
11.3.2
Reference value/actual value
The controller (PLC) can define the reference frequency for the frequency inverter via
parameter
Reference frequency RAM [Hz]
484 and receive the actual value via parame-
ter
Actual speed
240.
In the reference frequency channel, via parameter
Reference frequency source 1
475 or
Reference frequency source 2
492, you can select setting “20 – Field bus reference val-
ue”.
Actual values
Parameters
Contents
Format
Internal reference fre-
quency
228
Internal reference value from the reference
frequency channel
xxx.xx Hz
Bus reference frequency
282
Reference line value from Field bus
xxx.xx Hz
Ramp reference frequency
283
= sum of internal reference fre
reference line value
xxx.xx Hz
The reference value for the frequency inverter from parameter
Reference frequency RAM
[Hz]
484 is connected to the reference line value. This reference value will be combined
with the internal reference value from the reference frequency channel and directed to
the ramp. For information on the reference frequency channel, refer to the operating
instructions of the frequency inverter.
internal
set point
refer to note
frequency
ramp
fmax
fmin
0
1
+
line
set point
operation mode
434
ramp set point
The internal reference value from the reference frequency channel and the reference line
value can be led to the ramp individually or as an added variable. The operation mode of
the ramp function is set via the data set switchable parameter
Reference ramp
434.
Reference percentage
524 can be used for regular changing of reference percentages,
e.g. as a reference value for technology controllers or as a reference torque.
Parameters
Settings
No.
Description
Min.
Max.
Factory set-
ting
434 Ramp Setpoint
1
3
3
484 Reference frequency RAM [Hz]
-999.99
999.99
0.00
524 Reference percentage RAM [%]
-300.00
300.00
0.00
Operation mode 434
Function
1 - Internal reference frequen-
cy
The internal reference frequency is determined from
the reference frequency channel.
2 - Reference line value
The reference value is supplied externally via the bus
3 - Internal reference frequen-
cy + reference line value
Addition (considering the sign) of internal reference
frequency and reference line value
12/13
Agile
VABus/TCP
59
Summary of Contents for Agile VABus/TCP
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