Siemens SIMATIC IM 151/CPU User Manual

Cycle and Response Times
7-5
ET 200S Interface Module IM 151/CPU
A5E00058783-01
Delay of the Inputs and Outputs
You have to take into account the following delay times, depending on the
expansion module:
 For digital inputs: The input delay time
 For digital outputs: Negligible delay times
 For analog inputs: Cycle time of the analog input
 For analog outputs: Response time of the analog output
Extending the Cycle by Nesting Interrupts
Table 7-5 shows typical extensions of the cycle time through nesting of an
interrupt. The program runtime at the interrupt level must be added to these. If
several interrupts are nested, the corresponding times need to be added.
Table 7-5 Extending the Cycle by Nesting Interrupts
Interrupts
IM 151/CPU
Process interrupt Approx. 480 s
Diagnostic interrupt Approx. 700 s
Time-of-day interrupt Approx. 460 s
Delay Interrupt Approx. 370 s
Watchdog Interrupt Approx. 280 s
Programming/access error/runtime system error Approx. 560 s

Siemens SIMATIC IM 151/CPU Specifications

General

Brand	Siemens
Model	SIMATIC IM 151/CPU
Category	Control Unit
Language	English