Lenze CANopen control technology - Manual (Page 90)

Control technology | CANopen communication manual
Defining the minimum cycle time of the PLC project
Calculating the minimum cycle time
90
L
DMS 4.2 EN 07/2011 TD17
12.3 Calculating the minimum cycle time
The minimum cycle time T
min
for a system results from the sum of the times detected
before, multiplied by the safety factor:
Example

Note!
A safety factor of 1.5 is included in the calculation of the minimum cycle time.
T
min
> safety factor x ( T
Task utilisation
+ T
Correction
)
Configuration: Industrial PC (ATOM 1.6 GHz) with 9 Motion axes
Detected access time
Result
Calculated correction value T
Correction
620 μs
(80 μs + (9 x 60 μs))
Value read from task configuration: T
Task utilisation
500 μs
Actual required computing time 1120 μs
Minimum cycle time including a safety factor of 1.5 T
min
1680 μs
Actual cycle time 2000 μs