Festo CAMC-G-S3 Manual page 31

2 Product description of safety module CAMC-G-S3
Encoder analysis
Position
[X2A], [X2B]
Sensor 1
[X2A] ...
[X2B] ...
Position
Sensor 2
[X10] ...
[X10]
Fig. 2.4 Analysis of the position sensors on the safety module
Term/abbreviation
Position Sensor 1/2
μC Base Device
Cross Comparison
Tab. 2.6 Legend for Fig. 2.4
– If two position transmitters are used, each microcontroller analyses both sensors. Each microcon­
troller compares the position and speed values of both sensors and triggers an error message if
there are impermissible deviations.
– If only one position sensor with SIL classification is used, then this is also analysed by both micro­
controllers on the safety module.
– If a position transmitter is used, which can be analysed by the basic unit (μC GG) but is not directly
supported by the safety module, the standardised angle information can be sent from the basic unit
to the safety module. In combination with a second position transmitter, which is analysed directly
by the safety module, it is possible to configure a safe system (up to SIL2). In the Tab. 2.7, the vari­
ant is indicated as "X2B other encoder".
– In all cases, there is a continuous cross-comparison of the position data between microcontroller 1
and microcontroller 2, with error triggering in the case of impermissible deviations.
– In each configuration, the two microcontrollers, 1 and 2, use various position and speed values to
monitor the axle. In addition, acceleration monitoring can also be configured for a plausibility check.
Festo – GDCP-CAMC-G-S3-EN – 1406NH – English
μC
Base Device
CAMC-G-S3
[X2A] Resolver
[X2B] SINCOS
μC 1
Cross
Comparison
μC 2
Explanation
Position encoder 1/2
Microcontroller basic unit
Cross-comparison
[X2B], other
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