Siemens SINAMICS S120 Function Manual page 449

Designations and descriptions for Motion Control
Table 10-34 Time settings and meanings
Name Value
T T_DC_BASE = 4
DC_BASE
T T_DC_MIN = 4
DC
T_DC_MAX = 32
T -
CACF
T -
CA_Valid
T -
CA_Start
T T_IO_BASE =
IO_BASE
125000
T T_IO_InputMIN = 3
IO_Input
T T_IO_OutputMIN = 2
IO_Output
Dx
R or Rx
1) The values correspond to the device master file gsdml-v2.1-siemens-sinamics-s-cu3x0-20070615.xml
Drive Functions
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
Limit value
1)
-
T_DC_MIN ≤ T_DC ≤
T_DC_MAX
CACF = 1-14
T < T
CA_Valid DC
T > T
CA_Start CA_Valid
T_IO_InputMIN <
T_IO_Input ≤ T_DC
T
IO_InputMIN
T_IO_OutputMIN ≤
T_IO_Output ≤ T_DC
T
IO_OutputMIN
Communication PROFIBUS DP/PROFINET IO
10.3 Communications via PROFINET IO
Description
Time basis for cycle time T
calculation:
T =T_DC_BASE ∙ 31.25 µs = 4 ∙ 31.25 µs =
DC_BASE
125 µs
Cycle time
T = T_DC ∙ T ,T_DC: Integer factor
DC DC_BASE
T = T_DC_MIN ∙ T
DC_MIN DC_BASE
T = T_DC_MAX ∙ T
DC_MAX
IO controller application cycle time
This is the time frame in which the IO controller application
generates new setpoints (e.g. in the position controller
cycle).
Calculation example: T
CACF
2∙500 µs = 1 ms
Time, measured from the beginning of the cycle, at which
the actual values of all IO devices for the controller
application process (position control) are available.
Time, measured from the beginning of the cycle, at which
the controller application process (position control) starts.
Time base for T , T
IO_Input IO_Output
T =T_IO_BASE ∙ 1 ns= 125000 ∙ 1ns = 125 µs
IO_BASE
Time of actual value acquisition
This is the time at which the actual values are acquired
before a new cycle starts.
T = T_IO_Input ∙ T
IO_Input IO_BASE
T_IO_Input: integer factor
Minimum value for T
IO_Input
Calculation: T = T_IO_InputMIN ∙ T
IO_InputMIN
Time of setpoint transfer
This is the time, calculated from the beginning of the cycle,
at which the transferred setpoints (speed setpoint) are
accepted by the closed-loop control system.
T = T_IO_Output ∙ T
IO_Output
T_IO_Output: integer factor
Minimum value for T
IO_Output
Calculation: T = T_IO_OutputMIN ∙ T
IO_OutputMIN
250 µs
Data_Exchange
This service is used to implement user data exchange
between IO controller and IO device 1 - n.
Processing time for speed or position controller
DC
= 4∙125 µs = 500 µs
= 32∙125 µs = 4 ms
DC_BASE
= CACF∙ T_DC=
IO_BASE
IO_BASE
IO_BASE
= 375 µs
=
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