Festo CAMC-G-S3 Manual page 29

2 Product description of safety module CAMC-G-S3
The safety function itself contains logic and sequence functions which can be parameterised. The
safety function takes the current status of the drive (position, speed) into account and monitors the
drive. Each safety function makes the following output signals available:
– the status signal that the safety function has been requested,
– the status signal that the safe state has been reached,
– an error message in the case of violation of the safety condition.
In addition, some safety functions make yet more control signals available for the direct control of func­
tions in the drive controller. These status messages are shown as a group in the block diagram and are
indicated with VOUT_x "VIrtual Output Signals".
List of virtual outputs è Section B.1.2, Tab. B.5.
Logic functions for the inputs:
Special logical control signals are required for some applications, and are made up of a combination of
multiple input signals. The safety module supports these applications by making predefined logic func­
tions available for:
– the mode selector,
– the two-handed control device
The output signals of these logic blocks are mapped directly in LIN_x, as they also serve to control
safety functions.
However, you can configure your own additional logic blocks. The so-called ALF "Advanced Logic Func­
tions" ALF0 to ALF7 are available for this. Their output signals are available as VOUT_x "Virtual Output
Signals". List of virtual outputs è Section B.1.2, Tab. B.5.
Logical outputs and output drivers:
The safety module has configurable blocks with power drivers for:
– activating the digital outputs with the generation of test pulses,
– activating the relay output,
– activating the basic unit, e.g. the output for brake activation and to switch off the driver supply for
STO.
A configurable logic function is used to define which VOUT signals are switched to the appropriate out­
put driver as LOUT "Logic Output Signal".
The logic function consists of a product term with a maximum of seven inputs as well as input and out­
put inversion. List of virtual outputs è Section B.1.4, Tab. B.7.
The status of the logical output (one bit) is converted by the output driver to the physical output sig­
nals (frequently two signals, configurable as antivalent / equivalent / test pulses).
Feedback:
The safety module has an internal feedback path, as it is desirable in some applications to execute
safety functions according to the status of another safety or logic function:
The most important VOUT signals are therefore guided back to logical inputs LIN and are available to
logical operations.
List of logical inputs è Section B.1.1, Tab. B.2.
Festo – GDCP-CAMC-G-S3-EN – 1406NH – English 29