B&R has integrated the Safe Torque Off (STO) safety function into its intelligent ACOPOStrak track system. After an emergency stop, all shuttle positions and motion sequences remain stored. This enables the track to start up again right where it stopped. Downtimes and non-productive trips are kept to a minimum, and the availability of the system increases.
Generally, activating the emergency stop cuts off the power supply to the entire system. The machine stops and loses all information. It must then be emptied by hand and restarted from scratch. This procedure can take as long as several hours. With the intelligent ACOPOStrak, the emergency stop activates the STO safety function. Safe pulse disabling only interrupts the power being sent to the drive. This prevents electrical torque from being generated, so the track cannot start up unintentionally. The function is certified for safety level SIL 2 / PL d / Cat. 3.
The emergency stop process with STO does not interrupt the power supply for control and position detection. All the shuttle positions, motion profiles and product payload data is retained. The track system can be started up in seconds and picks up right where it left off. In addition, the effort involved in risk analysis is reduced to a minimum since the STO safety function is already pre-certified. Products can be brought to market faster. The function is certified for a period of 20 years and makes the track system future-proof.
ACOPOStrak has a maximum safe error response time of only six milliseconds. In the context of risk analysis, the error response time is a decisive factor in the calculation of safety clearances. With its extremely short response times, ACOPOStrak allows clearances to be kept to a minimum, and the machine can be built very compactly around the track. All safety requirements of the Machinery Directive are met.
- No data loss on E-stop
- Minimal Mean Time to Repair (MTTR)
- Increased system availability
- Fast safety responses enable compact design