Operate
6.2 Parameter description
SITRANS VP300 with or without HART
Operating Instructions, 03/2011, A5E01258666-03
73
Purpose:
To set the lower target position for tight closing.
Description:
Use this parameter to set the value for the lower tight closing
position. Once this position is reached, the valve moves into the valve
seat with the maximum actuator force. The tight closing function has
a fixed hysteresis of 1%. The value of the tight closing limit must
always be smaller than the value of the upper tight closing limit. Unit
in %.
"2.1.4 Upper tight closing limit" (Page 73)
"2.1.4 Upper tight closing limit"
Requirements:
The respective setting for the tight closing function is activated.
"2.1.2 Tight closing" (Page 72)
Factory setting:
99.5 %
Setting range:
-10.0 ... 110.0 %
Purpose:
Specifying the target position for tight closing at top.
Description:
Use this parameter to set the value for the upper tight closing position.
Once this position is reached, the valve moves into the valve seat with
the maximum actuator force. The tight closing function has a fixed
hysteresis of 1%. The value of the tight closing limit must always be
smaller than the value of the upper tight closing limit. Unit in %.
"2.1.3 Lower tight closing limit" (Page 72)
"2.1.5 Lower travel range limit"
Factory setting:
0.0 %
Setting range:
0.0 ... 100.0 %
Purpose:
Specifying the lower limit for the adjustable actuator travel.
Description:
Use this parameter to limit the adjustable actuator travel. This allows
the adjustable travel range of the actuator to be restricted to the
effective flow and the integral saturation of the master controller to be
prevented. The value of the lower travel range limit must always be
smaller than the value of the upper travel range limit.
"2.1.6 Upper travel range limit" (Page 74)
