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Application Manual CDA3000
5 Software functions
Figure 5.15 Selection of reference sources
Note: Selector RSSLx can only be switched by a digital input,
assigned the offset SADDx. Several digital inputs with the off-
set SADDx do not cause repeated feedforward of selector
RSSLx.
Example of reference source switching:
If the digital input ISD00 is set, the reference selector RSSL1 is increased
by the value “3 increments” from parameter 285-SADD1 (see Figure
5.16). If there is a falling edge at input ISD00, the offset is cancelled
again, causing the original reference source to be set.
The reference sources are selected in a
loop, i.e. reference source FMAX is fol-
lowed by reference source FCON if the
offset on reference selector RSLLx
extendsbeyondFMAX.Inthesameway,
reference source FCON is automatically
followed by FMAX if the offset extends
beyond FCON after removal.
210-FIS00 = SADD1 The digital input ISD00 switches the offset value
of parameter 285-SADD1 on/off
285-SADD1 = 3 The offset value of parameter SADD1 has a step-
width of 3 increments
FMAX
FMIN
FFIX
FFTB
FOPT2
FOPT1
FDIG
FCLK
FSIO
FA1
FA0
FCON=0
Activate offset
Reset offset
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