BECKHOFF AX5805 Installation - Manual (Page 26)

Product description
24 AX5805
3.6.2 Configuration of the process image of the AX5805
3.6.2.1 General
The safety functions of the AX5805 are activated or deactivated in the control word and the current states of
the safety functions are returned in the status word. The control words consist of one byte with fixed data and
one byte with configurable data.
The mappings for control and status word are set via the objects 0x1600 and 0x1A00 in the Safe Parameters
of the AX5805. The configuration settings are confirmed by pressing the Update Variables button.
Note
Creating and changing the process image
The creation of the process image should take place before the creation of a Safety PLC
project. The links to the Safety PLC are deleted after each change of the process image.
Note
Order of execution of the safety functions
The safety functions are executed in the same order as in the control word.
Note
Priority of safety functions
The safety function STO (safe torque off) has the highest priority, i.e. any other activated
safety function, e.g. SLS (safe limited speed), can be interrupted by activating STO.
Figure 9: Example for SOS_1:
Note
Instance of the safety function
Functions are instanced starting at 1. Safety functions that have a maximum of one
instance (Restart_Request, Safe Maximum Speed, Safe maximum Acceleration) must be
mapped with instance number 0.