9.2.2 Reference Percentage
The following signal sources are available for determining the reference percentage:
The reference line value with the parameter name
sent to the frequency inverter via the bus.
The internal reference value reaches the frequency inverter via the reference percent-
age channel. The reference percentage channel is configured via parameter
Percentage Source
The parameter
The internal reference value from the reference percentage channel and the reference
line value are fed to the ramp as an added variable. The sum of the two variables has
a positive or a negative sign according to the mathematical operation.
For information on the reference percentage channel, refer to the frequency inverter
operating instructions.
Note:
Note:
05/08
05/08
−
External reference value as reference line value from bus
Internal reference value from the reference percentage channel
−
476.
Reference Percentage Value
Reference line value
of Bus
Reference Percentage
RAM
524
Internal reference
value of reference
percentage channel
−
The actual value parameter
at the frequency inverter via the control unit KP500 or the control
software VPlus.
−
For example, the
frequency inverter via the functions "Technology Controller" or
"Torque Controller" (e.g. speed controller for torque limitation. For
more information refer to the frequency inverter operating instruc-
tions.
If the serial interface of the module CM-232/CM-485 is connected to a
PLC, for example, VPlus cannot access the frequency inverter via this in-
terface directly.
In this case, the PC must be connected via the optional interface adapter
KP232.
Modbus Instruction manual
Modbus Instruction manual
Reference Percentage RAM
229 can be read back as an actual value.
Rampfunction
+
%max
+
Reference percentage
Reference Percentage Value
Reference
Ramp
Reference percentage
channel 229
229 can be checked
229 is processed in the
524 is
65
65
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