The reference value for the frequency inverter from PZD2 is included via the line set
point value. This reference value is combined with the internal set point value from
the reference frequency channel in the input of the ramp function. For the reference
frequency channel, see the operating instructions.
The internal set point value from the reference frequency channel and the line set
point value can be fed to the ramp individually or as an added variable. The setting is
carried out via the data set change-over capable parameter
No.
434 Ramp set point
1 - Internal set point
2 - Line set point
3 - Internal + line set
The reference value can be controlled on the frequency inverter via the KP500 control
unit or the VPlus program.
Note:
Internal reference frequency
Reference bus frequency
Reference ramp frequency
48
48
operation mode 434
0
internal
set point
1
line
set point
Parameter
Description
Operation mode
Reference value from the source percent or frequency ref-
erence value channel
Reference value from the communication interface
Reference sum of internal set point and line set point
point
Ramp set point
If
line value is limited to fmin. Please remember that the sign in front of fmin
at reference value = 0 is derived from the sign in front of the last line set
point value ≠ 0.
After Power on, the reference line value is limited to +fmin !
Ramp set point
For
value results from the sum of internal + line set point value.
Parameter
282
283
CM-PDPV1
ramp set point
fmin
+
Min.
1
Function
434 = 2 (only line set point value), then this reference
434 = 3, the sign in front of the overall reference
Actual values
Content
internal set point value from ref-
228
erence frequency channel
line set point value from Profibus xxx.xx Hz
sum of internal set point value +
line set point value
CM-PDPV1
refer to note
frequency
ramp
fmax
Ramp set point
434.
Setting
Max.
Fact. sett.
3
Format
xxx.xx Hz
xxx.xx Hz
3
08/08
08/08
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