Siemens Simatic S7-300 Specifications download pdf (Page 67)

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S7-300 Automation System CPU Specifications: CPU 31xC and CPU 31x

A5E00105475-03

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Enabled interrupts also extend cycle time. Details are found in the table below.

Table 5-7 Extended cycle time due to nested interrupts

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312C 700 µs 700 µs 600 µs 400 µs 250 µs

313C 500 µs 600 µs 400 µs 300 µs 150 µs

313C-2 500 µs 600 µs 400 µs 300 µs 150 µs

314C-2 500 µs 600 µs 400 µs 300 µs 150 µs

312 700 µs 700 µs 600 µs 400 µs 250 µs

314 500 µs 600 µs 400 µs 300 µs 150 µs

315-2 500 µs 600 µs 400 µs 300 µs 150 µs

317-2 DP 190 µs 240 µs 200 µs 150 µs 90 µs

The program runtime at interrupt level must be added to this time extension.

Table 5-8 Cycle time extension as a result of errors

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312C 600 µs 600 µs

313C 400 µs 400 µs

313C2 400 µs 400 µs

314C-2 400 µs 400 µs

312 600 µs 600 µs

314 400 µs 400 µs

315-2 DP 400 µs 400 µs

317-2 DP 100 µs 100 µs

The interrupt OB processing time must be added to this extended time.

The times required for multiple nested interrupt/error OBs are added accordingly.

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Calculating method for calculating the cycle/response time.

Different cycle times.

1 2 ... 62 63 64 65 66 67 68 69 70 71 72 ... 189 190

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Siemens Simatic S7-300 Specifications Page 67