Siemens: Safety Integrated - Safe Motion Control
"SINUMERIK Safety Integrated" offers utility model-tested safety functions which are able to provide a highly effective personal and machine protection in practice. All safety functions meet the requirements of safety category 3 compliant with EN 954-1 and are an integral part of the basic system. No additional sensors or evaluators are necessary. This means: Less installation effort on the machine and a "slimline" control cabinet. The scope of functions includes for example:
- functions for safe monitoring of speed and standstill as well as
- functions for safe travel range limiting and range detection.
Redundant Integrated Safety Functions
The existing multi-processor structure forms a dual-channel, diversitary system structure. The safety functions are redundantly integrated in NC, drive and internal PLC. The process variables and safety-relevant system data are cross monitored.
Safety-orientated software and hardware functions are tested by an automated forced dynamization at defined intervals. The special thing about this safety concept: Safety category 3 compliant with EN 954-1 (SIL2) can be implemented with SINUMERIK with just one measuring system, the standard motor measuring system. A second measuring transmitter is unnecessary but can be integrated as an additional, direct measuring system (e.g. linear scale).
Functions
The safety functions are available in all operating modes and can communicate with the process by safety-orientated input/output signals.
- Safe shutdown brings the drives safely from motion to standstill when a monitor or sensor (e.g. light barrier) responds.
- Safe operation stop monitors the drives at standstill within an adjustable tolerance window. The drives are fully functional in position control in this case.
- Safe stop pulse quenching of drives and therefore safe, electronic isolation of the energy supply.
- Safe reduced speed monitoring of configurable speed limit values, for example when setting up without trimming key.
- Safe software limit switch variable travel range limits, can be configured axis-specifically
- Safe software cam range detection.
- Safety-orientated input/output signals, interface to the process.
- Safe programmable logic. Direct connection of all safety-relevant signals and internal logic link.
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