Festo CAMC-G-S3 Manual page 35

2 Product description of safety module CAMC-G-S3
The safety module can use the internal communication connection to manipulate the drive control
of the basic unit directly, by actively limiting the speed setpoint in the basic unit. The basic unit is
braked at the ramp parameterised in the safety module. This limiting is possible in the following
operating modes of the basic unit:
– rotational speed / speed control
– positioning (set or direct operation)
This function is used to implement the safety function SS1 or SS2 type a) è Section 2.5.3
and 2.5.4. It can also be used in conjunction with safe speed functions, such as SLS, as
the axle can be braked autonomously, even without manipulation by the controller.
If multiple safety functions are active simultaneously on the safety module and specify different
speed limits, then the minimum is formed from the limit values of all the safety functions and trans­
mitted to the basic unit.
In all interpolating operating modes, in which the basic unit is run directly via the controller, the
rotational speed should not be actively limited.
f ) Status signals:
The operating status of the safety module and the status of the safety functions (e.g. Safety Func­
tion Requested (SFR), Safe State Reached (SSR)) are transmitted at regular intervals to the basic
unit via the internal communication interface.
The basic unit can
– output and display this status via the digital outputs,
– transmit this status to the higher-order controller via the appropriately active fieldbus interface,
– output this status via the 7-segment display.
You can find the description of the available status signals in è Section 2.10.
You can find the status information available via the communication protocols FHPP and
CiA 402 in è Section A.4.
g) Error analysis / debugging:
The basic unit also receives the error status of the safety module via the communication interface
and it has access to internal status variables, such as the measured safe speed or the monitoring
limits for speed.
The basic unit uses this data:
– to display the operating status and any error messages on the 7-segment display,
– to detect all signals in a non-volatile diagnostic memory for later diagnostics,
– to analyse the status variables of the safety module via the oscilloscope function (Trace). For
example, the monitored speed limits and the current speed can be recorded to test why the
safety module has detected a violation of a safety condition.
Festo – GDCP-CAMC-G-S3-EN – 1406NH – English 35