Festo CAMC-G-S3 Manual page 252

A Technical appendix
Error acceptance
Supplementary requirements for resolvers with signal processing / reference generator
Crosstalk on the reference fre­
quency
– central timer fails
– no Conversion Start for ana­
logue-digital converter
– Sample & Hold occurs at the
wrong time
Analogue-digital converter
generates incorrect values
Analogue-digital converter does
not generate any values
Reference generator does not
supply any frequency
Reference generator supplies an
incorrect frequency
Reference generator does not
supply a periodic reference
signal
Amplification error during signal
processing (reference, sin, cos
signal), oscillation
Magnetic interference at the
installation location
Further requirements for the analysis of SIL position encoders
Supply voltage monitoring of the
encoder
1) Sensitivity and DC in accordance with the parameterised fault limits; specification applies to factory setting
2) Position information is "static" if there is a fault => Fixed commutating position, motor at idle / voltage of a channel static
=> Commutating position changes by max +/-90° of a signal period of an encoder, motor only moves in this range
252
Fault Error detection by the
exclusion safety module
None Individual signal monitor­
ing and vector length
None monitoring
Cross-comparison of the
position data
(Encoder 1 - encoder 2)
None
None
None
None
None
None
Sufficient
screening
for the
installation
location
None Separate generation of the
supply voltage for:
– resolver [X2A]
– SIN/COS encoder
[X2B]
– incremental encoder
[X10]
Festo – GDCP-CAMC-G-S3-EN – 1406NH – English
Supplementary notes/
comments
DC "high"
1)
–
2)