Siemens SIMATIC S7 System Manual page 74

97BPLC concepts
4.1 Execution of the user program
Table 4- 5 Range for the cycle time
Cycle time
Maximum scan cycle time
Fixed minimum scan cycle time
The maximum scan cycle time is always enabled. Configure a cycle time between 1 ms to 6000 ms. The default is 150
1
ms.
The fixed minimum scan cycle time is optional, and is disabled by default. If required, configure a cycle time between 1
2
ms and the maximum scan cycle time.
Configuring the cycle time and communication load
You use the CPU properties in the Device configuration to configure the following
parameters:
● Cycle time: You can enter a maximum scan cycle time. You can also enter a fixed
● Communications load: You can configure a percentage of the time to be dedicated for
For more information about the scan cycle, see "Monitoring the cycle time". (Page 73)
74
1
2
minimum scan cycle time.
communication tasks.
Range (ms)
1 to 6000
1 to maximum scan cycle time
Default
150 ms
Disabled
S7-1200 Programmable controller
System Manual, 11/2011, A5E02486680-05