Position Feedback Signal; Functions; Detect Input Signal Failure - Samson 5857 Mounting And Operating Instructions

Annex A (configuration instructions)

16.2 Position feedback signal

The position feedback indicates the position of the actuator stem.
The span of the position feedback signal is adjusted over the lower and upper range value
parameters.
Settings\Inputs and outputs\Position feedback signal
Position feedback signal
Lower range value
Upper range value

16.3 Functions

16.3.1 Detect input signal failure

The positioner detects a failure of the input signal as soon as the value falls below the lower
range value by 0.3 V. An input signal failure is indicated in the 'Service' folder ('Statistics')
as well as by the red LED:
− Input signal failure detected
Note
The input signal failure can only be detected when at least 0.5 V is set as the lower range
value.
If the Input signal failure function is active, the reaction of the actuator upon failure of the in-
put signal is determined by the Positioning value upon input signal failure parameter.
− 'Positioning value upon input signal failure' = Internal
The actuator stem moves to the position specified in the Internal positioning value param-
eter upon failure of the input signal.
16-2
WE Adjustment range
0.0 V 0.0 V to 10.0 V
10.0 V 0.0 V to 10.0 V
On
Off
Time in s
EB 5857 EN