Installation manual
HB-37420-810-01-25F-EN PSC1-C-100 Installation manual - V2.2.docx Page 157 of 201
Version: 25F
7.3.3.1 Example reset function with protection against incorrect usage
Function:
• On a machine, the hazard area must be protected in normal operation by a guard and in
setup up mode by an enable button in conjunction with standstill monitoring and safely
limited speed.
• The presence of the guard is monitored by an electrical sensor. If the guard is open,
movement is only possible with the enable button actuated.
• In the program this aspect is realised by a "Safety door" function (2-channel with time
monitoring) and an "Enable" function.
• The "Safety door" logic signal is generated using input pre-processing with
complementary inputs and time monitoring. The time monitoring for this element is fixed
at 3 seconds.
• If the safety door is open ("LOW" signal), the axis can be moved at reduced speed if
enabling is active.
Problem:
• If a "cross-circuit" fault is simulated on the safety door input, the PSC1 module indicates
the alarm 6701.
• This alarm can be acknowledged and the "safety door" signal correctly remains at "0".
• After the time monitoring of 3 seconds has elapsed, alarm 6701 is triggered again.
• If the enable is pressed during this period, the axis can be moved again for 3 seconds.
To Next Page
Loading...
