Functions
5.5 Changing over the command data sets (manual, automatic)
Frequency inverter
102 Operating Instructions, 08.10. 2008, t.b.d.
5.5 Changing over the command data sets (manual, automatic)
Switching operating priority
In some applications, the inverter is operated in different ways.
Example: switchover from automatic to manual operation
A central controller can switch a motor on/off or change its speed either via a fieldbus or via
local switches. A key-operated switch close to the motor can be used to switch the operating
priority of the inverter from "control via fieldbus" to "local control".
Command data set (CDS)
The inverter offers up to three different methods for parameterizing its command and
setpoint sources as well as for switching between these different settings. This function
allows the control priority of the frequency inverter to be changed over as described in the
example above. The parameters for these functions are indicated with the index numbers 0,
1, and 2. Control commands define the switchover between the parameters by selecting one
of these three indices.
The total of all switchable parameters with the same index is known as a "command data
set".
Since all the switchable parameters have the same three indices (0, 1, and 2), the command
and setpoint sources can only be switched together.
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