43
4 - Operation
Stored Setpoint
tracking
(see chapter 4.3.2 at page 27)
Two different operation mode
can be set:
A- Stand-by mode
# no
The memorised Setpoint is
active until its command is
active too. Then the controller
goes back to the Local Setpoint
which becomes the operating
one.
B- Tracking mode #yeS
Once the memorised Setpoint is
active, it remains operating also
when it command is not active
anymore.
The previous Local Setpoint
value will be lost.
#S.P.tr
Remote Setpoint Bias and Ratio
bias = 20
ratio = 0.1
ratio = –0.1
Remote
signal
Range
600
100
20
0
Remote
Setpoint span
10V
bias = 100
a b
a´ b´
-200 °C
HR
a (b
´ ) b (a´ )
LR
Remote
Setpoint Ratio
Ratio is the coeff. which defines
the remote Setpoint span with
respect to the input span.
Remote
Setpoint
Bias defines the starting point of
analogue Remote Setpoint in
eng. units corresponding to the
low limit (current or voltage) of
the remote signal.
#bias
#rtio
PV = Process variable
LR = PV low limit
HR = PV high limit
SR = Remote Setpoint
a (a´) = SR starting point
b (b´) = SR ending point
x5-uk-ed5 17-09-2009 14:53 Pagina 43
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