Siemens SITRANS VP300 Operating Instructions Manual page 69

"1.3.2 Actuator direction"
Factory setting:
Setting options:
Purpose:
Description:
"1.3.3 Tight closing"
Factory setting:
Setting options:
Purpose:
Description:
SITRANS VP300 with or without HART
Operating Instructions, 03/2011, A5E01258666-03
Standard
 Standard
 Inverted
Input of direction in which the actuator is moving if the actuator is
aerated with actuating pressure Y1 (138).
 Standard: When aerating with Y1, the valve opens
 Inverted: When aerating with Y1, the valve closes
Off
 Off
 Up
 Down
 Up and down
Achieving optimum valve operation.
If the setpoint falls below the value for the lower tight closing limit or
exceeds the value for the upper tight closing limit, the valve is moved
into the valve seat with the maximum actuator force.
The tight closing function is activated on one end or for both end
positions. Make sure that the valve is not damaged when utilizing the
tight closing function. The values for the lower and upper tight closing
limits are factory-set.
The pre-set values can be changed with the following two
parameters:
"2.1.3 Lower tight closing limit" (Page 72)
"2.1.4 Upper tight closing limit" (Page 73)
Operate
6.2 Parameter description
67