CPi offer a standard function block for their safety devices. This function block
monitors the status of the safety device during normal and test operation and interlocks
with the overall conveyor control logic.
Diagnostic information is visible on the standard CPi faceplate for SCADA or local
Safety Device status Testing / Operation.
Safety Device communication failure.
Short between safety inputs cross fault monitoring.
Status of right contact in pull switch.
Status of left contact in pull switch.
Operational status of siren, strobe and LED’s.
Extract from Conveyor Belt Installations Regulation 8.9
8.9(8) The employer must take reasonable measures to ensure that the functionality
of the devices contemplated in regulation 8.9(2)(f) and (g) and of any other safety
devices relating to the conveyor belt installation are tested weekly.
Automated Testing of Pull switches, Estops, Guards
The conveyor operator tests each pull switch or safety device to ensure its correct
During this test the associated audible and visual warnings will be activated to
Once all safety devices have passed their tests, an audible confirmation is sounded
and a report shall be automatically generated.
Reports are web based and stored in a Data warehouse for historical retrieval.
This allows multiple departments eg. Management, Safety, Engineering access to all
historical tests. A hard copy of reports for comment and filing can be generated.