Reaction Time On Violation Of A Safety Function - Festo CAMC-G-S3 Manual

2 Product description of safety module CAMC-G-S3
2.12.3

Reaction time on violation of a safety function

The reaction time of the safety module when hazardous movements occur or if a position encoder fails
is also made up of three components (Fig. 2.39):
Fig. 2.39 Calculation of the speed and acceleration (schematic diagram, excerpts from Fig. 2.5 and
Fig. 2.3)
T : Time from the occurrence of the hazardous movement up to mapping in the safety module (filter
F
for speed signals), or time up to the detection of the defective position encoder è Tab. 2.10,
Section 2.3.4.
T : Time for the execution of the safety or logic function of LIN_x, taking into account any allowable
L
times up to the output of the error signal VOUT_xxx_SCV è Section 2.5.
T : Time for the output of the status information VOUT_x to the digital inputs. The time is dependent
O
on the switching delay of the outputs è Section 2.8.
Detection of a dangerous movement: The reaction time up to the internal detection of the violation is
made up of:
T = T + T
res F L
Example: SSF0 safety function, indicated as SLS, allowable time P0E.03 = 4 ms
Encoder configuration with rotational speed filter P06.08 = 8 ms
Reaction times
Detection of the dangerous movement T
Signal delay in the rotational speed filter, P06.08
Safety function SS0, T
Reaction time, taking the allowable time P0E.03 into ac­
count
Total:
Detection of a dangerous movement: The time up to safe output of the status messages indicating that
the safety function has been violated is calculated thus
T = T + T + T
res F L
Festo – GDCP-CAMC-G-S3-EN – 1406NH – English
T
F
F
L
O
Logic
Safety Function
SS1
VOUT_ST O_SFR
VOUT_ST O_SSR
T
L
Minimum
8.0 ms
4.0 ms
12.0 ms
Logic DOUT40A/B
Output Driver
+
Test Pulse Unit
T
O
Maximum Typical
8.1 ms 8.0 ms
6.0 ms 5.0 ms
14.1 ms 13.0 ms
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