Siemens Sinamics S110 Function Manual page 303

Hardware sampling times, number, and assignment
During configuration, note that the number of hardware sampling times (1 ms ≤ time period
T_sampling < r20003 - r20002) used by the basic SINAMICS system and "free function
blocks" is restricted as follows:
● SINAMICS S110 → no. of hardware sampling times = 11
The assignment of the available hardware sampling times is displayed in r20008[0...12] as
follows (STARTER/SCOUT: in online mode only):
● Value = 0.0 → sampling time not assigned
● Value ≠ 0.0 (not equal to 0.0) → sampling time in ms
● Value = 9999900.00000 → sampling time not supported
Hardware sampling times, usage
A sampling time can be used simultaneously by more than one runtime group of "free
function blocks" and the basic SINAMICS system.
For this reason, the runtime groups should ideally be registered to existing sampling times or
- if it makes more sense due to the function - the fixed runtime group "Calculate before
setpoint channel" should be used.
For internal purposes, the drive unit always requires at least two free hardware sampling
times, This is why the current number of free hardware sampling times can be read in r7903.
Function Manual
Function Manual, 01/2011, 6SL3097-4AB10-0BP3
Note
Note that a long-term trace registers a sampling time of 2 ms and the trace registers
sampling times in accordance with the selected trace clock cycle. If these sampling times
have not already been registered by the basic SINAMICS system or "free function blocks"
(FBLOCKS), these functions require additional free hardware sampling times.
The registered hardware sampling times can be read (if the FBLOCKS are activated) in
r20008[0...12]. The current number of free hardware sampling times can be read in
r7903.
Drive functions
7.3 Function modules
301