IFM Electronic AC402S Programming Manual page 95

SmartPLC SafeLine AC4S with fieldbus interfaces
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Step 1: Calculate typical response times
► Calculate typical response times of the safety functions of the device:

Without safe cross communication
30 ms +
AS-i input
2*T(SafetyTask) +
15 ms
16 ms +
Local input
2*T(SafetyTask) +
15 ms
32 ms +
FSoE Slave
4*T(MainTask) +
Eingang
4*T(MapTask) +
2*T(SafetyTask) +
15 ms

With safe cross communication (Safety NetVars)
From device 1
30 ms +
AS-i input
2*T(SafetyTask_Dev1) +
4*T(MapTask_Dev1) +
4*T(MainTask_Dev1) + 32 ms +
4*T(MapTask_Dev2) +
4*T(MainTask_Dev2) + 32 ms +
2*T(SafetyTask_Dev2) +
15 ms
16 ms +
Lokaler
2*T(SafetyTask_Dev1) +
Eingang
4*T(MapTask_Dev1) +
4*T(MainTask_Dev1) + 32 ms +
4*T(MapTask_Dev2) +
4*T(MainTask_Dev2) + 32 ms +
2*T(SafetyTask_Dev2) +
15 ms
4*T(MapTask_Dev1) +
FSoE Slave
4*T(MainTask_Dev1) + 32 ms +
Eingang
2*T(SafetyTask_Dev1) +
4*T(MapTask_Dev1) +
4*T(MainTask_Dev1) + 32 ms +
4*T(MapTask_Dev2) +
4*T(MainTask_Dev2) + 32 ms +
2*T(SafetyTask_Dev2) +
15 ms
The formula in the table determine only the typical response time of the device. For the
calculation of the typical process response time the delay times of the safety AS-i
sensors/actuators and the respective input/output devices have to be added additionally
(T(sensor) + T(input) and T(output) + T(aktuator)).
AS-i output
30 ms +
2*T(SafetyTask) +
8 ms
16 ms +
2*T(SafetyTask) +
8 ms
32 ms +
4*T(MainTask) +
4*T(MapTask) +
2*T(SafetyTask) +
8 ms
AS-i output
30 ms +
2*T(SafetyTask_Dev1) +
4*T(MapTask_Dev1) +
4*T(MainTask_Dev1) + 32 ms +
4*T(MapTask_Dev2) +
4*T(MainTask_Dev2) + 32 ms +
2*T(SafetyTask_Dev2) +
8 ms
16 ms
2*T(SafetyTask_Dev1) +
4*T(MapTask_Dev1) +
4*T(MainTask_Dev1) + 32 ms +
4*T(MapTask_Dev2) +
4*T(MainTask_Dev2) + 32 ms +
2*T(SafetyTask_Dev2) +
8 ms
4*T(MapTask_Dev1) +
4*T(MainTask_Dev1) + 32 ms +
2*T(SafetyTask_Dev1) +
4*T(MapTask_Dev1) +
4*T(MainTask_Dev1) + 32 ms +
4*T(MapTask_Dev2) +
4*T(MainTask_Dev2) + 32 ms +
2*T(SafetyTask_Dev2) +
8 ms
Local output
30 ms +
2*T(SafetyTask) +
4*T(MainTask) +
4*T(MapTask) + 32 ms
16 ms +
2*T(SafetyTask) +
4*T(MainTask) +
4*T(MapTask) + 32 ms
32 ms +
4*T(MainTask) +
4*T(MapTask) +
2*T(SafetyTask) +
4*T(MainTask) +
4*T(MapTask) + 32 ms
To device 2
Local output
30 ms +
2*T(SafetyTask_Dev1) +
4*T(MapTask_Dev1) +
4*T(MainTask_Dev1) + 32 ms +
4*T(MapTask_Dev2) +
4*T(MainTask_Dev2) + 32 ms +
2*T(SafetyTask_Dev2) +
4*T(MapTask_Dev2) +
4*T(MainTask_Dev2) + 32 ms
16 ms
2*T(SafetyTask_Dev1) +
4*T(MapTask_Dev1) +
4*T(MainTask_Dev1) + 32 ms +
4*T(MapTask_Dev2) +
4*(MainTask_Dev2) + 32 ms +
2*T(SafetyTask_Dev2) +
4*T(MapTask_Dev2) +
4*T(MainTask_Dev2) + 32 ms
4*T(MapTask_Dev1) +
4*T(MainTask_Dev1) + 32 ms +
2*T(SafetyTask_Dev1) +
4*T(MapTask_Dev1) +
4*T(MainTask_Dev1) + 32 ms +
4*T(MapTask_Dev2) +
4*T(MainTask_Dev2) + 32 ms +
2*T(SafetyTask_Dev2) +
4*T(MapTask_Dev2) +
4*T(MainTask_Dev2) + 32 ms
43023
FSoE slave output
FSoE slave output
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