no.
Length: 8 characters.
For IBIS devices
→
bus identification.
Nominal angle Nominal working range of the valve.
Range:
Default (coldstart) value:
0.0 degrees to 360.0 degrees
60.0 degrees
Nominal travel Nominal working range of the valve.
Range:
Default (coldstart) value:
0.0 mm to 255.0 mm
15.0 mm
Number of (request)
preambles
Number of preambles required from the control station requested by the field device.
Operating direction of
position transmitter
Determines the operating direction of the optional position transmitter.
States:
Default (coldstart) value:
>>, Increasing controlled variable causes increasing output signal.
<>, Increasing controlled variable causes decreasing output signal .
>>
Operating mode Determines whether the reference variable is specified via the analog current signal
(automatic) or via the digital communication (manual). The manual/automatic transfer is
smooth.
States:
Default (coldstart) value:
Default (warmstart) value:
Automatic - The reference variable is specified via the analog current signal.
Manual - The reference variable is specified via the digital communication by entering
w_manual.
Fail-safe - The valve moves in the fail-safe position.
Fail-safe position
Automatic
Plant identification Text stored in the field device. Length: 16 characters
For non-IBIS devices
→
description
Polling address Address used by the control station to identify a field device. Changeable by the user: 0 for
point-to-point, 1 to 15 for multidrop communication.
EB 8380-1 EN
47
List of parameters
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