Chapter
9
Operating Instructions
UE4740
34
©
SICK AG • Industrial Safety Systems • Germany • All rights reserved
8020182/1CUO/2022-08-26
Subject to change without notice
Technical specifications
9.2
Response time
The response time of the EFI gateway is not the same as the overall response time of the
system. When considering the response time, you must instead calculate the response
times for the individual signal paths (for example from an EFI connection to the FPLC). The
individual signals can be of different importance when considering the safety of the entire
system.
The response time of the entire system depends, for example, on
…
the device-specific transfer time if safe SICK device communication is used at the EFI
connection,
the processing time in the EFI gateway,
the monitoring time for the cyclic service in the PROFINET IO,
the processing time in the FPLC.
Using the following calculation scheme (see Tab. 13), you determine the response time on
a signal path up to the provision of the information at the PROFINET IO output of the EFI
gateway.
Information on calculating the overall response time is available in the documentation of the
FPLC used by you. Information on calculating the (partial) response times of the devices
connected to the EFI gateway is available in the corresponding operating instructions.
Information for users of a Siemens FPLC
If you use a Siemens FPLC, you require the following data to calculate the “maximum
reaction time” of the entire system:
Siemens term
SICK term
Description
Discrepancy times
Discrepancy times
Time in ms
Max. reaction time if no error exists
Max. reaction time if an error exists
Response time
Refer to the following
table
Max. acknowledgement time
Internal processing time 6 ms
To determine the response time from the EFI interface (safe SICK device
communication) at the EFI connection to the PROFINET IO connection:
Determine the response time of the device connected to the EFI connection using the
respective operating instructions.
Request the device-specific transfer time of the safe SICK device communication from
SICK in as far as it is not already specified in Tab. 13, Line 2.
Fill out the following table to determine the response time of this signal path:
Line
Required detail
Time
1
Response time of the connected device
+ ______ ms
2
If safe SICK device communication is used:
C4000
M4000
S3000
S300
+ ______ ms
3
Internal processing time of the EFI gateway
+ 6 ms
4
Response time of the EFI connection
= ______ ms
Tab. 12: Data for calculating
the “maximum reaction time”
of the entire system
Tab. 13: Determining the
response time from the EFI
interface to the PROFINET IO
connection
