hello  to everyone,

at the present moment i am working with Siemens s7 cpu 1517T-3 PN/DP through ProfiNet with Simatic ET200SP in TIA Portal v15. CPU is running in  RT  and I/Os in  IRT  mode. I am attaching here a simple project and try to analyse cycle time. i have used here SSI Absolute Encoder, which connected with TM PosInput1 to read encoder data.

In traces it can be seen one measurment timing diagram of cycle time, where i was trying to understand the sudden spike  from around 60 micro second to 200 micro second or sometime up to 500 - 600 micro second.

Can any one help me to understand this sudden change or give an idea how i can analyse this changes. My main aim is to reduce this spike up to as minimum as it could be.

thank you so much in advance
best regads,
Mr. Khokhar

Hello,

the cycletime depends on your PLC-Program.

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https://support.industry.siemens.com/cs/ww/en/view/90885040