Siemens SITRANS VP300 Operating Instructions Manual page 86

Operate
6.2 Parameter description
Purpose:
Description:
"2.4.1.3 Setpoint rate up"
Requirements:
Factory setting:
Setting range:
Purpose:
"2.4.1.4 Setpoint rate down"
Requirements:
Factory setting:
Setting range:
Purpose:
"2.4.1.5 Characteristic"
Factory setting:
Setting options:
Purpose:
Description:
84
To suppress rapid changes of the setpoint.
The setpoint rate is effective in automatic mode and limits the speed
of change of the effective setpoint.
When switching from manual mode to automatic mode, the setpoint
rate adjusts the effective setpoint to the setpoint on the positioner.
This smooth switchover from manual mode to automatic mode
prevents excessive increases in pressure in long pipelines.
"2.4.1.3 Setpoint rate up" (Page 84)
"2.4.1.4 Setpoint rate down" (Page 84)
The "On" option is set in the "2.4.1.2 Limiting setpoint rate" (Page 83)
parameter.
100.0 %/s
0.1 ... 100.0 %/s
To suppress rapid changes of the setpoint.
The "On" option is set in the "2.4.1.2 Limiting setpoint rate" (Page 83)
parameter.
100.0 %/s
0.1 ... 100.0 %/s
To suppress rapid changes of the setpoint.
Linear
 Linear
 1:25
 1:33
 1:50
 1:25 inverse
 1:33 inverse
 1:50 inverse
 Free characteristic curve
To linearize non-linear valve characteristic curves.
Use this parameter to linearize non-linear valve characteristic curves.
Any flow characteristics can be simulated by linear valve
characteristic curves.
SITRANS VP300 with or without HART
Operating Instructions, 03/2011, A5E01258666-03