SECTION EIGHT – Safety function RESTART INTERLOCK (Optional)
DS2000 USER’S MANUAL (rev.C)
8.10
8.7 APPLICATION EXAMPLE
Fig.8.3 – Example of Restart Interlock with controlled stop Category 1 according to
EN 60204-1:1997
Description of the RESTART INTERLOCK FUNCTION
To get a controlled stop it is necessary to stop the motor before the activation of the HW and
SW safety channels.
When the door is opened the output13-14 of the A1 module sends to PLC the stopping
signal. Then the PLC turns low the REFERENCE ENABLE signal (inpur REF EN) in order to
stop the motor with the maximum torque available.
After a t1 delay (see par.2.14) to let the axis stopped, it is possible the activation of the SW
and HW channels.
The axis stopped status can be communicated to the PLC via the analog output TCH OUT,
not shown in the figure (see par.2.11.2.3). It is possible to use this signal together with the
above delay to disable the axis.
Software Channel
• When the door is opened, the door control module (output 13-14 of A1) activates the input
of the PLC, which, after the t1 delay, disables the axis according to the sequence of
par.8.4.2, by removing the DRIVE ENABLE signal (input DRV EN)
• The correct operation of the SW channel cannot be verified (but see also par.8.4.2.1).
To Next Page
Loading...
Need help?
General
