West Control Solutions KS 45 - Manual (Page 35)

. 7 Controlling
7.1 Setpoint processing
The setpoint effective for control can come from different sources. The setpoint processing structure is shown in the
following picture:
* Explanations:
Ü Switching internal/ external setpoint
* Configuration SP.Fn
Ö Switching SP / SP.2
g
The ramp starts at the process value with the following switches:
– Switching internal/ external setpoint
– Switching
SP / SP.2
– Switching automatic/manual
– at power on
Setpoint/ ext. setpoint
With a Setpoint/ ext. setpoint you can switch between internal setpoint SP and external setpoint SP.E. The signal for
switching is determined in the configuration LOGI/SP.E.
Setpoint with external offset
With a setpoint with external offset control, the internal setpoint SP determines the actual default setpoint.
It can be influenced by the external (additive) offset.
Programmer
With controlling via programmer the setpoint is determined by the internal programmer.
Programmer with external offset
With controlling via programmer with external offset the setpoint is determined by the internal programmer.
The programmer value can be influenced by the external (additive) offset.
Timer
The effective setpoint is determined by the timer depending on the chosen timermode (see chapter timer).
Controlling
KS 45 35 Setpoint processing
2
3
1
4
5
6
7
0
Ü
Xeff
SP.2
SP.E
0/4...20 mA
internal set-point
*
Ö
SP.Hi
SP.Lo
r.SP
external
set-point
INP2
limiting
ramp
2. set-point
effective
set-point
{
ù
programmer
timer
1 2 M E
ok
err
450.6
Ь
+
8
+
9