Setting Sampling Times - Siemens SINAMICS S120 Function Manual

Basic information about the drive system
13.10 System rules, sampling times and DRIVE-CLiQ wiring
Setting the pulse frequency with the STARTER in online operation
Enter the minimum pulse frequency in p0113. For isochronous operation (p0092 = 1), you
can only set the parameter so that a resulting current controller cycle with an integer multiple
of 125 μs is obtained. The required pulse frequency can be set after commissioning (p0009 =
p0010 = 0) in p1800.
Table 13- 16 Pulse frequency for isochronous operation
When commissioning is exited (p0009 = p0010 = 0), the effective pulse frequency (p1800) is
appropriately pre-assigned, depending on p0113, and can be subsequently modified.
13.10.3.5

Setting sampling times

If sampling times are required which cannot be set using p0112 > 1, you can directly set the
sampling times in expert mode using p0115.
If p0115 is changed online, then the values of higher indices are automatically adapted.
Note
Do not change the sampling times when STARTER is in offline mode. The reason for this is
that if the parameterization is incorrect, then the project download is interrupted.
Making and checking settings
1. Activate in the expert list of the Control Unit the drive base configuration with p0009 = 3.
2. Activate in the expert list of the drive object the expert mode with p0112 = 0.
3. Specify the current controller cycle for the drive object as follows: p0115[0] = current
controller cycle.
Use for the current controller cycle only values from the "Table 13-18 Pulse frequencies
and current controller cycles for servo control (Page 867) and Table 13-20 Pulse
frequencies and current controller cycles for vector control (Page 868)".
4. Close in the expert list of the Control Unit the cycle setting with p0009 = 0.
A startup is then performed. The speed controller cycle and flux controller cycle are
adapted automatically so that they remain an integer multiple of the current controller
cycle.
5. Then check the maximum speed p1082, the set pulse frequency p1800 and start an
automatic calculation of the controller data (p0340 = 4).
854
Control type
Current controller cycle / µs
Servo control
Vector control
p0115[0]
250
125
500
250
Function Manual, (FH1), 04/2014, 6SL3097-4AB00-0BP4
p0113
Pulse frequency / kHz
2
4
1
2
Drive functions