Siemens SINUMERIK 840D sl Function Manual page 193

03.06
S The specified maximum times are theoretical values; it is extremely improbable
that they actually occur in practice.
Reason for this:
– It is improbable that the run time of the PLC-F driver is delayed – in the
OB40 context – by the maximum time of 50 ms. The reason for this is that
the interrupting organizational blocks (OB8x) only have such long run times
in extremely few cases.
– For the theoretical value, it would be necessary that two consecutive runs of
the PLC-PROFIsafe master driver in the OB40 context are delayed by the
permitted maximum of 50 ms – this is extremely improbable.
– The maximum time of 150 ms for the user program is not reached in any of
the applications relevant in practice.
PLC processing times
Time: T(FDI–>DB18)
Formula
Max. times
Typical times
Time: T(DB18–>FDO)
Formula
Max. times
Typical times
Time: T(FDI–>FDO)
Formula
Max. times
Typical times
1) Typical times: PST = 16ms; OB1 = 30ms
NCK processing times: PST p2 * IPO
Time:: T(FDI–>SPL-INSE)
Formula
Max. times
Typical times
Time:: T(SPL-OUTSE–>FDO)
Formula
Max. times
© Siemens AG, 2006. All rights reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 03.2006 Edition
2 * PST + 1 * OB1
2 * 50 ms + 1 * 150 ms
1)
2 * 16 ms + 1 * 30 ms
2 * PST + 1 * OB1
2 * 50 ms + 1 * 150 ms
1)
2 * 16 ms + 1 * 30 ms
4 * PST +2 * OB1
4 * 50 ms + 2 * 150 ms
1)
4 * 16 ms + 2 * 30 ms
2 * PST + 1 * IPO
2 * 50 ms + 25 ms
1)
2 * 16 ms + 8 ms
IPO + 0...m * IPO + OB40_INT
25 ms + 50 ms + 50 ms
Connecting Sensors/Actuators
7.2 Connecting I/O via PROFIsafe
250 ms
62 ms
250 ms
62 ms
500 ms
124 ms
125 ms
40 ms
125 ms
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