Efficient Networks S120 manual Designations and descriptions for Motion Control, Tdcbase =, Tdcmax

			Communication PROFIBUS DP/PROFINET IO
			10.3 Communications via PROFINET IO
Designations and descriptions for Motion Control
Table 10-34 Time settings and meanings
Name	Value1)	Limit value	Description
TDC_BASE	T_DC_BASE = 4	-	Time basis for cycle time TDC
			calculation:
			TDC_BASE =T_DC_BASE ∙ 31.25 µs = 4 ∙ 31.25 µs =
			125 µs
TDC	T_DC_MIN = 4	T_DC_MIN ≤ T_DC ≤	Cycle time
	T_DC_MAX = 32	T_DC_MAX	TDC = T_DC ∙ TDC_BASE ,T_DC: Integer factor
			TDC_MIN = T_DC_MIN ∙ TDC_BASE = 4∙125 µs = 500 µs
			TDC_MAX = T_DC_MAX ∙ TDC_BASE = 32∙125 µs = 4 ms
TCACF	-	CACF = 1-14	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: TCACF = CACF∙ T_DC=
			2∙500 µs = 1 ms
TCA_Valid	-	TCA_Valid < TDC	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.
TCA_Start	-	TCA_Start > TCA_Valid	Time, measured from the beginning of the cycle, at which
			the controller application process (position control) starts.
TIO_BASE	T_IO_BASE =		Time base for TIO_Input, TIO_Output
	125000		TIO_BASE =T_IO_BASE ∙ 1 ns= 125000 ∙ 1ns = 125 µs
TIO_Input	T_IO_InputMIN = 3	T_IO_InputMIN <	Time of actual value acquisition
		T_IO_Input ≤ T_DC	This is the time at which the actual values are acquired
			before a new cycle starts.
			TIO_Input = T_IO_Input ∙ TIO_BASE
			T_IO_Input: integer factor
		TIO_InputMIN	Minimum value for TIO_Input
			Calculation: TIO_InputMIN = T_IO_InputMIN ∙ TIO_BASE = 375 µs
TIO_Output	T_IO_OutputMIN = 2	T_IO_OutputMIN ≤	Time of setpoint transfer
		T_IO_Output ≤ T_DC	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.
			TIO_Output = T_IO_Output ∙ TIO_BASE
			T_IO_Output: integer factor
		TIO_OutputMIN	Minimum value for TIO_Output
			Calculation: TIO_OutputMIN = T_IO_OutputMIN ∙ TIO_BASE =
			250 µs
Dx			Data_Exchange
			This service is used to implement user data exchange
			between IO controller and IO device 1 - n.
R or Rx			Processing time for speed or position controller

1) The values correspond to the device master file gsdml-v2.1-siemens-sinamics-s-cu3x0-20070615.xml

Drive Functions	449
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4