Commissioning Sequence - Siemens SINAMICS S120 Installation And Start-Up Manual

7.7.3

Commissioning sequence

Parameter p0110 is used to set the basic clock cycles in the drive; all connected
components are governed by this basic sampling time. This parameter can only be
changed when p0009=1.
All the components connected to a Control Unit DRIVE-CLiQ line must be set to
the same basic sampling time (p0111 when p0009=3).
The sampling times for:
S Current controller
S Speed controller
S Flux controller
S Setpoint channel
are set by selecting the appropriate values in p0112 for the closed-loop control
configuration and are copied to p0115 depending on the performance levels
required. The performance levels range from xLow to xHigh. The clock cycles must
be integer multiples of the basic clock cycle.
Presetting the basic sampling times
Once they have been downloaded to the Control Unit, the basic sampling times
(p0110[0..2]) are defaulted as follows:
S When the current controller sampling times (p0115[0]) of the drives are
identical, the basic sampling times (p0110[0..2]) are set to these.
S When the current controller sampling times are different:
– p0110[0] is set to the shortest current controller sampling time
(in vector mode: to the longest current controller sampling time)
– p0110[1] is set to 250 µs when p0110[2]  250 µs
(otherwise it is set to p0110[2])
– p0110[2] is set to the longest current controller sampling time
Notice
One exception here is presetting the basic sampling time (p0110[2]) in vector
mode. When the number of drives is more than two (vector control) or four (vector
V/f), p110[2] is set to 400 µs.
E Siemens AG, 2004. All rights reserved
SINAMICS S120 Installation and Start-Up Manual, 12/04 Edition
Basic Information about the Drive System
System sampling times
7-253