Festo CAMC-G-S3 Manual page 93

2 Product description of safety module CAMC-G-S3
Error detection
The safety condition is considered as violated when the drive moves by more than the "Position monit­
oring tolerance window" distance (±P0B.01) after P0B.00 has elapsed, or if an axle movement is detec­
ted by the speed measuring device.
Please note
In applications with only one shaft encoder / position encoder with analogue signal
interface (Resolver, SIN-/COS, Hiperface, etc.), the restrictions regarding diagnostic
cover and possible accuracy of rest and speed monitoring must be taken into account
è Appendix A.3.5 and A.3.6.
The safety function is also considered as having been violated when the actual position value assumes
the status "invalid" whilst the safety function is requested (e.g. when a position encoder fails).
If the safety condition is violated, an error is triggered. The "SOS" function is implemented in accord­
ance with EN 61800-5-2 when the error reaction to "STO" is parameterised.
The safety function can be executed independently of whether the axle is referenced or not.
Process
The sequence of the SOS safety function is shown in the following diagram:
Safety Function Request
SFR
x
n
P0B.00
n
Actual
P0B.02
Fig. 2.23 SOS flow diagram
Festo – GDCP-CAMC-G-S3-EN – 1406NH – English
Safe State Reached
SSR
P0B.01
P0B.01
t
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