Siemens SIMATIC ET 200S - Setting the Base Frequency

1STEP 5V/204kHz
2.5 Fundamentals of Positioning
ET 200S Positioning
Operating Instructions, 05/2007, A5E00124871-04
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2.5.4 Setting the Base Frequency
Introduction
Through parameter assignment, the 1STEP 5V/204kHz permits the base frequency to be set
in steps.
The base frequency sets the range for the start-stop frequency, the output frequency, and
the acceleration.
Procedure
1. Depending on the priority of your request, select one of the three columns from the
following table:
– Range for the start-stop frequency F
ss
,
for example, for starting and stopping as soon as possible
– Range for the output frequency F
a
,
for example, for a velocity setting that is as precise as possible
– Range for the maximum acceleration a,
for example, for the fastest possible positioning operations
2. Use the table to determine the base frequency F
b
.
To optimize the base frequency F
b
proceed as follows:
3. Check whether the other corresponding values meet your requirements. If necessary,
select another base frequency F
b
, which meets your requirements better.
4. Define the multipliers required to set the output frequency F
a
, the acceleration/delay a,
and the start-stop frequency F
ss
.