Commissioning
4.3 Creating a STEP 7 project
Connecting SIMOVERT MASTERDRIVES MC to the Technology-CPU
22 Product Information, 03/2008, A5E00272072-05
SIMOVERT MASTERDRIVES Motion Control
Parameter: P340 (pulse frequency)
Meaning:
The pulse frequency must be matched to the DP cycle so that the converter/inverter can be
synchronized with this. Frequencies from 5 to 8 kHz can be set.
The following value should be set for the pulse frequency:
P340 = 2
task
/DP cycle time
This results in the following relationships between DP cycle time, pulse frequency and task:
DP cycle time Pulse frequency Task
1.5 ms 5.3 kHz 3 (only possible with Motion
Control Performance 2)
2 ms 8 kHz 4
3 ms 5.3 kHz 4
This means, for a DP cycle of e.g. 3 ms, the pulse frequency P340 = 5.3 kHz. In this case,
the restriction for pulse frequencies greater than 5.0 kHz should be taken into account as
described under Chapter 2.2 (Section, Motion control)!
In the window for the CPU 317T, the pre-set value of 5.0 kHz is overwritten with 5.3 kHz in
order to implement a DP cycle of 3 ms. Now, 3.019 ms is displayed as basis time:
Figure 4-9 Adapting the pulse frequency
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