HB-37350-810-01-51F-EN SMX Installation manual.docx Page 188 of 234
Version: 50F
7.3.3.1 Example Reset-Function with safeguarding against false utilization
Function: On a machine for normal operation mode, the hazardous area shell be
protected by a mechanical guard system. If in setup mode, the safety level
is kept by a release button in conjunction with standstill monitoring
respevtive safe limited speed.
The guard closed position is monitored by a sensor. With the guard in open
position movement is only possible with the released button pressed.
On the application programm this function is implemeted by use of the
function „door monitoring” (2 cannel mode with time monitoring) and the
function “enabling switch”.
The logic signal „door monitoring“ is produced by computing of the input
signals versus time monitoring. The time monitoring with an allowed
difference on the expected input signals is fixed for 3 sec.
On the status “door open” (Signal “LOW” on output X23.1 and X23.2
(ID 369)) the axis can be moved with reduced speed if the enable button is
on active status.
Task:
If a faulty cross connection is detected, the SMX device will show the alarm
6701.
The alarm can be quit, in result the Signal “Dorr monitoring” is kept
correctly on “LOW” status.
After a reset the alarm 6701 will come back after 3 sec. if the wrong status
is still applied.
If within this time frame the enable button is activated, the axis can be
moved – on reduced speed only, but moved – for max. 3 sec.
The task is now to prevent a movement of the axis if the alarm will come
potentially back after a reset.
To Next Page
Loading...