Response Times - Siemens SINUMERIK 840D sl Function Manual

Connecting Sensors/Actuators
7.2 Connecting I/O via PROFIsafe
Data block DB18
Two bit arrays in data block DB 18 are used to display which INSEP/OUTSEP by-
tes are only assigned to F modules as a result of the parameterization in the NCK
machine data:
S MD 10388: $MN_PROFISAFE_IN_ASSIGN
S MD 10389: $MN_PROFISAFE_OUT_ASSIGN
Data block DB18 (excerpt):
STRUCT
:
SPL_DATA:STRUCT
INSEP:
OUTSEP:
:
//External SPL input bytes(HW) with PROFIsafe slaves
INSEP_PROFISAFE:
//External SPL output bytes(HW) with PROFIsafe slaves
OUTSEP_PROFISAFE:
:
END_STRUCT;
7.2.10

Response times

The response times listed here refer exclusively to the internal processing of the
signals by the F master. The means the following:
S T(FDI –> DB18) or T(FD I–> SPL–INSE)
The transfer time from the input area of the F–DI module to the input interface
of the PLC–SPL or NCK–SPL
S T(DB18 –> FDO) or T(SPL–OUTSE –> FDO)
The transfer time from the output interface of the PLC–SPL or NCK–SPL to the
output area of the F–DO module.
S T(FDI –> FDO)
Sum of the transfer times from:
– T(FDI –> DB18) or T(FDI –> SPL–INSE)
– Processing time by the user–specific SPL program.
– T(DB18 –> FDO) or T(SPL–OUTSE –> FDO)
The following applies for the subsequent tables of the PLC and NCK processing
times:
S Values in italics can increase by up to 50 ms due to delays in the communica-
tion path between the NCK and PLC.
S PST = 50 ms (PST = PROFIsafe clock cycle) is the permanently implemented
maximum time to detect error–free communications between the NCK and
PLC. A STOP response (STOP D/E) is initiated if this time is exceeded.
S OB1 = 150 ms is the maximum time set as standard in the PLC–CPU to moni-
tor the user level. The PLC goes into the STOP state if this time is exceeded.
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SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 05.2008 Edition
ARRAY[1 ... 64] OF BOOL;
ARRAY[1 ... 64] OF BOOL;
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05.08