•
The processing time for the chosen input.
You calculate when to switch between monitoring cases as follows
1.
First calculate how long it takes to switch between monitoring cases:
t
CSR
= t
I
where:
°
t
CSR
= time required for switching between monitoring cases in milliseconds
(ms)
°
t
I
= processing time for the selected switching type in milliseconds (ms)
•
Switching signal via network: t
I
= 28 ms
2.
Then calculate how much time is available in the response time for switching
between monitoring cases:
t
CSA
= (n – n
CS
) × t
S
where:
°
t
CSA
= time available for switching between monitoring cases in milliseconds
(ms)
°
n = set multiple sampling (default: n = 2)
°
n
CS
= multiple sampling after switching between monitoring cases (with set‐
ting
Fast
(default): n
CS
= 1, with setting
Reliable
: n
CS
= n – 1, with setting
User-defined
: n
CS
≤ n – 1)
°
t
S
= scan cycle time in milliseconds (ms)
3.
Then check whether there is enough time available for switching between monitor‐
ing cases:
°
If t
CSA
≥ t
CSR
: earlier start is not necessary.
°
If t
CSA
< t
CSR
: you must start switching between monitoring cases earlier. The
time advance t
CSP
required is: t
CSP
= t
CSR
– t
CSA
NOTE
In some cases, it is not possible to define when to switch (for example because
processing times of the machine vary) or the time advance means that the monitoring
of an area finishes too early. Follow one of the following recommendations in these
cases:
b
Allow the two protective fields to partially overlap.
b
Temporarily monitor both hazardous areas simultaneously.
4.4.5
Hazardous area protection
The safety laser scanner is mounted with a horizontal scan plane in a stationary appli‐
cation. This is, for example, on a machine where the hazardous area is not completely
surrounded by a physical guard. During hazardous area protection, the safety laser
scanner detects a person’s legs. The protective field is parallel to the person’s direction
of approach.
4
PROJECT PLANNING
34
O P E R A T I N G I N S T R U C T I O N S | outdoorScan3 – PROFINET
8027931/2022-10-24 | SICK
Subject to change without notice